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Maelán Fontes, MS
Center for Primary Health Care Research
Lund University, Sweden
¿Por qué considerar la evolución en
nutrición?
Recomendaciones nutricionales actuales
Recomendaciones nutricionales actuales
Dietary Guidelines
for Americans
U.S. Department of Agriculture
U.S. Department of Health and Human Services
www.dietaryguidelines.gov
¿Qué influye en ellas?
S. Graham
J.H. Kellogg
Battle Creek
M. Bircher-Benner W.Arbuthnot-Lane
D. Burkitt
Leyendas
Dinero
Epidemiología
Teoría: asociación
entre grasa y
muerte por ECV
Ancel Keys
YERUSHALMY, J., & HILLEBOE, H. E. (1957). NewYork State Journal of Medicine,
Keys,A. (1953). Journal of the Mount Sinai Hospital, NewYork
Keys,A.., et al. (1986). American Journal of Epidemiology,
Menor mortalidad en países mediterraneos (seven countries
study group)
Observación
YERUSHALMY, J., & HILLEBOE, H. E. (1957). NewYork State Journal of Medicine,
Keys,A. (1953). Journal of the Mount Sinai Hospital, NewYork
Sofi, F., Cesari, F.,Abbate, R., Gensini, G.F. & Casini,A. (2008) Adherence to Mediterranean diet and health status:
meta-analysis. BMJ 337, a1344.
Reducción del 9% en mortalidad por riesgo CVD por cada 2 puntos
de adherencia a la dieta mediterránea
Meta-análisis
514.816 sujetos
Seguimiento 3-18 años
La epidemiología lo deja claro
Pero también estaba claro para la terapia hormonal
sustitutiva
“Overall, the bulk of the evidence strongly supports a
protective effect of estrogens that is unlikely to be explained
by confounding factors”.
Stampfer, M. J., & Colditz, G.A. (1991). Preventive Medicine.
Pero un RCT demostró aumento del riesgo de enfermedad
coronaria, cáncer de mama, ictus, embolismo pulmonar = riesgos
superan a los beneficios
Rossouw, J. E., et al. (2002). Jama,
Lo mismo con la vitamina C
Epidemiología = asociación inversa
Davey Smith et al, Int J Epidemiol 2003;32:1
Lo mismo con la vitamina C
Intervención = aumento mortalidad
Davey Smith et al, Int J Epidemiol 2003;32:1
Lo mismo con la vitamina C
Intervención = aumento mortalidad
!!!
Davey Smith et al, Int J Epidemiol 2003;32:1
Lo mismo con la vitamina C
Intervención = aumento mortalidad
!!!
Davey Smith et al, Int J Epidemiol 2003;32:1
Base de las recomendaciones: epidemiología
!!!
Base de las recomendaciones: epidemiología
!!!
Base de las recomendaciones: epidemiología
!!!
Base de las recomendaciones: epidemiología
!!!
Base de las recomendaciones: epidemiología
!!!
Base de las recomendaciones: epidemiología
!!!
Muy pocos hablan de esto
Base de las recomendaciones: epidemiología
!!!
Muy pocos hablan de esto
¿O la epidemiología no cuenta en este caso?
Más epidemiología
Más epidemiología
Mientras los estudios de cohorte han demostrado
consistentemente este efecto protector de los cereales
integrales, sólo ha habido un estudio de intervención aleatorizado
controlado en la prevención secundaria recomendando consumir
más fibra de cereales. En éste no hubo reducción del índice de
reinfarto. El estudio tenía algunas limitaciones, por ejemplo, había
ocho dietas diferentes, no se comprobó la adherencia de forma
objetiva, y la duración fue sólo 2 años.
Romanticismo por los compuestos bioactivos
En ese mismo artículo:
Truswell,A. S. (2002). European Journal of Clinical Nutrition
Romanticismo por los compuestos bioactivos
En ese mismo artículo:
In people who consume relatively large amounts of whole
grain cereals these phytoestrogens in adults may have a
protective effect against hormone-related cancers (the
structure of enterodiol is similar to that of tamoxifen).
Truswell,A. S. (2002). European Journal of Clinical Nutrition
Romanticismo por los compuestos bioactivos
En ese mismo artículo:
In people who consume relatively large amounts of whole
grain cereals these phytoestrogens in adults may have a
protective effect against hormone-related cancers (the
structure of enterodiol is similar to that of tamoxifen).
¿Efecto protectivo?
¿Por qué no perjudicial al unirse a receptores
estrogénicos?
Truswell,A. S. (2002). European Journal of Clinical Nutrition
Romanticismo por los compuestos bioactivos
En ese mismo artículo:
In people who consume relatively large amounts of whole
grain cereals these phytoestrogens in adults may have a
protective effect against hormone-related cancers (the
structure of enterodiol is similar to that of tamoxifen).
¿Efecto protectivo?
¿Por qué no perjudicial al unirse a receptores
estrogénicos?
Se ha demostrado en animales que los
fitoestrógenos de la dieta producen infertilidad
(Jefferson,WN. et al. Reproduction. 2012;143(3):
247
Truswell,A. S. (2002). European Journal of Clinical Nutrition
Romanticismo por los compuestos bioactivos
¿Las plantas producen compuestos bioactivos para
protegernos a nosotros o para protegerse de nosotros?
En ese mismo artículo:
In people who consume relatively large amounts of whole
grain cereals these phytoestrogens in adults may have a
protective effect against hormone-related cancers (the
structure of enterodiol is similar to that of tamoxifen).
¿Efecto protectivo?
¿Por qué no perjudicial al unirse a receptores
estrogénicos?
Se ha demostrado en animales que los
fitoestrógenos de la dieta producen infertilidad
(Jefferson,WN. et al. Reproduction. 2012;143(3):
247
Truswell,A. S. (2002). European Journal of Clinical Nutrition
Desde un punto de vista de la biología y
botánica está claro
Wink M.Annual Plant Reviews, Functions and Biotechnology of Plant Secondary Metabolites (Volume 39, 2). 39th ed.Wiley-Blackwell; 2010.
Wink M.Annual Plant Reviews, Functions and Biotechnology of Plant Secondary Metabolites (Volume 39, 2). 39th ed.Wiley-Blackwell; 2010.
Desde un punto de vista de la biología y
botánica está claro
Todas las plantas poseen compuestos bioactivos cuya
función es protegerse de los depredadores
Los cereales, legumbres y semillas tienen mayor
concentración, y son más problemáticos para nosotros, que
las verduras, tubérculos o frutas
Lindeberg S. Food and Western Disease: Health and nutrition from an evolutionary perspective. 1st ed.
Wiley-Blackwell; 2010.
Mensaje: elegir las plantas a las que mejor adaptados
estemos (hace muchos millones de años que comemos
fruta y los compuestos están en la semilla, no pulpa) y
variar el consumo para disminuir la exposición al mismo
compuesto bioactivo
Estudios de larga duración testando el efecto de cereales
en hard-end points
Pero volvamos a los cereales
Efectos de la fibra de cereales en el reinfarto de miocardio
2033 hombres seguidos durante casi 2 años
Aumento no significativo de la mortalidad
Burr ML, Fehily AM, Gilbert JF, et al. Lancet 1989;
2:757-761.
Efectos de la fibra de cereales en el reinfarto de miocardio
2033 hombres seguidos durante casi 2 años
Ness,A. Et al. (2002). European Journal of Clinical Nutrition
Efectos de la fibra de cereales en el reinfarto de miocardio
2033 hombres seguidos durante casi 2 años
Pero tras ajuste estadístico si hay aumento significativo
en EIC y casi significativo en mortalidad total en los dos
primeros años!
Ness,A. Et al. (2002). European Journal of Clinical Nutrition
Efectos de la fibra de cereales en el reinfarto de miocardio
2033 hombres seguidos durante casi 2 años
Pero tras ajuste estadístico si hay aumento significativo
en EIC y casi significativo en mortalidad total en los dos
primeros años!
Ness,A. Et al. (2002). European Journal of Clinical Nutrition
Estudio de intervención
Women’s Health Initiative Intervention
Modification Trial
48,835 mujeres postmenopáusicas
Intervención
19,541 29,294
Control
8 años
Modificación
intensa de la
conducta
Material educativo
relacionado con
dieta
Howard, B.V., et al. JAMA: the Journal of the American Medical Association, 2006
Estudio de intervención
Women’s Health Initiative Intervention
Modification Trial
48,835 mujeres postmenopáusicas
Intervención
19,541 29,294
Control
8 años
Reducir la grasa a <20%en, 5
raciones de fruta/verdura y >6
raciones de cereales integrales al
día
Material educativo
relacionado con
dieta
Howard, B.V., et al. JAMA: the Journal of the American Medical Association, 2006
Estudio de intervención
Women’s Health Initiative Intervention
Modification Trial
48,835 mujeres postmenopáusicas
Howard, B.V., et al. JAMA: the Journal of the American Medical Association, 2006
Estudio de intervención
Women’s Health Initiative Intervention
Modification Trial
48,835 mujeres postmenopáusicas
Howard, B.V., et al. JAMA: the Journal of the American Medical Association, 2006
No redujo el riesgo de enfermedad
coronaria, ictus o ECV
Estudio de intervención
Women’s Health Initiative Intervention
Modification Trial
48,835 mujeres postmenopáusicas
Howard, B.V., et al. JAMA: the Journal of the American Medical Association, 2006
Estudio de intervención
Women’s Health Initiative Intervention
Modification Trial
48,835 mujeres postmenopáusicas
Howard, B.V., et al. JAMA: the Journal of the American Medical Association, 2006
Si miramos la letra pequeña...y escondida, vemos lo
siguiente
Howard, B.V., et al. JAMA: the Journal of the American Medical Association, 2006
Women’s Health Initiative Intervention
Modification Trial
Probablemente las frutas/verduras no fueron un
problema...
Howard BV, et al. JAMA:The Journal of the American Medical Association 2006
Aumento del riesgo relativo de ECV a 8 años en grupo de
intervención
0
5
10
15
20
25 26
3.4% mujeres con ECV al inicio
Low-fat/high fiber diet
Women’s Health Initiative Intervention
Modification Trial
Women’s Health Initiative Intervention
Modification Trial
Shikany, J. M., et al. (2011). American Journal of Clinical Nutrition
Control de glucosa en diabéticas
Women’s Health Initiative Intervention
Modification Trial
Shikany, J. M., et al. (2011). American Journal of Clinical Nutrition
Control de glucosa en diabéticas
Women’s Health Initiative Intervention
Modification Trial
Shikany, J. M., et al. (2011). American Journal of Clinical Nutrition
Control de glucosa en diabéticas
Empeoramiento significativo del control de glucosa
en el grupo de intervención en las mujeres con
diabetes tipo 2 al inicio del estudio
The Journal of Nutrition
Nutrition and Disease
Whole-Grain Foods Do Not Affect Insulin
Sensitivity or Markers of Lipid Peroxidation
and Inflammation in Healthy, Moderately
Overweight Subjects1,2
Agneta Andersson,3
* Siv Tengblad,3
Brita Karlstro¨m,3
Afaf Kamal-Eldin,4
Rikard Landberg,4
Samar Basu,3
Per A˚ man,4
and Bengt Vessby3
3
Clinical Nutrition and Metabolism, Department of Public Health and Caring Sciences, Uppsala University, 751 85 Uppsala, Sweden
and 4
Department of Food Science, the Swedish University of Agriculture Sciences (SLU), 750 07 Uppsala, Sweden
Abstract
High intakes of whole grain foods are inversely related to the incidence of coronary heart diseases and type 2 diabetes, but
the mechanisms remain unclear. Our study aimed to evaluate the effects of a diet rich in whole grains compared with a diet
containing the same amount of refined grains on insulin sensitivity and markers of lipid peroxidation and inflammation. In a
randomized crossover study, 22 women and 8 men (BMI 28 6 2) were given either whole-grain or refined-grain products
(3 bread slices, 2 crisp bread slices, 1 portion muesli, and 1 portion pasta) to include in their habitual daily diet for two 6-wk
periods. Peripheral insulin sensitivity was determined by euglycemic hyperinsulinemic clamp tests. 8-Iso-prostaglandin F2a
(8-iso PGF2a), an F2-isoprostane, was measured in the urine as a marker of lipid peroxidation, and highly sensitive C-reactive
protein and IL-6 were analyzed in plasma as markers of inflammation. Peripheral insulin sensitivity [mg glucose Á kg body
wt21
Á min21
per unit plasma insulin (mU/L) 3 100] did not improve when subjects consumed whole-grain products (6.8 6 3.0
at baseline and 6.5 6 2.7 after 6 wk) or refined products (6.4 6 2.9 and 6.9 6 3.2, respectively) and there were no differences
between the 2 periods. Whole-grain consumption also did not affect 8-iso-PGF2a in urine, IL-6 and C-reactive protein in
plasma, blood pressure, or serum lipid concentrations. In conclusion, substitution of whole grains (mainly based on milled
wheat) for refined-grain products in the habitual daily diet of healthy moderately overweight adults for 6-wk did not affect
insulin sensitivity or markers of lipid peroxidation and inflammation. J. Nutr. 137: 1401–1407, 2007.
Introduction
Whole-grain products are reported to have several positive effects
on human health (1). An inverse, relatively strong correlation
between the intake of whole grain foods (2–6) and fiber from
grains (7–10), based mainly on FFQ and the incidence of coro-
nary heart disease, is consistently shown in epidemiological studies
of both men and women. In addition, recent studies have linked
cereal fiber and whole-grain foods to a reduced risk of type 2
diabetes (11–16) and of the metabolic syndrome (6,17). These
relations seem to be most striking among overweight subjects
(11,18,19). The scientific evidence is considered sufficient to permit
health claims regarding the cardio-protective effect of whole-
grain products in many countries including the U.S., the U.K.,
and Sweden. The claims must, however, be set within the context
of other lifestyle factors such as exercise and healthy eating habits
in general (1).
Despite indications that whole grain foods may beneficially
influence glucose and lipid metabolism, knowledge of how
biological mechanisms contribute to the health effects of whole
grain remain weak. Several bioactive components, such as die-
tary fiber, vitamins, minerals, antioxidants, and other phyto-
protectants in whole grain may act synergistically to lower the
risk of chronic diseases (20,21). Insulin resistance and oxidative
stress are both important factors in the pathogenesis of type 2
diabetes and cardiovascular diseases (22–25) and may poten-
byguestonFebruary9,2011jn.nutrition.orgDownloadedfrom
Overweight Subjects1,2
Agneta Andersson,3
* Siv Tengblad,3
Brita Karlstro¨m,3
Afaf Kamal-Eldin,4
Rikard Landberg,4
Samar Basu,3
Per A˚ man,4
and Bengt Vessby3
3
Clinical Nutrition and Metabolism, Department of Public Health and Caring Sciences, Uppsala University, 751 85 Uppsala, Sweden
and 4
Department of Food Science, the Swedish University of Agriculture Sciences (SLU), 750 07 Uppsala, Sweden
Abstract
High intakes of whole grain foods are inversely related to the incidence of coronary heart diseases and type 2 diabetes, but
the mechanisms remain unclear. Our study aimed to evaluate the effects of a diet rich in whole grains compared with a diet
containing the same amount of refined grains on insulin sensitivity and markers of lipid peroxidation and inflammation. In a
randomized crossover study, 22 women and 8 men (BMI 28 6 2) were given either whole-grain or refined-grain products
(3 bread slices, 2 crisp bread slices, 1 portion muesli, and 1 portion pasta) to include in their habitual daily diet for two 6-wk
periods. Peripheral insulin sensitivity was determined by euglycemic hyperinsulinemic clamp tests. 8-Iso-prostaglandin F2a
(8-iso PGF2a), an F2-isoprostane, was measured in the urine as a marker of lipid peroxidation, and highly sensitive C-reactive
protein and IL-6 were analyzed in plasma as markers of inflammation. Peripheral insulin sensitivity [mg glucose Á kg body
wt21
Á min21
per unit plasma insulin (mU/L) 3 100] did not improve when subjects consumed whole-grain products (6.8 6 3.0
at baseline and 6.5 6 2.7 after 6 wk) or refined products (6.4 6 2.9 and 6.9 6 3.2, respectively) and there were no differences
between the 2 periods. Whole-grain consumption also did not affect 8-iso-PGF2a in urine, IL-6 and C-reactive protein in
plasma, blood pressure, or serum lipid concentrations. In conclusion, substitution of whole grains (mainly based on milled
wheat) for refined-grain products in the habitual daily diet of healthy moderately overweight adults for 6-wk did not affect
insulin sensitivity or markers of lipid peroxidation and inflammation. J. Nutr. 137: 1401–1407, 2007.
Introduction
Whole-grain products are reported to have several positive effects
on human health (1). An inverse, relatively strong correlation
between the intake of whole grain foods (2–6) and fiber from
grain products in many countries including
and Sweden. The claims must, however, be se
of other lifestyle factors such as exercise and h
in general (1).
TABLE 5 BMI, blood pressure, and blood chemistry of all participants before and after 6 wk consuming
whole-grain or refined-grain diets1
Whole-grain period Refined-grain period
Before After Before After P-value treatment effect2
n 30 30 30 30
BMI, kg/m2
28.5 6 2.4 28.8 6 2.5a
28.4 6 2.1 28.6 6 2.1 0.046
Fasting blood glucose, mmol/L 5.2 6 0.8 5.3 6 0.8 5.2 6 0.9 5.2 6 0.8 0.28
Fasting insulin, pmol/L 56.2 6 22.9 57.6 6 24.3 60.4 6 30.6 57.6 6 25.7 0.47
Insulin sensitivity,3
M 5.9 6 2.1 5.5 6 1.7 5.7 6 1.9 6.0 6 2.0 0.24
M/I 6.8 6 3.0 6.5 6 2.7 6.4 6 2.9 6.9 6 3.2 0.79
Total cholesterol, mmol/L 5.5 6 0.7 5.5 6 0.7 5.5 6 0.8 5.5 6 0.7 0.76
HDL cholesterol, mmol/L 1.3 6 0.3 1.2 6 0.3 1.2 6 0.2 1.2 6 0.3 0.15
LDL cholesterol, mmol/L 3.7 6 0.8 3.7 6 0.7 3.7 6 0.8 3.6 6 0.7 0.40
TG cholesterol, mmol/L 1.4 6 0.8 1.5 6 0.8 1.3 6 0.6 1.6 6 1.0c
0.19
Free fatty acid, mmol/L 0.56 6 0.19 0.61 6 0.18 0.63 6 0.17 0.62 6 0.18 0.99
Systolic blood pressure, mm Hg 130 6 17 129 6 15 130 6 16 130 6 15 0.35*
Diastolic blood pressure, mm Hg 81 6 9 81 6 8 80 6 10 81 6 9 0.60
8-iso-PGF2a, nmol/mmol creatinine 0.43 6 0.14 0.43 6 0.14 0.42 6 0.15 0.44 6 0.21 0.48
a-tocopherol, mmol/mmol lipid 4.68 6 0.72 4.78 6 0.61 4.38 6 1.07 4.64 6 0.61 0.08
g-tocopherol, mmol/mmol lipid 0.26 6 0.12 0.24 6 0.07 0.26 6 0.10 0.26 6 0.10 0.10
CRP, mg/L 2.03 6 1.62 2.38 6 2.29 2.86 6 2.96 2.34 6 1.57 0.55
IL-6, ng/L 14.8 6 32.2 15.2 6 33.2 15.9 6 32.4 15.8 6 30.9 0.79
PAI-1 activity, kU/L 24.7 6 15.8 26.9 6 20.3 24.8 6 19.9 22.1 6 19.5 0.26
1
Data are means 6 SD.
2
P-values (treatment effect) for differences between the whole-grain and refined-grain diet adjusted for changes in BMI. Differences within
groups when compared to baseline: a
P , 0.001; b
P , 0.01; c
P , 0.05. *Parallel group design, only from 1st diet period (because carryover
Downloadedfrom
J. Nutr. 137: 1401–1407, 2007.!
Si diferencias entre los grupos!
Cereales integrales y marcadores inflamación/
cardiovasculares
The Journal of Nutrition
Nutrition and Disease
Whole-Grain Foods Do Not Affect Insulin
Sensitivity or Markers of Lipid Peroxidation
and Inflammation in Healthy, Moderately
Overweight Subjects1,2
Agneta Andersson,3
* Siv Tengblad,3
Brita Karlstro¨m,3
Afaf Kamal-Eldin,4
Rikard Landberg,4
Samar Basu,3
Per A˚ man,4
and Bengt Vessby3
3
Clinical Nutrition and Metabolism, Department of Public Health and Caring Sciences, Uppsala University, 751 85 Uppsala, Sweden
and 4
Department of Food Science, the Swedish University of Agriculture Sciences (SLU), 750 07 Uppsala, Sweden
Abstract
High intakes of whole grain foods are inversely related to the incidence of coronary heart diseases and type 2 diabetes, but
the mechanisms remain unclear. Our study aimed to evaluate the effects of a diet rich in whole grains compared with a diet
containing the same amount of refined grains on insulin sensitivity and markers of lipid peroxidation and inflammation. In a
randomized crossover study, 22 women and 8 men (BMI 28 6 2) were given either whole-grain or refined-grain products
(3 bread slices, 2 crisp bread slices, 1 portion muesli, and 1 portion pasta) to include in their habitual daily diet for two 6-wk
periods. Peripheral insulin sensitivity was determined by euglycemic hyperinsulinemic clamp tests. 8-Iso-prostaglandin F2a
(8-iso PGF2a), an F2-isoprostane, was measured in the urine as a marker of lipid peroxidation, and highly sensitive C-reactive
protein and IL-6 were analyzed in plasma as markers of inflammation. Peripheral insulin sensitivity [mg glucose Á kg body
wt21
Á min21
per unit plasma insulin (mU/L) 3 100] did not improve when subjects consumed whole-grain products (6.8 6 3.0
at baseline and 6.5 6 2.7 after 6 wk) or refined products (6.4 6 2.9 and 6.9 6 3.2, respectively) and there were no differences
between the 2 periods. Whole-grain consumption also did not affect 8-iso-PGF2a in urine, IL-6 and C-reactive protein in
plasma, blood pressure, or serum lipid concentrations. In conclusion, substitution of whole grains (mainly based on milled
wheat) for refined-grain products in the habitual daily diet of healthy moderately overweight adults for 6-wk did not affect
insulin sensitivity or markers of lipid peroxidation and inflammation. J. Nutr. 137: 1401–1407, 2007.
Introduction
Whole-grain products are reported to have several positive effects
on human health (1). An inverse, relatively strong correlation
between the intake of whole grain foods (2–6) and fiber from
grains (7–10), based mainly on FFQ and the incidence of coro-
nary heart disease, is consistently shown in epidemiological studies
of both men and women. In addition, recent studies have linked
cereal fiber and whole-grain foods to a reduced risk of type 2
diabetes (11–16) and of the metabolic syndrome (6,17). These
relations seem to be most striking among overweight subjects
(11,18,19). The scientific evidence is considered sufficient to permit
health claims regarding the cardio-protective effect of whole-
grain products in many countries including the U.S., the U.K.,
and Sweden. The claims must, however, be set within the context
of other lifestyle factors such as exercise and healthy eating habits
in general (1).
Despite indications that whole grain foods may beneficially
influence glucose and lipid metabolism, knowledge of how
biological mechanisms contribute to the health effects of whole
grain remain weak. Several bioactive components, such as die-
tary fiber, vitamins, minerals, antioxidants, and other phyto-
protectants in whole grain may act synergistically to lower the
risk of chronic diseases (20,21). Insulin resistance and oxidative
stress are both important factors in the pathogenesis of type 2
diabetes and cardiovascular diseases (22–25) and may poten-
byguestonFebruary9,2011jn.nutrition.orgDownloadedfrom
Overweight Subjects1,2
Agneta Andersson,3
* Siv Tengblad,3
Brita Karlstro¨m,3
Afaf Kamal-Eldin,4
Rikard Landberg,4
Samar Basu,3
Per A˚ man,4
and Bengt Vessby3
3
Clinical Nutrition and Metabolism, Department of Public Health and Caring Sciences, Uppsala University, 751 85 Uppsala, Sweden
and 4
Department of Food Science, the Swedish University of Agriculture Sciences (SLU), 750 07 Uppsala, Sweden
Abstract
High intakes of whole grain foods are inversely related to the incidence of coronary heart diseases and type 2 diabetes, but
the mechanisms remain unclear. Our study aimed to evaluate the effects of a diet rich in whole grains compared with a diet
containing the same amount of refined grains on insulin sensitivity and markers of lipid peroxidation and inflammation. In a
randomized crossover study, 22 women and 8 men (BMI 28 6 2) were given either whole-grain or refined-grain products
(3 bread slices, 2 crisp bread slices, 1 portion muesli, and 1 portion pasta) to include in their habitual daily diet for two 6-wk
periods. Peripheral insulin sensitivity was determined by euglycemic hyperinsulinemic clamp tests. 8-Iso-prostaglandin F2a
(8-iso PGF2a), an F2-isoprostane, was measured in the urine as a marker of lipid peroxidation, and highly sensitive C-reactive
protein and IL-6 were analyzed in plasma as markers of inflammation. Peripheral insulin sensitivity [mg glucose Á kg body
wt21
Á min21
per unit plasma insulin (mU/L) 3 100] did not improve when subjects consumed whole-grain products (6.8 6 3.0
at baseline and 6.5 6 2.7 after 6 wk) or refined products (6.4 6 2.9 and 6.9 6 3.2, respectively) and there were no differences
between the 2 periods. Whole-grain consumption also did not affect 8-iso-PGF2a in urine, IL-6 and C-reactive protein in
plasma, blood pressure, or serum lipid concentrations. In conclusion, substitution of whole grains (mainly based on milled
wheat) for refined-grain products in the habitual daily diet of healthy moderately overweight adults for 6-wk did not affect
insulin sensitivity or markers of lipid peroxidation and inflammation. J. Nutr. 137: 1401–1407, 2007.
Introduction
Whole-grain products are reported to have several positive effects
on human health (1). An inverse, relatively strong correlation
between the intake of whole grain foods (2–6) and fiber from
grain products in many countries including
and Sweden. The claims must, however, be se
of other lifestyle factors such as exercise and h
in general (1).
TABLE 5 BMI, blood pressure, and blood chemistry of all participants before and after 6 wk consuming
whole-grain or refined-grain diets1
Whole-grain period Refined-grain period
Before After Before After P-value treatment effect2
n 30 30 30 30
BMI, kg/m2
28.5 6 2.4 28.8 6 2.5a
28.4 6 2.1 28.6 6 2.1 0.046
Fasting blood glucose, mmol/L 5.2 6 0.8 5.3 6 0.8 5.2 6 0.9 5.2 6 0.8 0.28
Fasting insulin, pmol/L 56.2 6 22.9 57.6 6 24.3 60.4 6 30.6 57.6 6 25.7 0.47
Insulin sensitivity,3
M 5.9 6 2.1 5.5 6 1.7 5.7 6 1.9 6.0 6 2.0 0.24
M/I 6.8 6 3.0 6.5 6 2.7 6.4 6 2.9 6.9 6 3.2 0.79
Total cholesterol, mmol/L 5.5 6 0.7 5.5 6 0.7 5.5 6 0.8 5.5 6 0.7 0.76
HDL cholesterol, mmol/L 1.3 6 0.3 1.2 6 0.3 1.2 6 0.2 1.2 6 0.3 0.15
LDL cholesterol, mmol/L 3.7 6 0.8 3.7 6 0.7 3.7 6 0.8 3.6 6 0.7 0.40
TG cholesterol, mmol/L 1.4 6 0.8 1.5 6 0.8 1.3 6 0.6 1.6 6 1.0c
0.19
Free fatty acid, mmol/L 0.56 6 0.19 0.61 6 0.18 0.63 6 0.17 0.62 6 0.18 0.99
Systolic blood pressure, mm Hg 130 6 17 129 6 15 130 6 16 130 6 15 0.35*
Diastolic blood pressure, mm Hg 81 6 9 81 6 8 80 6 10 81 6 9 0.60
8-iso-PGF2a, nmol/mmol creatinine 0.43 6 0.14 0.43 6 0.14 0.42 6 0.15 0.44 6 0.21 0.48
a-tocopherol, mmol/mmol lipid 4.68 6 0.72 4.78 6 0.61 4.38 6 1.07 4.64 6 0.61 0.08
g-tocopherol, mmol/mmol lipid 0.26 6 0.12 0.24 6 0.07 0.26 6 0.10 0.26 6 0.10 0.10
CRP, mg/L 2.03 6 1.62 2.38 6 2.29 2.86 6 2.96 2.34 6 1.57 0.55
IL-6, ng/L 14.8 6 32.2 15.2 6 33.2 15.9 6 32.4 15.8 6 30.9 0.79
PAI-1 activity, kU/L 24.7 6 15.8 26.9 6 20.3 24.8 6 19.9 22.1 6 19.5 0.26
1
Data are means 6 SD.
2
P-values (treatment effect) for differences between the whole-grain and refined-grain diet adjusted for changes in BMI. Differences within
groups when compared to baseline: a
P , 0.001; b
P , 0.01; c
P , 0.05. *Parallel group design, only from 1st diet period (because carryover
Downloadedfrom
J. Nutr. 137: 1401–1407, 2007.!
Si diferencias entre los grupos!
Cereales integrales y marcadores inflamación/
cardiovasculares
Sin diferencias significativas entre cereales
integrales y refinados
Effect of Wheat Bran on Glycemic Control
and Risk Factors for Cardiovascular
Disease in Type 2 Diabetes
DAVID J. A. JENKINS, MD
1,2,3,4
CYRIL W. C. KENDALL, PHD
1,3
LIVIA S. A. AUGUSTIN, MSC
1,3
MARGARET C. MARTINI, PHD
5
METTE AXELSEN, PHD
6
DOROTHEA FAULKNER, RD
1
EDWARD VIDGEN, BSC
1,3
TINA PARKER, RD
1
HERB LAU, MD
7,8
PHILIP W. CONNELLY, PHD
2,9,10
JEROME TEITEL, MD
7,8
WILLIAM SINGER, MD
2
ARTHUR C. VANDENBROUCKE, PHD
7,10
LAWRENCE A. LEITER, MD
1,2,3,4
ROBERT G. JOSSE, MD
1,2,3,4
OBJECTIVE — Cohort studies indicate that cereal fiber reduces the risk of diabetes and
coronary heart disease (CHD). Therefore, we assessed the effect of wheat bran on glycemic
control and CHD risk factors in type 2 diabetes.
RESEARCH DESIGN AND METHODS — A total of 23 subjects with type 2 diabetes
(16 men and 7 postmenopausal women) completed two 3-month phases of a randomized
crossover study. In the test phase, bread and breakfast cereals were provided as products high in
cereal fiber (19 g/day additional cereal fiber). In the control phase, supplements were low in fiber
(4 g/day additional cereal fiber).
RESULTS — Between the test and control treatments, no differences were seen in body
weight, fasting blood glucose, HbA1c, serum lipids, apolipoproteins, blood pressure, serum uric
acid, clotting factors, homocysteine, C-reactive protein, magnesium, calcium, iron, or ferritin.
LDL oxidation in the test phase was higher than that seen in the control phase (12.1 Ϯ 5.4%, P Ͻ
0.034). Of the subjects originally recruited, more dropped out of the study for health and food
preference reasons from the control phase (16 subjects) than the test phase (11 subjects).
CONCLUSIONS — High-fiber cereal foods did not improve conventional markers of glyce-
mic control or risk factors for CHD in type 2 diabetes over 3 months. Possibly longer studies are
required to demonstrate the benefits of cereal fiber. Alternatively, cereal fiber in the diet may be
a marker for another component of whole grains that imparts health advantages or a healthy
lifestyle.
Diabetes Care 25:1522–1528, 2002
T
here is much interest in the possible
health benefits of fiber-containing
cereals (1–3). The exact component
or facet of fiber that is responsible has not
been clearly defined, and there are indi-
cations that the whole grain confers met-
abolic benefits (4) and reduces the risk of
chronic disease (1,5,6). The results of
large cohort studies have suggested that
wheat fiber protects against the develop-
ment of diabetes (1–3). Many diabetes as-
sociations advise increased fiber intake,
either to improve glycemic control (7) or
to confer general health benefits (8). In-
creases in fiber from a variety of dietary
sources have been shown to improve gly-
cemic control in type 2 diabetes (9). Early
studies suggested that cereal fiber im-
proved both glycemic control in diabetes
(10) and glucose tolerance in nondiabetic
subjects (11). The reason for the benefi-
cial effects of nonviscous cereal fiber is not
clear. Cereal fibers do not reduce the rate
of gastric emptying and small intestinal
absorption or flatten the postprandial gly-
cemic response to a high-carbohydrate
test meal (12). In contrast, viscous fibers
such as guar and pectin have been shown
to reduce the rate of gastric emptying (13)
and small intestinal absorption (14),
thereby providing a mechanism for po-
tential benefits. These fibers have been
shown to reduce postprandial glycemia
when added to test meals. They also de-
crease 24-h urinary glucose losses when
added to the diets of subjects with type 2
diabetes (15).
Furthermore, it is wheat fiber, rather
than viscous fiber, that for more than two
decades has been shown consistently in
cohort studies to be associated with a re-
duced risk of heart disease (5,6,16,17).
These effects are seen despite the fact that
viscous fibers from oats, barley, psyllium,
pectins, and guar gum have been shown
to lower serum cholesterol and improve
the blood lipid profile, whereas the insol-
● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ●
From the 1
Clinical Nutrition and Risk Factor Modification Center, St. Michael’s Hospital, Toronto, Ontario,
Canada; the 2
Department of Medicine, Division of Endocrinology and Metabolism, St. Michael’s Hospital,
Toronto, Ontario, Canada; the 3
Department of Nutritional Sciences, Faculty of Medicine, University of
Toronto, Toronto, Ontario, Canada; the 4
Department of Medicine, Faculty of Medicine, University of
Toronto, Toronto, Ontario, Canada; 5
Kraft Foods, Glenview, Illinois; the 6
Lundberg Laboratory for Diabetic
Research, Department of Internal Medicine, Sahlgrenska University Hospital, Go¨teborg, Sweden; the 7
De-
partment of Laboratory Medicine, Division of Clinical Biochemistry, St. Michael’s Hospital, Toronto, On-
tario, Canada; the 8
Department of Hematology, St. Michael’s Hospital, Toronto, Ontario, Canada; the
9
Department of Biochemistry, Faculty of Medicine, University of Toronto, Toronto, Ontario, Canada; and
the 10
Department of Laboratory Medicine and Pathobiology, Faculty of Medicine, University of Toronto,
Toronto, Ontario, Canada.
Address correspondence and reprint requests to David J. A. Jenkins, Clinical Nutrition and Risk Factor
Modification Center, St. Michael’s Hospital, 61 Queen St. East, Toronto, Ontario, Canada, M5C 2T2. E-mail:
C l i n i c a l C a r e / E d u c a t i o n / N u t r i t i o n
O R I G I N A L A R T I C L E
METTE AXELSEN, PHD
DOROTHEA FAULKNER, RD
1
EDWARD VIDGEN, BSC
1,3
TINA PARKER, RD
1
ARTHUR C. VANDENBROUCKE, PHD
7,10
LAWRENCE A. LEITER, MD
1,2,3,4
ROBERT G. JOSSE, MD
1,2,3,4
OBJECTIVE — Cohort studies indicate that cereal fiber reduces the risk of diabetes and
coronary heart disease (CHD). Therefore, we assessed the effect of wheat bran on glycemic
control and CHD risk factors in type 2 diabetes.
RESEARCH DESIGN AND METHODS — A total of 23 subjects with type 2 diabetes
(16 men and 7 postmenopausal women) completed two 3-month phases of a randomized
crossover study. In the test phase, bread and breakfast cereals were provided as products high in
cereal fiber (19 g/day additional cereal fiber). In the control phase, supplements were low in fiber
(4 g/day additional cereal fiber).
RESULTS — Between the test and control treatments, no differences were seen in body
weight, fasting blood glucose, HbA1c, serum lipids, apolipoproteins, blood pressure, serum uric
acid, clotting factors, homocysteine, C-reactive protein, magnesium, calcium, iron, or ferritin.
LDL oxidation in the test phase was higher than that seen in the control phase (12.1 Ϯ 5.4%, P Ͻ
0.034). Of the subjects originally recruited, more dropped out of the study for health and food
preference reasons from the control phase (16 subjects) than the test phase (11 subjects).
CONCLUSIONS — High-fiber cereal foods did not improve conventional markers of glyce-
mic control or risk factors for CHD in type 2 diabetes over 3 months. Possibly longer studies are
required to demonstrate the benefits of cereal fiber. Alternatively, cereal fiber in the diet may be
a marker for another component of whole grains that imparts health advantages or a healthy
lifestyle.
Diabetes Care 25:1522–1528, 2002
been clearly de
cations that the
abolic benefits
chronic diseas
large cohort st
wheat fiber pro
ment of diabete
sociations advi
either to impro
to confer gener
creases in fiber
sources have be
cemic control in
studies sugges
proved both gly
(10) and glucos
subjects (11). T
cial effects of no
clear. Cereal fib
of gastric emp
absorption or fl
cemic respons
test meal (12).
such as guar an
to reduce the ra
and small int
thereby provid
tential benefits
shown to redu
when added to
crease 24-h uri
MARGARET C. MARTINI, PHD
5
METTE AXELSEN, PHD
6
DOROTHEA FAULKNER, RD
1
EDWARD VIDGEN, BSC
1,3
TINA PARKER, RD
1
WILLIAM SINGER, MD
2
ARTHUR C. VANDENBROUCKE, PHD
7,10
LAWRENCE A. LEITER, MD
1,2,3,4
ROBERT G. JOSSE, MD
1,2,3,4
OBJECTIVE — Cohort studies indicate that cereal fiber reduces the risk of diabetes and
coronary heart disease (CHD). Therefore, we assessed the effect of wheat bran on glycemic
control and CHD risk factors in type 2 diabetes.
RESEARCH DESIGN AND METHODS — A total of 23 subjects with type 2 diabetes
(16 men and 7 postmenopausal women) completed two 3-month phases of a randomized
crossover study. In the test phase, bread and breakfast cereals were provided as products high in
cereal fiber (19 g/day additional cereal fiber). In the control phase, supplements were low in fiber
(4 g/day additional cereal fiber).
RESULTS — Between the test and control treatments, no differences were seen in body
weight, fasting blood glucose, HbA1c, serum lipids, apolipoproteins, blood pressure, serum uric
acid, clotting factors, homocysteine, C-reactive protein, magnesium, calcium, iron, or ferritin.
LDL oxidation in the test phase was higher than that seen in the control phase (12.1 Ϯ 5.4%, P Ͻ
0.034). Of the subjects originally recruited, more dropped out of the study for health and food
preference reasons from the control phase (16 subjects) than the test phase (11 subjects).
CONCLUSIONS — High-fiber cereal foods did not improve conventional markers of glyce-
mic control or risk factors for CHD in type 2 diabetes over 3 months. Possibly longer studies are
required to demonstrate the benefits of cereal fiber. Alternatively, cereal fiber in the diet may be
a marker for another component of whole grains that imparts health advantages or a healthy
lifestyle.
Diabetes Care 25:1522–1528, 2002
Tor facet of fiber
been clearly de
cations that the
abolic benefits (
chronic disease
large cohort stu
wheat fiber pro
ment of diabete
sociations advis
either to improv
to confer gener
creases in fiber
sources have be
cemic control in
studies suggest
proved both gly
(10) and glucos
subjects (11). T
cial effects of no
clear. Cereal fib
of gastric empt
absorption or fla
cemic response
test meal (12).
such as guar an
to reduce the ra
and small inte
thereby providi
tential benefits.
shown to redu
when added to
LIVIA S. A. AUGUSTIN, MSC
MARGARET C. MARTINI, PHD
5
METTE AXELSEN, PHD
6
DOROTHEA FAULKNER, RD
1
EDWARD VIDGEN, BSC
1,3
TINA PARKER, RD
1
JEROME TEITEL, MD
WILLIAM SINGER, MD
2
ARTHUR C. VANDENBROUCKE, PHD
7,10
LAWRENCE A. LEITER, MD
1,2,3,4
ROBERT G. JOSSE, MD
1,2,3,4
OBJECTIVE — Cohort studies indicate that cereal fiber reduces the risk of diabetes and
coronary heart disease (CHD). Therefore, we assessed the effect of wheat bran on glycemic
control and CHD risk factors in type 2 diabetes.
RESEARCH DESIGN AND METHODS — A total of 23 subjects with type 2 diabetes
(16 men and 7 postmenopausal women) completed two 3-month phases of a randomized
crossover study. In the test phase, bread and breakfast cereals were provided as products high in
cereal fiber (19 g/day additional cereal fiber). In the control phase, supplements were low in fiber
(4 g/day additional cereal fiber).
RESULTS — Between the test and control treatments, no differences were seen in body
weight, fasting blood glucose, HbA1c, serum lipids, apolipoproteins, blood pressure, serum uric
acid, clotting factors, homocysteine, C-reactive protein, magnesium, calcium, iron, or ferritin.
LDL oxidation in the test phase was higher than that seen in the control phase (12.1 Ϯ 5.4%, P Ͻ
0.034). Of the subjects originally recruited, more dropped out of the study for health and food
preference reasons from the control phase (16 subjects) than the test phase (11 subjects).
CONCLUSIONS — High-fiber cereal foods did not improve conventional markers of glyce-
mic control or risk factors for CHD in type 2 diabetes over 3 months. Possibly longer studies are
required to demonstrate the benefits of cereal fiber. Alternatively, cereal fiber in the diet may be
a marker for another component of whole grains that imparts health advantages or a healthy
lifestyle.
Diabetes Care 25:1522–1528, 2002
Tcereals (1–
or facet of fiber
been clearly de
cations that the
abolic benefits
chronic diseas
large cohort stu
wheat fiber pro
ment of diabete
sociations advi
either to impro
to confer gener
creases in fiber
sources have be
cemic control in
studies sugges
proved both gly
(10) and glucos
subjects (11). T
cial effects of no
clear. Cereal fib
of gastric empt
absorption or fl
cemic response
test meal (12).
such as guar an
to reduce the ra
and small int
thereby provid
tential benefits
shown to redu
Jenkins D, et al. Diabetes Care 25:1522–1528, 2002!
Cereales integrales y marcadores inflamación/
cardiovasculares
Effect of Wheat Bran on Glycemic Control
and Risk Factors for Cardiovascular
Disease in Type 2 Diabetes
DAVID J. A. JENKINS, MD
1,2,3,4
CYRIL W. C. KENDALL, PHD
1,3
LIVIA S. A. AUGUSTIN, MSC
1,3
MARGARET C. MARTINI, PHD
5
METTE AXELSEN, PHD
6
DOROTHEA FAULKNER, RD
1
EDWARD VIDGEN, BSC
1,3
TINA PARKER, RD
1
HERB LAU, MD
7,8
PHILIP W. CONNELLY, PHD
2,9,10
JEROME TEITEL, MD
7,8
WILLIAM SINGER, MD
2
ARTHUR C. VANDENBROUCKE, PHD
7,10
LAWRENCE A. LEITER, MD
1,2,3,4
ROBERT G. JOSSE, MD
1,2,3,4
OBJECTIVE — Cohort studies indicate that cereal fiber reduces the risk of diabetes and
coronary heart disease (CHD). Therefore, we assessed the effect of wheat bran on glycemic
control and CHD risk factors in type 2 diabetes.
RESEARCH DESIGN AND METHODS — A total of 23 subjects with type 2 diabetes
(16 men and 7 postmenopausal women) completed two 3-month phases of a randomized
crossover study. In the test phase, bread and breakfast cereals were provided as products high in
cereal fiber (19 g/day additional cereal fiber). In the control phase, supplements were low in fiber
(4 g/day additional cereal fiber).
RESULTS — Between the test and control treatments, no differences were seen in body
weight, fasting blood glucose, HbA1c, serum lipids, apolipoproteins, blood pressure, serum uric
acid, clotting factors, homocysteine, C-reactive protein, magnesium, calcium, iron, or ferritin.
LDL oxidation in the test phase was higher than that seen in the control phase (12.1 Ϯ 5.4%, P Ͻ
0.034). Of the subjects originally recruited, more dropped out of the study for health and food
preference reasons from the control phase (16 subjects) than the test phase (11 subjects).
CONCLUSIONS — High-fiber cereal foods did not improve conventional markers of glyce-
mic control or risk factors for CHD in type 2 diabetes over 3 months. Possibly longer studies are
required to demonstrate the benefits of cereal fiber. Alternatively, cereal fiber in the diet may be
a marker for another component of whole grains that imparts health advantages or a healthy
lifestyle.
Diabetes Care 25:1522–1528, 2002
T
here is much interest in the possible
health benefits of fiber-containing
cereals (1–3). The exact component
or facet of fiber that is responsible has not
been clearly defined, and there are indi-
cations that the whole grain confers met-
abolic benefits (4) and reduces the risk of
chronic disease (1,5,6). The results of
large cohort studies have suggested that
wheat fiber protects against the develop-
ment of diabetes (1–3). Many diabetes as-
sociations advise increased fiber intake,
either to improve glycemic control (7) or
to confer general health benefits (8). In-
creases in fiber from a variety of dietary
sources have been shown to improve gly-
cemic control in type 2 diabetes (9). Early
studies suggested that cereal fiber im-
proved both glycemic control in diabetes
(10) and glucose tolerance in nondiabetic
subjects (11). The reason for the benefi-
cial effects of nonviscous cereal fiber is not
clear. Cereal fibers do not reduce the rate
of gastric emptying and small intestinal
absorption or flatten the postprandial gly-
cemic response to a high-carbohydrate
test meal (12). In contrast, viscous fibers
such as guar and pectin have been shown
to reduce the rate of gastric emptying (13)
and small intestinal absorption (14),
thereby providing a mechanism for po-
tential benefits. These fibers have been
shown to reduce postprandial glycemia
when added to test meals. They also de-
crease 24-h urinary glucose losses when
added to the diets of subjects with type 2
diabetes (15).
Furthermore, it is wheat fiber, rather
than viscous fiber, that for more than two
decades has been shown consistently in
cohort studies to be associated with a re-
duced risk of heart disease (5,6,16,17).
These effects are seen despite the fact that
viscous fibers from oats, barley, psyllium,
pectins, and guar gum have been shown
to lower serum cholesterol and improve
the blood lipid profile, whereas the insol-
● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ●
From the 1
Clinical Nutrition and Risk Factor Modification Center, St. Michael’s Hospital, Toronto, Ontario,
Canada; the 2
Department of Medicine, Division of Endocrinology and Metabolism, St. Michael’s Hospital,
Toronto, Ontario, Canada; the 3
Department of Nutritional Sciences, Faculty of Medicine, University of
Toronto, Toronto, Ontario, Canada; the 4
Department of Medicine, Faculty of Medicine, University of
Toronto, Toronto, Ontario, Canada; 5
Kraft Foods, Glenview, Illinois; the 6
Lundberg Laboratory for Diabetic
Research, Department of Internal Medicine, Sahlgrenska University Hospital, Go¨teborg, Sweden; the 7
De-
partment of Laboratory Medicine, Division of Clinical Biochemistry, St. Michael’s Hospital, Toronto, On-
tario, Canada; the 8
Department of Hematology, St. Michael’s Hospital, Toronto, Ontario, Canada; the
9
Department of Biochemistry, Faculty of Medicine, University of Toronto, Toronto, Ontario, Canada; and
the 10
Department of Laboratory Medicine and Pathobiology, Faculty of Medicine, University of Toronto,
Toronto, Ontario, Canada.
Address correspondence and reprint requests to David J. A. Jenkins, Clinical Nutrition and Risk Factor
Modification Center, St. Michael’s Hospital, 61 Queen St. East, Toronto, Ontario, Canada, M5C 2T2. E-mail:
C l i n i c a l C a r e / E d u c a t i o n / N u t r i t i o n
O R I G I N A L A R T I C L E
METTE AXELSEN, PHD
DOROTHEA FAULKNER, RD
1
EDWARD VIDGEN, BSC
1,3
TINA PARKER, RD
1
ARTHUR C. VANDENBROUCKE, PHD
7,10
LAWRENCE A. LEITER, MD
1,2,3,4
ROBERT G. JOSSE, MD
1,2,3,4
OBJECTIVE — Cohort studies indicate that cereal fiber reduces the risk of diabetes and
coronary heart disease (CHD). Therefore, we assessed the effect of wheat bran on glycemic
control and CHD risk factors in type 2 diabetes.
RESEARCH DESIGN AND METHODS — A total of 23 subjects with type 2 diabetes
(16 men and 7 postmenopausal women) completed two 3-month phases of a randomized
crossover study. In the test phase, bread and breakfast cereals were provided as products high in
cereal fiber (19 g/day additional cereal fiber). In the control phase, supplements were low in fiber
(4 g/day additional cereal fiber).
RESULTS — Between the test and control treatments, no differences were seen in body
weight, fasting blood glucose, HbA1c, serum lipids, apolipoproteins, blood pressure, serum uric
acid, clotting factors, homocysteine, C-reactive protein, magnesium, calcium, iron, or ferritin.
LDL oxidation in the test phase was higher than that seen in the control phase (12.1 Ϯ 5.4%, P Ͻ
0.034). Of the subjects originally recruited, more dropped out of the study for health and food
preference reasons from the control phase (16 subjects) than the test phase (11 subjects).
CONCLUSIONS — High-fiber cereal foods did not improve conventional markers of glyce-
mic control or risk factors for CHD in type 2 diabetes over 3 months. Possibly longer studies are
required to demonstrate the benefits of cereal fiber. Alternatively, cereal fiber in the diet may be
a marker for another component of whole grains that imparts health advantages or a healthy
lifestyle.
Diabetes Care 25:1522–1528, 2002
been clearly de
cations that the
abolic benefits
chronic diseas
large cohort st
wheat fiber pro
ment of diabete
sociations advi
either to impro
to confer gener
creases in fiber
sources have be
cemic control in
studies sugges
proved both gly
(10) and glucos
subjects (11). T
cial effects of no
clear. Cereal fib
of gastric emp
absorption or fl
cemic respons
test meal (12).
such as guar an
to reduce the ra
and small int
thereby provid
tential benefits
shown to redu
when added to
crease 24-h uri
MARGARET C. MARTINI, PHD
5
METTE AXELSEN, PHD
6
DOROTHEA FAULKNER, RD
1
EDWARD VIDGEN, BSC
1,3
TINA PARKER, RD
1
WILLIAM SINGER, MD
2
ARTHUR C. VANDENBROUCKE, PHD
7,10
LAWRENCE A. LEITER, MD
1,2,3,4
ROBERT G. JOSSE, MD
1,2,3,4
OBJECTIVE — Cohort studies indicate that cereal fiber reduces the risk of diabetes and
coronary heart disease (CHD). Therefore, we assessed the effect of wheat bran on glycemic
control and CHD risk factors in type 2 diabetes.
RESEARCH DESIGN AND METHODS — A total of 23 subjects with type 2 diabetes
(16 men and 7 postmenopausal women) completed two 3-month phases of a randomized
crossover study. In the test phase, bread and breakfast cereals were provided as products high in
cereal fiber (19 g/day additional cereal fiber). In the control phase, supplements were low in fiber
(4 g/day additional cereal fiber).
RESULTS — Between the test and control treatments, no differences were seen in body
weight, fasting blood glucose, HbA1c, serum lipids, apolipoproteins, blood pressure, serum uric
acid, clotting factors, homocysteine, C-reactive protein, magnesium, calcium, iron, or ferritin.
LDL oxidation in the test phase was higher than that seen in the control phase (12.1 Ϯ 5.4%, P Ͻ
0.034). Of the subjects originally recruited, more dropped out of the study for health and food
preference reasons from the control phase (16 subjects) than the test phase (11 subjects).
CONCLUSIONS — High-fiber cereal foods did not improve conventional markers of glyce-
mic control or risk factors for CHD in type 2 diabetes over 3 months. Possibly longer studies are
required to demonstrate the benefits of cereal fiber. Alternatively, cereal fiber in the diet may be
a marker for another component of whole grains that imparts health advantages or a healthy
lifestyle.
Diabetes Care 25:1522–1528, 2002
Tor facet of fiber
been clearly de
cations that the
abolic benefits (
chronic disease
large cohort stu
wheat fiber pro
ment of diabete
sociations advis
either to improv
to confer gener
creases in fiber
sources have be
cemic control in
studies suggest
proved both gly
(10) and glucos
subjects (11). T
cial effects of no
clear. Cereal fib
of gastric empt
absorption or fla
cemic response
test meal (12).
such as guar an
to reduce the ra
and small inte
thereby providi
tential benefits.
shown to redu
when added to
LIVIA S. A. AUGUSTIN, MSC
MARGARET C. MARTINI, PHD
5
METTE AXELSEN, PHD
6
DOROTHEA FAULKNER, RD
1
EDWARD VIDGEN, BSC
1,3
TINA PARKER, RD
1
JEROME TEITEL, MD
WILLIAM SINGER, MD
2
ARTHUR C. VANDENBROUCKE, PHD
7,10
LAWRENCE A. LEITER, MD
1,2,3,4
ROBERT G. JOSSE, MD
1,2,3,4
OBJECTIVE — Cohort studies indicate that cereal fiber reduces the risk of diabetes and
coronary heart disease (CHD). Therefore, we assessed the effect of wheat bran on glycemic
control and CHD risk factors in type 2 diabetes.
RESEARCH DESIGN AND METHODS — A total of 23 subjects with type 2 diabetes
(16 men and 7 postmenopausal women) completed two 3-month phases of a randomized
crossover study. In the test phase, bread and breakfast cereals were provided as products high in
cereal fiber (19 g/day additional cereal fiber). In the control phase, supplements were low in fiber
(4 g/day additional cereal fiber).
RESULTS — Between the test and control treatments, no differences were seen in body
weight, fasting blood glucose, HbA1c, serum lipids, apolipoproteins, blood pressure, serum uric
acid, clotting factors, homocysteine, C-reactive protein, magnesium, calcium, iron, or ferritin.
LDL oxidation in the test phase was higher than that seen in the control phase (12.1 Ϯ 5.4%, P Ͻ
0.034). Of the subjects originally recruited, more dropped out of the study for health and food
preference reasons from the control phase (16 subjects) than the test phase (11 subjects).
CONCLUSIONS — High-fiber cereal foods did not improve conventional markers of glyce-
mic control or risk factors for CHD in type 2 diabetes over 3 months. Possibly longer studies are
required to demonstrate the benefits of cereal fiber. Alternatively, cereal fiber in the diet may be
a marker for another component of whole grains that imparts health advantages or a healthy
lifestyle.
Diabetes Care 25:1522–1528, 2002
Tcereals (1–
or facet of fiber
been clearly de
cations that the
abolic benefits
chronic diseas
large cohort stu
wheat fiber pro
ment of diabete
sociations advi
either to impro
to confer gener
creases in fiber
sources have be
cemic control in
studies sugges
proved both gly
(10) and glucos
subjects (11). T
cial effects of no
clear. Cereal fib
of gastric empt
absorption or fl
cemic response
test meal (12).
such as guar an
to reduce the ra
and small int
thereby provid
tential benefits
shown to redu
Jenkins D, et al. Diabetes Care 25:1522–1528, 2002!
Cereales integrales y marcadores inflamación/
cardiovasculares
Aumento de la oxidación del LDL durante la
fase de consumo de salvado de trigo
Resumen cereales integrales y ECV
Epidemiología: protectores
Intervención: sin efecto o posible aumento del riesgo (WHI
& DART)
Conclusiones de las revisiones sistemáticas sobre los
cereales integrales
Kelly, S. A. M., Summerbell, C. D., Brynes, A., Whittaker, V., & Frost, G. (2007). Wholegrain cereals for coronary heart disease. Cochrane Database of Systematic Reviews (Online), (2),
CD005051. doi:10.1002/14651858.CD005051.pub2
Priebe, M. G., van Binsbergen, J. J., deVos, R., &Vonk, R. J. (2008).Whole grain foods for the prevention of type 2 diabetes mellitus. Cochrane Database of Systematic Reviews (Online), (1), CD006061. doi:
10.1002/14651858.CD006061.pub2
Lefevre, M., & Jonnalagadda, S. (2012). Effect of whole grains on markers of subclinical inflammation. Nutrition Reviews
American Diabetes Association Statement
Evert,A. B., Boucher, J. L., Cypress, M., Dunbar, S.A., Franz, M. J., Mayer-Davis, E. J., et al. (2014). Nutrition therapy recommendations for the management of adults with diabetes.
Diabetes Care, 37 Suppl 1(Supplement_1), S120–43. doi:10.2337/dc14-S120
American Diabetes Association Statement
Evert,A. B., Boucher, J. L., Cypress, M., Dunbar, S.A., Franz, M. J., Mayer-Davis, E. J., et al. (2014). Nutrition therapy recommendations for the management of adults with diabetes.
Diabetes Care, 37 Suppl 1(Supplement_1), S120–43. doi:10.2337/dc14-S120
Nada específico para los cereales
The Swedish Council on Health Technology Assessment (Statens Beredning för medicinsk Utvärdering), www.sbu.se
Evidencia de alta calidad
No hay estudios, no hay
recomendaciones
Asplund, K., Axelsen, M., Berglund, G., & Berne, C. (2010). Dietary Treatment of Diabetes. SBU-Swedish Council on Health Technology Assessment.
Evidencia de calidad moderada
Dietas muy bajas en CHO vs. moderadas bajas en
grasa
(algo mejor efecto en A1c y peso en 12-14 meses)
Dieta moderada baja en CHO (30-40% en) vs. dieta
alta en CHO (50-60% en)
(algo mejor efecto en HDL)
Asplund, K., Axelsen, M., Berglund, G., & Berne, C. (2010). Dietary Treatment of Diabetes. SBU-Swedish Council on Health Technology Assessment.
Alcohol
(menor riesgo de ECV con consumo regular vs. no consumo)
Café
(menor riesgo de muerte por enf. Isquémica coronaria con >2 tazas/
día)
Evidencia de baja calidad
Verduras, legumbres, índice glucémico bajo, ’dieta
mediterránea’
Pescado y omega-3 (en mujeres)
Asplund, K., Axelsen, M., Berglund, G., & Berne, C. (2010). Dietary Treatment of Diabetes. SBU-Swedish Council on Health Technology Assessment.
Evidencia de muy baja calidad
Índice glucémico muy bajo, carga glucémica, dieta
baja en grasa, etc.
Asplund, K., Axelsen, M., Berglund, G., & Berne, C. (2010). Dietary Treatment of Diabetes. SBU-Swedish Council on Health Technology Assessment.
No hay estudios de alta calidad para la
diabetes
Ajala, O., et al.American Journal of Clinical Nutrition, 2013
Livesey, G., et al.American Journal of Clinical Nutrition, 2013
Nield, L., et al. Cochrane database of systematic reviews. 2007
Priebe, M. G., et al. Cochrane database of systematic reviews. 2008
Mente,A.,deKoning,L.,Shannon,H.S.& Anand,S.S.(2009) A systematic review of the evidence supporting a causal link
between dietary factors and coronary heart disease. Arch Intern Med 169, 659–69.
Faltan ensayos clínicos
Aún en 2010, no había RCTs para muchas recomendaciones
habituales, respecto al riesgo cardiovascular
Mente,A.,deKoning,L.,Shannon,H.S.& Anand,S.S.(2009) A systematic review of the evidence supporting a causal link
between dietary factors and coronary heart disease. Arch Intern Med 169, 659–69.
Faltan ensayos clínicos
Aún en 2010, no había RCTs para muchas recomendaciones
habituales, respecto al riesgo cardiovascular
American Institute for Cancer Research 11th Annual
Research Conference on Diet, Nutrition and Cancer
The Mediterranean Diets: What Is So Special about the Diet of Greece?
The Scientific Evidence1
Artemis P. Simopoulos2
The Center for Genetics, Nutrition and Health, Washington, DC
ABSTRACT The term “Mediterranean diet,” implying that all Mediterranean people have the same diet, is a
misnomer. The countries around the Mediterranean basin have different diets, religions and cultures. Their diets
differ in the amount of total fat, olive oil, type of meat and wine intake; milk vs. cheese; fruits and vegetables; and
the rates of coronary heart disease and cancer, with the lower death rates and longer life expectancy occurring in
Greece. Extensive studies on the traditional diet of Greece (the diet before 1960) indicate that the dietary pattern
of Greeks consists of a high intake of fruits, vegetables (particularly wild plants), nuts and cereals mostly in the form
of sourdough bread rather than pasta; more olive oil and olives; less milk but more cheese; more fish; less meat;
and moderate amounts of wine, more so than other Mediterranean countries. Analyses of the dietary pattern of the
diet of Crete shows a number of protective substances, such as selenium, glutathione, a balanced ratio of
(n-6):(n-3) essential fatty acids (EFA), high amounts of fiber, antioxidants (especially resveratrol from wine and
polyphenols from olive oil), vitamins E and C, some of which have been shown to be associated with lower risk of
cancer, including cancer of the breast. These findings should serve as a strong incentive for the initiation of
intervention trials that will test the effect of specific dietary patterns in the prevention and management of patients
with cancer. J. Nutr. 131: 3065S–3073S, 2001.
KEY WORDS: c diet of Crete c (n-3) fatty acids c wild plants c antioxidants c cancer c (n-6) fatty acids
The health of the individual and the population in general
is the result of interactions between genetics and a number of
environmental factors. Nutrition is an environmental factor of
major importance (1–4). Our genetic profile has not changed
over the past 10,000 y, whereas major changes have taken
place in our food supply and in energy expenditure and phys-
ical activity (5–17). Today industrialized societies are charac-
terized by the following: 1) an increase in energy intake and
decrease in energy expenditure; 2) an increase in saturated fat,
(n-6) fatty acids and trans fatty acids and a decrease in (n-3)
fatty acid intake; 3) a decrease in complex carbohydrates and
fiber intake; 4) an increase in cereal grains and a decrease in
fruit and vegetable intake; and 5) a decrease in protein, anti-
oxidant and calcium intake (5–17). Furthermore, the ratio of
(n-6) to (n-3) fatty acids is 16.74:1, whereas during evolution
it was 2–1:1 (Table 1, Fig. 1).
Recent investigations of the dietary patterns and health
status of the countries surrounding the Mediterranean basin
clearly indicate major differences among them in both dietary
intake and health status. Therefore, the term “Mediterranean
diet” is a misnomer. There is not just one Mediterranean diet
but in fact many Mediterranean diets (18), which is not
surprising because the countries along the Mediterranean ba-
sin have different religions, economic and cultural traditions
and diets. Diets are influenced by religious habits, that is,
Muslims do not eat pork or drink wine and other alcoholic
drinks, whereas Greek Orthodox populations usually do not
eat meat on Wednesdays and Fridays but drink wine, and so
on. Although Greece and the Mediterranean countries are
usually considered to be areas of medium-high death rates
(14.0–18.0 per 1000 inhabitants), death rates on the island of
Crete have been below this level continuously since before
1930 (19). No other area in the Mediterranean basin has had
as low a death rate as Crete, according to data compiled by the
United Nations in their demographic yearbook for 1948. It
was 11.3–13.7 per 1000 inhabitants before World War II and
;10.6 in 1946–1948 (19). Cancer and heart disease caused
almost three times as many deaths proportionally in the
United States as in Crete (19). The diet of Crete represents
the traditional diet of Greece before 1960. The Seven Coun-
tries Study was the first to establish credible data on cardio-
vascular disease prevalence rates in contrasting populations
(United States, Finland, The Netherlands, Italy, former Yu-
goslavia, Japan and Greece), with differences found on the
order of 5- to 10-fold in coronary heart disease (20). In 1958,
the field work started in Dalmatia in the former Yugoslavia.
1
Presented as part of the 11th Annual Research Conference on Diet, Nutrition
and Cancer held in Washington, DC, July 16–17, 2001. This conference was
sponsored by the American Institute for Cancer Research and was supported by
the California Dried Plum Board, The Campbell Soup Company, General Mills,
Lipton, Mead Johnson Nutritionals, Roche Vitamins Inc. and Vitasoy USA. Guest
editors for this symposium publication were Ritva R. Butrum and Helen A.
Norman, American Institute for Cancer Research, Washington, DC.
2
To whom correspondence should be addressed.
E-mail: cgnh@bellatlantic.net
0022-3166/01 $3.00 © 2001 American Society for Nutritional Sciences.
3065S
byonSeptember27,2006jn.nutrition.orgDownloadedfrom
Artemis P. Simopoulos
The Center for Genetics, Nutrition and Health, Washington, DC
ABSTRACT The term “Mediterranean diet,” implying that all Mediterranean people have the same d
misnomer. The countries around the Mediterranean basin have different diets, religions and cultures. Th
differ in the amount of total fat, olive oil, type of meat and wine intake; milk vs. cheese; fruits and vegetab
the rates of coronary heart disease and cancer, with the lower death rates and longer life expectancy occ
Greece. Extensive studies on the traditional diet of Greece (the diet before 1960) indicate that the dietary
of Greeks consists of a high intake of fruits, vegetables (particularly wild plants), nuts and cereals mostly in
of sourdough bread rather than pasta; more olive oil and olives; less milk but more cheese; more fish; les
and moderate amounts of wine, more so than other Mediterranean countries. Analyses of the dietary patte
diet of Crete shows a number of protective substances, such as selenium, glutathione, a balanced
(n-6):(n-3) essential fatty acids (EFA), high amounts of fiber, antioxidants (especially resveratrol from w
polyphenols from olive oil), vitamins E and C, some of which have been shown to be associated with lowe
cancer, including cancer of the breast. These findings should serve as a strong incentive for the initi
intervention trials that will test the effect of specific dietary patterns in the prevention and management of
with cancer. J. Nutr. 131: 3065S–3073S, 2001.
KEY WORDS: c diet of Crete c (n-3) fatty acids c wild plants c antioxidants c cancer c (n-6) fatt
The health of the individual and the population in general
is the result of interactions between genetics and a number of
environmental factors. Nutrition is an environmental factor of
major importance (1–4). Our genetic profile has not changed
over the past 10,000 y, whereas major changes have taken
place in our food supply and in energy expenditure and phys-
ical activity (5–17). Today industrialized societies are charac-
terized by the following: 1) an increase in energy intake and
decrease in energy expenditure; 2) an increase in saturated fat,
(n-6) fatty acids and trans fatty acids and a decrease in (n-3)
fatty acid intake; 3) a decrease in complex carbohydrates and
fiber intake; 4) an increase in cereal grains and a decrease in
fruit and vegetable intake; and 5) a decrease in protein, anti-
oxidant and calcium intake (5–17). Furthermore, the ratio of
(n-6) to (n-3) fatty acids is 16.74:1, whereas during evolution
it was 2–1:1 (Table 1, Fig. 1).
Recent investigations of the dietary patterns and health
status of the countries surrounding the Mediterranean basin
clearly indicate major differences among them in both dietary
intake and health status. Therefore, the term
diet” is a misnomer. There is not just one Me
but in fact many Mediterranean diets (18
surprising because the countries along the M
sin have different religions, economic and c
and diets. Diets are influenced by religious
Muslims do not eat pork or drink wine and
drinks, whereas Greek Orthodox population
eat meat on Wednesdays and Fridays but dri
on. Although Greece and the Mediterrane
usually considered to be areas of medium-h
(14.0–18.0 per 1000 inhabitants), death rates
Crete have been below this level continuou
1930 (19). No other area in the Mediterrane
as low a death rate as Crete, according to data
United Nations in their demographic yearb
was 11.3–13.7 per 1000 inhabitants before W
;10.6 in 1946–1948 (19). Cancer and hea
almost three times as many deaths propo
¿Existe una dieta mediterránea?
¿Existe una dieta mediterránea?
El pan sourdough no contiene gluten, si la pasta...entre
otras diferencias
FESNAD-SEEDO. (2011). Recomendaciones nutricionales basadas en la evidencia para la prevención y el tratamiento del sobrepeso y la obesidad en adultos (Consenso FESNAD-
SEEDO). Revista Española De Obesidad, 19(1), 1–80.
FESNAD-SEEDO. (2011). Recomendaciones nutricionales basadas en la evidencia para la prevención y el tratamiento del sobrepeso y la obesidad en adultos (Consenso FESNAD-
SEEDO). Revista Española De Obesidad, 19(1), 1–80.
FESNAD-SEEDO. (2011). Recomendaciones nutricionales basadas en la evidencia para la prevención y el tratamiento del sobrepeso y la obesidad en adultos (Consenso FESNAD-
SEEDO). Revista Española De Obesidad, 19(1), 1–80.
FESNAD-SEEDO. (2011). Recomendaciones nutricionales basadas en la evidencia para la prevención y el tratamiento del sobrepeso y la obesidad en adultos (Consenso FESNAD-
SEEDO). Revista Española De Obesidad, 19(1), 1–80.
Grado de recomendación para las dietas mediterráneas y
vegetarianas, y cereales integrales en la prevención de la
obesidad: C
¿Y el estudio PREDIMED?
Mejor que una dieta low-fat (parecida a WHI) y además con
un sesgo importante: falta de apoyo en grupo control
¿Y el estudio PREDIMED?
Mejor que una dieta low-fat (parecida a WHI) y además con
un sesgo importante: falta de apoyo en grupo control
¿Y el estudio PREDIMED?
Mejor que una dieta low-fat (parecida a WHI) y además con
un sesgo importante: falta de apoyo en grupo control
¿Y el estudio PREDIMED?
Mejor que una dieta low-fat (parecida a WHI) y además con
un sesgo importante: falta de apoyo en grupo control
Recuerden resultados del WHI
¿Y el estudio PREDIMED?
¿Los cereales integrales jugaron un papel en los efectos?
Mejor que una dieta low-fat (parecida a WHI) y además con
un sesgo importante: falta de apoyo en grupo control
¿Y el estudio PREDIMED?
Estruch R, et al. N Engl J Med. 2013
Estamos de acuerdo que la dieta mediterránea es
mejor que la dieta occidental: no significa que sea
necesariamente la mejor dieta para el ser humano
¿Y el Lyon Diet Heart Study?
de Lorgeril, M., Salen, P., Martin, J. L., Monjaud, I., Delaye, J., & Mamelle, N. (1999). Mediterranean diet, traditional risk factors, and the rate of cardiovascular complications after myocardial
infarction: final report of the Lyon Diet Heart Study. Circulation, 99(6), 779–785.
¿Y el Lyon Diet Heart Study?
de Lorgeril, M., Salen, P., Martin, J. L., Monjaud, I., Delaye, J., & Mamelle, N. (1999). Mediterranean diet, traditional risk factors, and the rate of cardiovascular complications after myocardial
infarction: final report of the Lyon Diet Heart Study. Circulation, 99(6), 779–785.
Mejor que dieta low-fat
...pero
Una vez más, el grupo control recibió
menos apoyo conductual
0 0.5 1.0 1.5
Non-westerner
Westerner with “low” risk
Westerner with “normal” risk
Westerner with “high” risk
Riesgo relativo de las enf. de la civilización
Riesgos relativos
Lindeberg S. Food and Western Disease. 1st ed.Wiley-Blackwell; 2010.
0 0.5 1.0 1.5
Non-westerner
Westerner with “low” risk
Westerner with “normal” risk
Westerner with “high” risk
Riesgo relativo de las enf. de la civilización
Riesgos relativos
Lindeberg S. Food and Western Disease. 1st ed.Wiley-Blackwell; 2010.
La mayoría de dietas se aplican en individuos con alto
riesgo con dietas control de eficacia dudosa
Revisión sistemática sobre dieta Mediterránea en
prevención primaria de ECV
Rees, K.,. (2013). Cochrane Database Syst Rev.
Revisión sistemática sobre dieta Mediterránea en
prevención primaria de ECV
Rees, K.,. (2013). Cochrane Database Syst Rev.
Importante: analizaron RCTs donde el grupo control no
recibió intervención o era mínima (más motivación en
grupo de dieta mediterránea)
Revisión sistemática sobre dieta Mediterránea en
prevención primaria de ECV
Rees, K.,. (2013). Cochrane Database Syst Rev.
Importante: analizaron RCTs donde el grupo control no
recibió intervención o era mínima (más motivación en
grupo de dieta mediterránea)
Revisión sistemática sobre dieta Mediterránea en
prevención primaria de ECV
Rees, K.,. (2013). Cochrane Database Syst Rev.
Importante: analizaron RCTs donde el grupo control no
recibió intervención o era mínima (más motivación en
grupo de dieta mediterránea)
Conclusión: evidencia limitada y necesidad de más (y
mejores) estudios
Está bien pasar de riesgo alto a normal
...pero, ¿Quién quiere ser normal?
La soja (legumbre y proteína vegetal) es mejor que la
caseína1
Pero la caseína produce aterosclerosis, resistencia a la
insulina y lipotoxicidad en experimentos animales1,2,3,4,5
1.Ascencio, C., et al. (2004). J Nutr
2. Huff,M.W., et al.(1982).Atherosclerosis
3. Lavigne, C., et al. (2001).Am J Physiol Endocrinol Metab
4.Wilson,T.A., et al. (2000). Nutr Res
5. Kritchevsky, D. (1995). J Nutr
Además, la proteína animal (bisonte y ternera),
produce mucha menos aterosclerosis que la
proteína de soja4
Ejemplo del problema de la dieta control si no tenemos en
cuenta la evolución
En experimentos animales
¿Se puede concluir que la soja es beneficiosa?
High-Milk Supplementation with Healthy Diet
Counseling Does not Affect Weight Loss but
Ameliorates Insulin Action Compared with
Low-Milk Supplementation in
Overweight Children1–3
Marie-Pierre St-Onge,4,5
* Laura Lee T. Goree,5
and Barbara Gower5
4
College of Physicians and Surgeons, Columbia University and New York Obesity Research Center, St. Luke’s/Roosevelt Hospital,
New York, NY 10025 and 5
Department of Nutrition Sciences, University of Alabama, Birmingham, AL 35294
Abstract
Milk consumption has decreased in children over the past years. This may play a role in the prevalence of pediatric obesity,
because clinical studies have found a beneficial effect of milk consumption for weight management. The objectives of this
study were to test whether high-milk consumption leads to greater weight loss and improvements in metabolic risk
factors than low milk consumption during a 16-wk healthy eating diet. Overweight children aged 8–10 y were randomized
to either high (4 3 236 mL/d) or low (1 3 236 mL/d) milk consumption. Children were provided dietary counseling on
healthy eating at baseline and at wk 1, 2, 4, 6, 8, and 12. Serum glucose, insulin, and lipids were measured in fasting
children at baseline and wk 8 and 16. An oral glucose tolerance test and body composition assessment by magnetic
resonance imaging were conducted at baseline and endpoint. Body weight changes during the16-wk study not differ
between the high-milk (1.3 6 0.3 kg) and low-milk (1.1 6 0.3 kg) groups. There was no beverage 3 week interaction on any
of the body composition and metabolic variables studied (blood pressure, serum lipids, glucose, and insulin). There was a
beverage 3 week interaction (P ¼ 0.044) on insulin area under the curve showing a trend toward reduced insulin output
with a glucose challenge after high-milk consumption (P ¼ 0.062). These data suggest that in overweight children, high-
milk consumption in conjunction with a healthy diet does not lead to greater weight loss but may ameliorate insulin action
compared with low-milk consumption. J. Nutr. 139: 933–938, 2009.
Introduction
There is increasing concern regarding beverage type consump-
tion in U.S. children. Recent epidemiological studies have
pared with 8.3 and 20.6%, respectively, in the 1999–2001
national survey (5).
These changes in beverage consumption patterns may have
atColoradoStUnivLibonApril16,2009jn.nutrition.orgDownloadedfrom
Dieta rica en leche vs. Dieta en la que la leche fue
sustituida por una bebida con azúcar
Sin alteraciones de la insulinemia de ayunas
Respuesta insulinémica post-prandial
estadísticamente menor en el grupo de la dieta rica
en leche
Stancliffe, R.A., et al. (2011). American Journal of Clinical Nutrition
Texto
Dieta control: lácteos sustituidos por carne procesada,
sustitutos de carne basada en soja, fruta, cereales y galletas
con mantequilla de cacahuete
Texto
Idem con muchos estudios con cereales integrales y
legumbres: dieta control no adecuada o falta de apoyo
Look AHEAD Research Group,Wing, R. R., Bolin, P., Brancati, F. L., Bray, G.A., Clark, J. M., et al. (2013). The New England Journal of Medicine
Look AHEAD
5,145 diabéticos con obesidad
Intervención Control
Dieta hipocalórica/<30%
grasa/>15% proteína/
cereales integrales
+
175 min ejercicio/semana
Educación y apoyo
sobre diabetes (otra vez
menos apoyo en grupo
control)
Otro estudio de larga duración
Look AHEAD Research Group,Wing, R. R., Bolin, P., Brancati, F. L., Bray, G.A., Clark, J. M., et al. (2013). The New England Journal of Medicine
Look AHEAD
Look AHEAD Research Group,Wing, R. R., Bolin, P., Brancati, F. L., Bray, G.A., Clark, J. M., et al. (2013). The New England Journal of Medicine
Look AHEAD
Tras 9,6 años, y con pérdida de peso (6%) y reducción de
HbA1c, ninguna diferencia en muerte por ECV, infarto de
miocardio no fatal, ictus no fatal u hospitalización por
angina
Por lo tanto, ¿hasta qué punto me puedo fiar de los
biomarcadores?
Cerhan JR, et al. Mayo Clin Proc. 2014
Circunferencia de cintura y riesgo de mortalidad en
650.000 adultos
Cerhan JR, et al. Mayo Clin Proc. 2014
Circunferencia de cintura y riesgo de mortalidad en
650.000 adultos
Todos tenemos un riesgo normal (1.0), pero lo
normal sería tener un riesgo 0, como en
poblaciones de cazadores-recolectores
Por lo tanto, si no se considera la evolución a la
hora de diseñar estudios de intervención, pasar de
riesgo 1.8 a 1.3 está “bien”
Los estudios Women’s Health Initiative, PREDIMED y Look
AHEAD dejan claro que seguir una dieta saludable no es
suficiente
Conclusión: no existe suficiente evidencia para recomendar
los cereales integrales en la prevención y el tratamiento de
ECV, diabetes u obesidad
Howard, B.V., et al. JAMA: the Journal of the American Medical Association, 2006
Burr, M. L., Fehily,A. M., Gilbert, J. F., Rogers, S., Holliday, R. M., Sweetnam, P. M., et al. (1989). Effects of changes in fat, fish, and fibre intakes on death and myocardial reinfarction: diet
and reinfarction trial (DART). Lancet, 2(8666), 757–761.
Kelly, S.A. M., Summerbell, C. D., Brynes,A.,Whittaker,V., & Frost, G. (2007).Wholegrain cereals for coronary heart disease. Cochrane Database of Systematic Reviews (Online), (2),
CD005051. doi:10.1002/14651858.CD005051.pub2
Priebe, M. G., van Binsbergen, J. J., deVos, R., &Vonk, R. J. (2008).Whole grain foods for the prevention of type 2 diabetes mellitus. Cochrane Database of Systematic Reviews (Online),
(1), CD006061. doi:10.1002/14651858.CD006061.pub2
Lefevre, M., & Jonnalagadda, S. (2012). Effect of whole grains on markers of subclinical inflammation. Nutrition Reviews
Evert,A. B., Boucher, J. L., Cypress, M., Dunbar, S.A., Franz, M. J., Mayer-Davis, E. J., et al. (2014). Nutrition therapy recommendations for the management of adults with diabetes.
Diabetes Care, 37 Suppl 1(Supplement_1), S120–43. doi:10.2337/dc14-S120
Asplund, K.,Axelsen, M., Berglund, G., & Berne, C. (2010). Dietary Treatment of Diabetes. SBU-Swedish Council on HealthTechnology Assessment.
FESNAD-SEEDO. (2011). Recomendaciones nutricionales basadas en la evidencia para la prevención y el tratamiento del sobrepeso y la obesidad en adultos (Consenso FESNAD-
SEEDO). Revista Española De Obesidad, 19(1), 1–80.
¿Por qué considerar la evolución?
Lindeberg S. Food and Western Disease. 1st ed.Wiley-Blackwell; 2010.
vs.
Ideología Biología
Es sorprendente que J.H. Kellogg tenga más
influencia en la nutrición que Charles Darwin
Eaton, S. B., & Konner, M. (1985). Paleolithic nutrition.A consideration of its nature and current implications. The New England Journal of Medicine,
Este artículo hizo pensar a algunos curiosos
Wood, B. Proc Natl Acad Sci USA, 2010
Agricultura: un periodo de tiempo infinitesimal a escala
evolutiva
Paleolítico
Agricultura
0,4% de nuestra evolución
Campbell, M. C., & Tishkoff, S. A. Annual Review of Genomics and Human Genetics, 2008
Todos venimos de un grupo de 1,000 individuos que vivieron en
África hace 200,000 años
Campbell, M. C., & Tishkoff, S. A. Annual Review of Genomics and Human Genetics, 2008
Todos venimos de un grupo de 1,000 individuos que vivieron en
África hace 200,000 años
Hasta este momento, todos teníamos la misma dieta
¿Qué comíamos?
¿Qué comíamos?
¿Mejora esta dieta si añadimos cereales y lácteos?
¿Existen riesgos si consumimos estos alimentos?
Lo conocido
Dieta omnívora
Lo incierto
Cuanta cantidad de alimentos
animal/vegetal
Lo conocido
No alimentos occidentales
Cordain L. Implications of Plio-Pleistocene Hominin Diets for Modern Humans.
In: Early Hominin Diets:The Known, the Unknown, and the Unknowable. Ungar, P (Ed.), Oxford University Press, Oxford, 2006, pp 363-83
Aceites refinados
Azúcar
Sal Alcohol
Lácteos
Carnes procesadas
Cereales
Legumbres
Alimentos occidentales
Potenciales efectos negativos de compuestos bioactivos de
los cereales
Endocrinos
Unión a receptores opioides: exorfinas A5 y B51, 2
Unión a receptores de insulina y leptina: lectinas3, 4
Unión a receptores de estrógenos: fitoestrógenos5
1. Schusdziarra, et al. (1981). Diabetes
2. SchusdziarraV, et al. Peptides 1984
3. Cuatrecasas, P., & Tell, G. P. (1973). Proceedings of the National Academy of Sciences of the United States of America
4. Jönsson T, et al. BMC Endocr Disord. 2005
5. Jefferson,W. N., et al. (2012). Reproduction
6. Cordain L. Br. J. Nutr. 2000
7. Junker,Y., et al. (2012).. Journal of Experimental Medicine
8. Unitt, J., & Hornigold, D. (2011). Biochemical Pharmacology
9.Visser, J., et al. (2009). Annals of the NewYork Academy of Sciences
10. Cordain, L. (1999). World Review of Nutrition and Dietetics
11. Pusztai,A., et al. (1993). British Journal of Nutrition
12. Sjölander,A., et al. (1984). International Archives of Allergy and Applied Immunology
Inmunológicos
Disruptores de membranas (glicocalix): lectinas6,12
Estimulación del sistema inmune innato: gliadina y lectinas7,8,9
Mimetismo molecular con autoantígenos6,10
Antinutrientes
Acido fítico10
Lectinas N-acetilglucosamina específicas11
Trigo, receptores opioides y glucagón
Efectos de la misma cantidad
de CHO en forma de
glucosa o diferentes formas
de trigo en la secreción de
glucagón
NOTA: no es
aconsejable que se
aumente la producción
de glucagón en el
estado posprandial
(Unger RH, et al. J.
Clin. Investig. 2012)
Behall, K. M., et al. (1999). Journal of the American College of Nutrition,
Un ejemplo
Proteínas de la leche de vaca y diabetes tipo 1
Reducción significativa de marcadores de
autoinmunidad para células beta con caseína
hidrolizada vs. leche de fórmula a base de leche de vaca
Knip, M., et al. (2010). New England Journal of Medicine
Potenciales factores dietéticos en la diabetes tipo1
http://www.diapedia.org/type-1-diabetes-mellitus/environmental-factors
Fuente: Diapedia.org
Potenciales factores dietéticos en la diabetes tipo1
http://www.diapedia.org/type-1-diabetes-mellitus/environmental-factors
No es evidencia de grado A, pero con los estudios
de biología molecular y de animales, ¿por qué correr
riesgos teniendo otros alimentos más seguros que
cumplan los objetivos nutricionales?
De nuevo, alimentos introducidos en el neolítico
Fuente: Diapedia.org
Los alimentos no son sólo macro y
micronutrientes
Que una alimentación cumpla los objetivos nutricionales no
significa que sea óptima para la salud a largo plazo
Selección natural
¿Qué hace falta? Presión selectiva
¿El consumo de cereales produce una presión selectiva negativa?
¿Son suficientes 10,000 años?...probablemente no.
Persistencia de la lactasa de adulto
Presión selectiva positiva muy fuerte porque mermaba la
capacidad reproductiva en N-O de Europa (raquitismo) y
África sub-sahariana (Malaria)
https://s3.amazonaws.com/paleodietevo2/research/Malaria+and+Rickets+Represent+Selective+Forces+for+the+Convergent+Evolution+of+Adult+Lactase+Persistence+The+Paleo+Diet.pdf
Referencia:
Persistencia de la lactasa de adulto
Presión selectiva positiva muy fuerte porque mermaba la
capacidad reproductiva en N-O de Europa (raquitismo) y
África sub-sahariana (Malaria)
https://s3.amazonaws.com/paleodietevo2/research/Malaria+and+Rickets+Represent+Selective+Forces+for+the+Convergent+Evolution+of+Adult+Lactase+Persistence+The+Paleo+Diet.pdf
Referencia:
Y aún así todavía no todos (65%) estamos adaptados a
digerir lactosa
Nota importante: estar adaptado a digerir lactosa no
significa estar adaptado a beber leche (proteínas)
Perry GH, et al. Nat Genet 2007
Alfa amilasa salivar
Perry GH, et al. Nat Genet 2007
Estar adaptado a comer más almidón no significa estar adaptado
a comer cereales si tienes susceptibilidad a la celiaquía
Alfa amilasa salivar
¿Estamos todos completamente adaptados a los cereales?
¿Estamos todos completamente adaptados a los cereales?
La sensibilidad al gluten (no celiaquía) afecta a 6-10%
población en el RU
¿Y que ocurre con las otras 40,000 proteínas del trigo?
Cuestiones
Si nos adaptáramos bien a los cereales en 10,000 años, en
Oriente Medio habría menos prevalencia de celiaquía
Cuestiones
Cuestiones
No es tan sencillo como decir, “10,000 es suficiente tiempo
para adaptarnos, ¿Por qué razón no íbamos a adaptarnos?”
Pues porque hace falta presión selectiva que merme capacidad
reproductiva(concepto básico de biología evolutiva)
Stearns, S. C., & Koella, J. C. (2008). Evolution in Health and Disease (2nd ed.). Oxford University Press, USA.
No es tan sencillo como decir, “10,000 es suficiente tiempo
para adaptarnos, ¿Por qué razón no íbamos a adaptarnos?”
Pues porque hace falta presión selectiva que merme capacidad
reproductiva(concepto básico de biología evolutiva)
Stearns, S. C., & Koella, J. C. (2008). Evolution in Health and Disease (2nd ed.). Oxford University Press, USA.
Hawks, J., et al. (2007). Proc Natl Acad Sci USA
Fumagalli, M., et al. (2011). PLoS Genetics,
Incluso teniendo en cuenta la reciente aceleración en la
adaptación humana
Hawks, J., et al. (2007). Proc Natl Acad Sci USA
Fumagalli, M., et al. (2011). PLoS Genetics,
Incluso teniendo en cuenta la reciente aceleración en la
adaptación humana
Pero en gran parte es debida a epidemias, no sólo a la
dieta
Hawks, J., et al. (2007). Proc Natl Acad Sci USA
Fumagalli, M., et al. (2011). PLoS Genetics,
Incluso teniendo en cuenta la reciente aceleración en la
adaptación humana
Pero en gran parte es debida a epidemias, no sólo a la
dieta
Hawks, J., et al. (2007). Proc Natl Acad Sci USA
Fumagalli, M., et al. (2011). PLoS Genetics,
Incluso teniendo en cuenta la reciente aceleración en la
adaptación humana
Pero en gran parte es debida a epidemias, no sólo a la
dieta
Hawks, J., et al. (2007). Proc Natl Acad Sci USA
Fumagalli, M., et al. (2011). PLoS Genetics,
Ya lo explicamos hace tiempo...
¿Cuánto tiempo tardaremos en adaptarnos a los azúcares
refinados?
¿Cuanto tiempo tardaremos en adaptarnos al
sedentarismo?
Si nos adaptamos tan fácilmente a los alimentos nuevos
(como algunos postulan)
...o, ¿no suponen una presión selectiva positiva para
mermar capacidad reproductiva?
Leche materna
Los bebés alimentados con leche de fórmula crecen
(aparentemente) “bien” (igual que las personas alimentadas
a base de cereales)
La leche de fórmula puede contener todos los nutrientes
necesarios para el desarrollo del bebé
La leche materna contiene compuestos bioactivos,
probióticos, oligosacáridos, etc, que producen efectos
inmuno-endocrinos más allá de los nutrientes
¿Influye de igual manera la leche materna que la de
fórmula en la salud del niño y del adulto?
Leche materna
Si alimentamos a todos los bebés con leche de fórmula los
primeros meses de vida, la especie humana seguirá viva
(probablemente) dentro de 10,000 años
¿Nos habremos adaptado completamente a la leche de
fórmula dentro de 10,000 años y podremos prescindir de la
lactancia?
Piense de igual manera con los cereales ya que no sólo son
un compendio de nutrientes (hay más de 40,000 proteínas
y otros compuestos bioactivos que no sabemos
exactamente que función tienen)
Leche materna
La leche materna es un buen ejemplo de que los alimentos
no sólo son macro/micronutrientes
La leche materna parece que afecta de forma diferente a la
microbiota comparada con la leche de fórmula, y ese efecto
es independiente de los macro/micronutrientes
Kerr CA, et al. Crit Rev Microbiol. 2014
“Debemos comer un poco de todo”
“La dieta debe ser balanceada, variada…”
¿Si? ¿Cual es la justificación?
“Argumentos” típicos
“Ya no existen los alimentos que habían en el paleolítico”
“Argumentos” típicos
“Ni las condiciones ambientales son iguales”
“Ya no existen los alimentos que habían en el paleolítico”
“Argumentos” típicos
“Ni las condiciones ambientales son iguales”
Eso es obvio, se trata de minimizar riesgos reduciendo el
consumo de alimentos a los que no estemos bien
adaptados
Toxicidad aguda vs toxicidad a largo plazo
Un alimento se ha considerado tradicionalmente
comestible, si su toxicidad a corto plazo es baja o
inexistente
Toxicología
Pero, ¿Hay toxicidad acumulativa, a largo plazo?¿carencias
nutricionales?
Las proteínas de caseína y soja inducen aterosclerosis en
animales1,2,3,4
Hay evidencia indirecta de que los cereales, particularmente
el trigo, pueden producir aterosclerosis5
1. Eastwood, M., & Kritchevsky, D. (2005). DIETARY FIBER: How Did We Get Where We Are? Annual Review of Nutrition, 25(1), 1–8.
2. Kritchevsky, D. (1979).Vegetable protein and atherosclerosis. Journal of the American Oil Chemists' Society, 56(3), 135–140.
3. Kritchevsky, D.,Tepper, S.A., & Klurfeld, D. M. (1998). Lectin may contribute to the atherogenicity of peanut oil. Lipids, 33(8), 821–823.
4. Kritchevsky, D.,Tepper, S.A.,Williams, D. E., & Story, J.A. (1977). Experimental atherosclerosis in rabbits fed cholesterol-free diets Part 7. Interaction of animal or vegetable protein with fiber.Atherosclerosis,
26(4), 397–403.
5. Lindeberg S. Food and Western Disease. 1st ed.Wiley-Blackwell; 2010.
¡No la de bisonte o ternera!
¿Cómo sabemos que no ocurre lo mismo en humanos a
largo plazo?
1. Eastwood, M., & Kritchevsky, D. (2005). DIETARY FIBER: How Did We Get Where We Are? Annual Review of Nutrition, 25(1), 1–8.
2. Kritchevsky, D. (1979).Vegetable protein and atherosclerosis. Journal of the American Oil Chemists' Society, 56(3), 135–140.
3. Kritchevsky, D.,Tepper, S.A., & Klurfeld, D. M. (1998). Lectin may contribute to the atherogenicity of peanut oil. Lipids, 33(8), 821–823.
4. Kritchevsky, D.,Tepper, S.A.,Williams, D. E., & Story, J.A. (1977). Experimental atherosclerosis in rabbits fed cholesterol-free diets Part 7. Interaction of animal or vegetable protein with fiber.Atherosclerosis,
26(4), 397–403.
5. Lindeberg S. Food and Western Disease. 1st ed.Wiley-Blackwell; 2010.
¿Qué problemas puede causar el consumo de cereales y
lácteos si mis biomarcadores están bien?
Los biomarcadores no son fiables para predecir un infarto
de miocardio o ictus
La enfermedad isquémica del corazón es una enfermedad
“silenciosa” que tarda décadas en manifestarse
Lindeberg S. Food and Western Disease. 1st ed.Wiley-Blackwell; 2010.
Con permiso de: Lindeberg S. Food and Western Disease. 1st ed.Wiley-Blackwell; 2010.
Una dieta
saludable parece
no ser suficiente
para evitar este
proceso
Otro ejemplo de posibles efectos a largo plazo
Weber, M., E., et al. (2014). American Journal of Clinical Nutrition
Pero si miramos los detalles...
Habría otra forma (perspectiva evolutiva) de verlo:
Higher cow’s milk protein content in infant formula increases BMI
and obesity risk at school age: follow-up of a randomized trial
¿Cuál es la referencia, los que toman alta cantidad de
proteína o los que toman pecho?
¿Le darías de comer estos alimentos a un gato?
¿Por qué no aplicar el “un poco
de todo”?
Pájaro carnívoro Estructura pancreática
muy diferente
Pájaro granívoro
¿Estarán adaptados a dietas
diferentes?
¿Si les cambiamos la dieta
alteraremos su respuesta
endocrina?
Pilny,A.A. (2008).The Avian Pancreas in Health and Disease. Veterinary Clinics of North America: Exotic Animal Practice, 11(1), 25–34. doi:10.1016/j.cvex.2007.09.007
Interesantemente la pancreatectomía afecta de forma
diferente a pájaros granívoros (diabetes transitoria) y
carnívoros
Los pájaros carnívoros se comportan igual que los
mamíferos (desarrollan diabetes tras pancreatectomía)
¿Nuestra anatomía y fisiología pancreática se ha adaptado
completamente en 10,000 a los cereales?
Chimpanzee Australopithecine
Modern human
Estas adaptaciones a una dieta nueva tardaron mucho más
de 10,000 años
Ungar, P. S. American Journal of Physical Anthropology, 2011
Aiello, L. C., & Wheeler, P. Current Anthropology, 1995
En términos evolutivos se
hablan en cientos de miles o
millones de años
Hancock,AM, et al. PNAS. 2010
Adaptación en poblaciones que dependen de los
cereales (en rojo)
Pancreatic lipase-related protein 2
Hancock,AM, et al. PNAS. 2010
Adaptación en poblaciones que dependen de los
cereales (en rojo)
Pancreatic lipase-related protein 2
Parece que estamos en un proceso de adaptación, y que
muchos no están adaptados al mirar ciertos SNPs
Estamos en un proceso de adaptación teniendo en cuenta
algunos haplotipos
No obstante, estos genes confieren susceptibiliad, no son
la causa
Si se evitan los factores ambientales la diabetes tipo 2 no
se manifiesta
Evidencia sobre el consumo (esporádico) de
legumbres en el paleolítico superior
Jones M. Moving North:Archaeobotanical Evidence for Plant Diet in Middle and Upper Paleolithic Europe. Dordrecht: Springer Netherlands; 2009;(Chapter 12):171–80.
Savard M, Nesbitt M, Jones MK.The role of wild grasses in subsistence and sedentism: new evidence from the northern Fertile Crescent.World Archaeology. 2006.
Lev E, Kislev ME, Bar-Yosef O. Mousterian vegetal food in Kebara cave, Mt. Carmel. Journal of Archaeological Science. 2005.
¿Pero a que rama de nuestra filogenética afecta?
Humanos
modernos
Agricultura
¿Pero a que rama de nuestra filogenética afecta?
¿Y el resto?
Humanos
modernos
Agricultura
¿Esto es normal?
Entendiendo la biología, genética y antropología lo normal sería que
no estamos adaptados y habría que demostrar que sí estamos
adaptados
Desafortunadamente, ese paradigma no se tiene en cuenta en la
nutrición y J.H. Kellogg tiene más influencia que Charles Darwin
Estudios ecológicos en poblaciones que no comen cereales/
lácteos
Aparente ausencia de
ECV, diabetes u obesidad
Lindeberg S. Food and Western Disease: Health and nutrition from an evolutionary perspective. 1st ed.
Wiley-Blackwell; 2010.
Teoría: los seres humanos modernos deberían estar
adaptados a la dieta que tuvieron durante 2.6 millones de
años
Esto es ciencia
Hipótesis nula: una dieta paleolítica no produce efectos
diferentes a una dieta con cereales y lácteos
H0: μ1 = μ2
Hipótesis alternativa: una dieta paleolítica si produce
efectos diferentes a una dieta con cereales y lácteos
H1: μ1 ≠ μ2
...pues vamos a refutar la hipótesis nula, si no la puedo
refutar tendré que aceptar la hipótesis alternativa
Estudio Población Duración Variables con
cambios signif.
Lindeberg S, 2007
29 sujetos EIC &
intolerancia glucosa
3 meses
Glucosa-TTOG, peso y
cintura
Österdahl M, 2008 14 sujetos sanos 3 semanas
Peso, IMC, cintura,
presión arterial y PAI-1
Jönsson T, 2009
13 sujetos con
diabetes tipo 2: diseño
cruzado
3 meses
HbA1c,TG, PA
diastólica, peso, IMC, p.
Cintura y HDL
Frassetto L, 2010 8 sujetos sanos 17 días
PA, insulina TTOG, colesterol
total, LDL,TG
Ryberg M, 2013
10 mujeres obesas
sanas
5 semanas
49% TG hepáticos, peso, IMC,
cintura, cadera, diámetro sagital
abdominal, glucosa, PA
diastólica,TG, colesterol, etc
Frassetto L, 2013
13 sujetos con
diabetes tipo 2
14 días Excreción ácida neta
Mellberg S, 2014 70 mujeres obesas 2 años
Masa grasa, peso corporal,
circunferencia cintura,
diámetro sagital abdominal
y TG
Frassetto L (no
publicado)
22 sujetos sanos 15 días
Glucosa en ayunas,
fructosamina, PCR
Estudios de intervención
Estudio Población Duración Variables con
cambios signif.
Lindeberg S, 2007
29 sujetos EIC &
intolerancia glucosa
3 meses
Glucosa-TTOG, peso y
cintura
Österdahl M, 2008 14 sujetos sanos 3 semanas
Peso, IMC, cintura,
presión arterial y PAI-1
Jönsson T, 2009
13 sujetos con
diabetes tipo 2: diseño
cruzado
3 meses
HbA1c,TG, PA
diastólica, peso, IMC, p.
Cintura y HDL
Frassetto L, 2010 8 sujetos sanos 17 días
PA, insulina TTOG, colesterol
total, LDL,TG
Ryberg M, 2013
10 mujeres obesas
sanas
5 semanas
49% TG hepáticos, peso, IMC,
cintura, cadera, diámetro sagital
abdominal, glucosa, PA
diastólica,TG, colesterol, etc
Frassetto L, 2013
13 sujetos con
diabetes tipo 2
14 días Excreción ácida neta
Mellberg S, 2014 70 mujeres obesas 2 años
Masa grasa, peso corporal,
circunferencia cintura,
diámetro sagital abdominal
y TG
Frassetto L (no
publicado)
22 sujetos sanos 15 días
Glucosa en ayunas,
fructosamina, PCR
Estudios de intervención
Estudios controlados
300
600
900
1200
Mmol/Lxmin
1104 1145
877
1024
807
1065
Baseline
Week 6
Week 12
Baseline
Week 6
Week 12
Paleolithic
Consensus
Área bajo la curva Glucosa 0-120 min
Paleolítica vs. mediterránea
Lindeberg, S., et al. Diabetologia. 2007
a a
b
b
a
a
P = 0.001
Empeoramiento!!
Mejoría
86.00
88.75
91.50
94.25
97.00
Kg
91.70
96.10
88.00
93.60
86.70
92.20
Baseline
Week 6
Week 12
Baseline
Week 6
Week 12
Paleolithic
Consensus
Peso corporal
Paleolítica vs. mediterránea
Lindeberg, S., et al. Diabetologia. 2007
100
102
104
105
107
cm
105.8
106.6
102.8
105.2
100.2
103.6
Baseline
Week 6
Week 12
Baseline
Week 6
Week 12
Paleolithic
Consensus
Circunferencia de cintura
Lindeberg, S., et al. Diabetologia. 2007
a
a
b
b
c
c
P = 0.03
Paleolítica vs. mediterránea
Food Paleolithic Consensus p value
Fruits (g) 493 ± 335 252 ± 179 0.03
Nuts (g) 11 ± 12 2 ± 6 0.02
Cereals
without rice (g)
18 ± 52 268 ± 96 0.0001
Milk/dairy (g) 45 ± 119 287 ± 193 0.0006
Oil, margarine 1 ± 3 16 ± 11 0.0001
Diferencias de alimentosLindeberg, S., et al. Diabetologia. 2007
Paleolítica vs. mediterránea
Paleolítica vs. mediterránea
Lindeberg S, et al. Diabetologia. 2007
CHO
40%
PRO
28%
FAT
27%
4%
Paleolítica
CHO
52%
PRO
21%
FAT
25%
2%
Mediterránea
Fibra = 21 g Fibra = 27 g
Composición macronutrientes
Alcohol
Volvamos a la dieta mediterránea...
Lindeberg S, et al. Diabetologia. 2007
Texto
¿Por qué considerar la evolución en nutrición?
¿Por qué considerar la evolución en nutrición?
¿Por qué considerar la evolución en nutrición?
¿Por qué considerar la evolución en nutrición?
¿Por qué considerar la evolución en nutrición?
¿Por qué considerar la evolución en nutrición?
¿Por qué considerar la evolución en nutrición?
¿Por qué considerar la evolución en nutrición?
¿Por qué considerar la evolución en nutrición?
¿Por qué considerar la evolución en nutrición?
¿Por qué considerar la evolución en nutrición?
¿Por qué considerar la evolución en nutrición?
¿Por qué considerar la evolución en nutrición?
¿Por qué considerar la evolución en nutrición?
¿Por qué considerar la evolución en nutrición?
¿Por qué considerar la evolución en nutrición?
¿Por qué considerar la evolución en nutrición?
¿Por qué considerar la evolución en nutrición?
¿Por qué considerar la evolución en nutrición?
¿Por qué considerar la evolución en nutrición?
¿Por qué considerar la evolución en nutrición?
¿Por qué considerar la evolución en nutrición?
¿Por qué considerar la evolución en nutrición?
¿Por qué considerar la evolución en nutrición?
¿Por qué considerar la evolución en nutrición?
¿Por qué considerar la evolución en nutrición?
¿Por qué considerar la evolución en nutrición?
¿Por qué considerar la evolución en nutrición?
¿Por qué considerar la evolución en nutrición?
¿Por qué considerar la evolución en nutrición?
¿Por qué considerar la evolución en nutrición?
¿Por qué considerar la evolución en nutrición?
¿Por qué considerar la evolución en nutrición?
¿Por qué considerar la evolución en nutrición?

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¿Por qué considerar la evolución en nutrición?

  • 1. Maelán Fontes, MS Center for Primary Health Care Research Lund University, Sweden ¿Por qué considerar la evolución en nutrición?
  • 3. Recomendaciones nutricionales actuales Dietary Guidelines for Americans U.S. Department of Agriculture U.S. Department of Health and Human Services www.dietaryguidelines.gov
  • 5. S. Graham J.H. Kellogg Battle Creek M. Bircher-Benner W.Arbuthnot-Lane D. Burkitt Leyendas
  • 8. Teoría: asociación entre grasa y muerte por ECV Ancel Keys YERUSHALMY, J., & HILLEBOE, H. E. (1957). NewYork State Journal of Medicine, Keys,A. (1953). Journal of the Mount Sinai Hospital, NewYork Keys,A.., et al. (1986). American Journal of Epidemiology,
  • 9. Menor mortalidad en países mediterraneos (seven countries study group) Observación YERUSHALMY, J., & HILLEBOE, H. E. (1957). NewYork State Journal of Medicine, Keys,A. (1953). Journal of the Mount Sinai Hospital, NewYork
  • 10. Sofi, F., Cesari, F.,Abbate, R., Gensini, G.F. & Casini,A. (2008) Adherence to Mediterranean diet and health status: meta-analysis. BMJ 337, a1344. Reducción del 9% en mortalidad por riesgo CVD por cada 2 puntos de adherencia a la dieta mediterránea Meta-análisis 514.816 sujetos Seguimiento 3-18 años La epidemiología lo deja claro
  • 11. Pero también estaba claro para la terapia hormonal sustitutiva “Overall, the bulk of the evidence strongly supports a protective effect of estrogens that is unlikely to be explained by confounding factors”. Stampfer, M. J., & Colditz, G.A. (1991). Preventive Medicine.
  • 12. Pero un RCT demostró aumento del riesgo de enfermedad coronaria, cáncer de mama, ictus, embolismo pulmonar = riesgos superan a los beneficios Rossouw, J. E., et al. (2002). Jama,
  • 13. Lo mismo con la vitamina C Epidemiología = asociación inversa Davey Smith et al, Int J Epidemiol 2003;32:1
  • 14. Lo mismo con la vitamina C Intervención = aumento mortalidad Davey Smith et al, Int J Epidemiol 2003;32:1
  • 15. Lo mismo con la vitamina C Intervención = aumento mortalidad !!! Davey Smith et al, Int J Epidemiol 2003;32:1
  • 16. Lo mismo con la vitamina C Intervención = aumento mortalidad !!! Davey Smith et al, Int J Epidemiol 2003;32:1
  • 17. Base de las recomendaciones: epidemiología !!!
  • 18. Base de las recomendaciones: epidemiología !!!
  • 19. Base de las recomendaciones: epidemiología !!!
  • 20. Base de las recomendaciones: epidemiología !!!
  • 21. Base de las recomendaciones: epidemiología !!!
  • 22. Base de las recomendaciones: epidemiología !!! Muy pocos hablan de esto
  • 23. Base de las recomendaciones: epidemiología !!! Muy pocos hablan de esto ¿O la epidemiología no cuenta en este caso?
  • 25. Más epidemiología Mientras los estudios de cohorte han demostrado consistentemente este efecto protector de los cereales integrales, sólo ha habido un estudio de intervención aleatorizado controlado en la prevención secundaria recomendando consumir más fibra de cereales. En éste no hubo reducción del índice de reinfarto. El estudio tenía algunas limitaciones, por ejemplo, había ocho dietas diferentes, no se comprobó la adherencia de forma objetiva, y la duración fue sólo 2 años.
  • 26. Romanticismo por los compuestos bioactivos En ese mismo artículo: Truswell,A. S. (2002). European Journal of Clinical Nutrition
  • 27. Romanticismo por los compuestos bioactivos En ese mismo artículo: In people who consume relatively large amounts of whole grain cereals these phytoestrogens in adults may have a protective effect against hormone-related cancers (the structure of enterodiol is similar to that of tamoxifen). Truswell,A. S. (2002). European Journal of Clinical Nutrition
  • 28. Romanticismo por los compuestos bioactivos En ese mismo artículo: In people who consume relatively large amounts of whole grain cereals these phytoestrogens in adults may have a protective effect against hormone-related cancers (the structure of enterodiol is similar to that of tamoxifen). ¿Efecto protectivo? ¿Por qué no perjudicial al unirse a receptores estrogénicos? Truswell,A. S. (2002). European Journal of Clinical Nutrition
  • 29. Romanticismo por los compuestos bioactivos En ese mismo artículo: In people who consume relatively large amounts of whole grain cereals these phytoestrogens in adults may have a protective effect against hormone-related cancers (the structure of enterodiol is similar to that of tamoxifen). ¿Efecto protectivo? ¿Por qué no perjudicial al unirse a receptores estrogénicos? Se ha demostrado en animales que los fitoestrógenos de la dieta producen infertilidad (Jefferson,WN. et al. Reproduction. 2012;143(3): 247 Truswell,A. S. (2002). European Journal of Clinical Nutrition
  • 30. Romanticismo por los compuestos bioactivos ¿Las plantas producen compuestos bioactivos para protegernos a nosotros o para protegerse de nosotros? En ese mismo artículo: In people who consume relatively large amounts of whole grain cereals these phytoestrogens in adults may have a protective effect against hormone-related cancers (the structure of enterodiol is similar to that of tamoxifen). ¿Efecto protectivo? ¿Por qué no perjudicial al unirse a receptores estrogénicos? Se ha demostrado en animales que los fitoestrógenos de la dieta producen infertilidad (Jefferson,WN. et al. Reproduction. 2012;143(3): 247 Truswell,A. S. (2002). European Journal of Clinical Nutrition
  • 31. Desde un punto de vista de la biología y botánica está claro Wink M.Annual Plant Reviews, Functions and Biotechnology of Plant Secondary Metabolites (Volume 39, 2). 39th ed.Wiley-Blackwell; 2010.
  • 32. Wink M.Annual Plant Reviews, Functions and Biotechnology of Plant Secondary Metabolites (Volume 39, 2). 39th ed.Wiley-Blackwell; 2010. Desde un punto de vista de la biología y botánica está claro
  • 33. Todas las plantas poseen compuestos bioactivos cuya función es protegerse de los depredadores Los cereales, legumbres y semillas tienen mayor concentración, y son más problemáticos para nosotros, que las verduras, tubérculos o frutas Lindeberg S. Food and Western Disease: Health and nutrition from an evolutionary perspective. 1st ed. Wiley-Blackwell; 2010.
  • 34. Mensaje: elegir las plantas a las que mejor adaptados estemos (hace muchos millones de años que comemos fruta y los compuestos están en la semilla, no pulpa) y variar el consumo para disminuir la exposición al mismo compuesto bioactivo
  • 35. Estudios de larga duración testando el efecto de cereales en hard-end points Pero volvamos a los cereales
  • 36. Efectos de la fibra de cereales en el reinfarto de miocardio 2033 hombres seguidos durante casi 2 años Aumento no significativo de la mortalidad Burr ML, Fehily AM, Gilbert JF, et al. Lancet 1989; 2:757-761.
  • 37. Efectos de la fibra de cereales en el reinfarto de miocardio 2033 hombres seguidos durante casi 2 años Ness,A. Et al. (2002). European Journal of Clinical Nutrition
  • 38. Efectos de la fibra de cereales en el reinfarto de miocardio 2033 hombres seguidos durante casi 2 años Pero tras ajuste estadístico si hay aumento significativo en EIC y casi significativo en mortalidad total en los dos primeros años! Ness,A. Et al. (2002). European Journal of Clinical Nutrition
  • 39. Efectos de la fibra de cereales en el reinfarto de miocardio 2033 hombres seguidos durante casi 2 años Pero tras ajuste estadístico si hay aumento significativo en EIC y casi significativo en mortalidad total en los dos primeros años! Ness,A. Et al. (2002). European Journal of Clinical Nutrition
  • 40. Estudio de intervención Women’s Health Initiative Intervention Modification Trial 48,835 mujeres postmenopáusicas Intervención 19,541 29,294 Control 8 años Modificación intensa de la conducta Material educativo relacionado con dieta Howard, B.V., et al. JAMA: the Journal of the American Medical Association, 2006
  • 41. Estudio de intervención Women’s Health Initiative Intervention Modification Trial 48,835 mujeres postmenopáusicas Intervención 19,541 29,294 Control 8 años Reducir la grasa a <20%en, 5 raciones de fruta/verdura y >6 raciones de cereales integrales al día Material educativo relacionado con dieta Howard, B.V., et al. JAMA: the Journal of the American Medical Association, 2006
  • 42. Estudio de intervención Women’s Health Initiative Intervention Modification Trial 48,835 mujeres postmenopáusicas Howard, B.V., et al. JAMA: the Journal of the American Medical Association, 2006
  • 43. Estudio de intervención Women’s Health Initiative Intervention Modification Trial 48,835 mujeres postmenopáusicas Howard, B.V., et al. JAMA: the Journal of the American Medical Association, 2006 No redujo el riesgo de enfermedad coronaria, ictus o ECV
  • 44. Estudio de intervención Women’s Health Initiative Intervention Modification Trial 48,835 mujeres postmenopáusicas Howard, B.V., et al. JAMA: the Journal of the American Medical Association, 2006
  • 45. Estudio de intervención Women’s Health Initiative Intervention Modification Trial 48,835 mujeres postmenopáusicas Howard, B.V., et al. JAMA: the Journal of the American Medical Association, 2006 Si miramos la letra pequeña...y escondida, vemos lo siguiente
  • 46. Howard, B.V., et al. JAMA: the Journal of the American Medical Association, 2006 Women’s Health Initiative Intervention Modification Trial Probablemente las frutas/verduras no fueron un problema...
  • 47. Howard BV, et al. JAMA:The Journal of the American Medical Association 2006 Aumento del riesgo relativo de ECV a 8 años en grupo de intervención 0 5 10 15 20 25 26 3.4% mujeres con ECV al inicio Low-fat/high fiber diet Women’s Health Initiative Intervention Modification Trial
  • 48. Women’s Health Initiative Intervention Modification Trial Shikany, J. M., et al. (2011). American Journal of Clinical Nutrition Control de glucosa en diabéticas
  • 49. Women’s Health Initiative Intervention Modification Trial Shikany, J. M., et al. (2011). American Journal of Clinical Nutrition Control de glucosa en diabéticas
  • 50. Women’s Health Initiative Intervention Modification Trial Shikany, J. M., et al. (2011). American Journal of Clinical Nutrition Control de glucosa en diabéticas Empeoramiento significativo del control de glucosa en el grupo de intervención en las mujeres con diabetes tipo 2 al inicio del estudio
  • 51. The Journal of Nutrition Nutrition and Disease Whole-Grain Foods Do Not Affect Insulin Sensitivity or Markers of Lipid Peroxidation and Inflammation in Healthy, Moderately Overweight Subjects1,2 Agneta Andersson,3 * Siv Tengblad,3 Brita Karlstro¨m,3 Afaf Kamal-Eldin,4 Rikard Landberg,4 Samar Basu,3 Per A˚ man,4 and Bengt Vessby3 3 Clinical Nutrition and Metabolism, Department of Public Health and Caring Sciences, Uppsala University, 751 85 Uppsala, Sweden and 4 Department of Food Science, the Swedish University of Agriculture Sciences (SLU), 750 07 Uppsala, Sweden Abstract High intakes of whole grain foods are inversely related to the incidence of coronary heart diseases and type 2 diabetes, but the mechanisms remain unclear. Our study aimed to evaluate the effects of a diet rich in whole grains compared with a diet containing the same amount of refined grains on insulin sensitivity and markers of lipid peroxidation and inflammation. In a randomized crossover study, 22 women and 8 men (BMI 28 6 2) were given either whole-grain or refined-grain products (3 bread slices, 2 crisp bread slices, 1 portion muesli, and 1 portion pasta) to include in their habitual daily diet for two 6-wk periods. Peripheral insulin sensitivity was determined by euglycemic hyperinsulinemic clamp tests. 8-Iso-prostaglandin F2a (8-iso PGF2a), an F2-isoprostane, was measured in the urine as a marker of lipid peroxidation, and highly sensitive C-reactive protein and IL-6 were analyzed in plasma as markers of inflammation. Peripheral insulin sensitivity [mg glucose Á kg body wt21 Á min21 per unit plasma insulin (mU/L) 3 100] did not improve when subjects consumed whole-grain products (6.8 6 3.0 at baseline and 6.5 6 2.7 after 6 wk) or refined products (6.4 6 2.9 and 6.9 6 3.2, respectively) and there were no differences between the 2 periods. Whole-grain consumption also did not affect 8-iso-PGF2a in urine, IL-6 and C-reactive protein in plasma, blood pressure, or serum lipid concentrations. In conclusion, substitution of whole grains (mainly based on milled wheat) for refined-grain products in the habitual daily diet of healthy moderately overweight adults for 6-wk did not affect insulin sensitivity or markers of lipid peroxidation and inflammation. J. Nutr. 137: 1401–1407, 2007. Introduction Whole-grain products are reported to have several positive effects on human health (1). An inverse, relatively strong correlation between the intake of whole grain foods (2–6) and fiber from grains (7–10), based mainly on FFQ and the incidence of coro- nary heart disease, is consistently shown in epidemiological studies of both men and women. In addition, recent studies have linked cereal fiber and whole-grain foods to a reduced risk of type 2 diabetes (11–16) and of the metabolic syndrome (6,17). These relations seem to be most striking among overweight subjects (11,18,19). The scientific evidence is considered sufficient to permit health claims regarding the cardio-protective effect of whole- grain products in many countries including the U.S., the U.K., and Sweden. The claims must, however, be set within the context of other lifestyle factors such as exercise and healthy eating habits in general (1). Despite indications that whole grain foods may beneficially influence glucose and lipid metabolism, knowledge of how biological mechanisms contribute to the health effects of whole grain remain weak. Several bioactive components, such as die- tary fiber, vitamins, minerals, antioxidants, and other phyto- protectants in whole grain may act synergistically to lower the risk of chronic diseases (20,21). Insulin resistance and oxidative stress are both important factors in the pathogenesis of type 2 diabetes and cardiovascular diseases (22–25) and may poten- byguestonFebruary9,2011jn.nutrition.orgDownloadedfrom Overweight Subjects1,2 Agneta Andersson,3 * Siv Tengblad,3 Brita Karlstro¨m,3 Afaf Kamal-Eldin,4 Rikard Landberg,4 Samar Basu,3 Per A˚ man,4 and Bengt Vessby3 3 Clinical Nutrition and Metabolism, Department of Public Health and Caring Sciences, Uppsala University, 751 85 Uppsala, Sweden and 4 Department of Food Science, the Swedish University of Agriculture Sciences (SLU), 750 07 Uppsala, Sweden Abstract High intakes of whole grain foods are inversely related to the incidence of coronary heart diseases and type 2 diabetes, but the mechanisms remain unclear. Our study aimed to evaluate the effects of a diet rich in whole grains compared with a diet containing the same amount of refined grains on insulin sensitivity and markers of lipid peroxidation and inflammation. In a randomized crossover study, 22 women and 8 men (BMI 28 6 2) were given either whole-grain or refined-grain products (3 bread slices, 2 crisp bread slices, 1 portion muesli, and 1 portion pasta) to include in their habitual daily diet for two 6-wk periods. Peripheral insulin sensitivity was determined by euglycemic hyperinsulinemic clamp tests. 8-Iso-prostaglandin F2a (8-iso PGF2a), an F2-isoprostane, was measured in the urine as a marker of lipid peroxidation, and highly sensitive C-reactive protein and IL-6 were analyzed in plasma as markers of inflammation. Peripheral insulin sensitivity [mg glucose Á kg body wt21 Á min21 per unit plasma insulin (mU/L) 3 100] did not improve when subjects consumed whole-grain products (6.8 6 3.0 at baseline and 6.5 6 2.7 after 6 wk) or refined products (6.4 6 2.9 and 6.9 6 3.2, respectively) and there were no differences between the 2 periods. Whole-grain consumption also did not affect 8-iso-PGF2a in urine, IL-6 and C-reactive protein in plasma, blood pressure, or serum lipid concentrations. In conclusion, substitution of whole grains (mainly based on milled wheat) for refined-grain products in the habitual daily diet of healthy moderately overweight adults for 6-wk did not affect insulin sensitivity or markers of lipid peroxidation and inflammation. J. Nutr. 137: 1401–1407, 2007. Introduction Whole-grain products are reported to have several positive effects on human health (1). An inverse, relatively strong correlation between the intake of whole grain foods (2–6) and fiber from grain products in many countries including and Sweden. The claims must, however, be se of other lifestyle factors such as exercise and h in general (1). TABLE 5 BMI, blood pressure, and blood chemistry of all participants before and after 6 wk consuming whole-grain or refined-grain diets1 Whole-grain period Refined-grain period Before After Before After P-value treatment effect2 n 30 30 30 30 BMI, kg/m2 28.5 6 2.4 28.8 6 2.5a 28.4 6 2.1 28.6 6 2.1 0.046 Fasting blood glucose, mmol/L 5.2 6 0.8 5.3 6 0.8 5.2 6 0.9 5.2 6 0.8 0.28 Fasting insulin, pmol/L 56.2 6 22.9 57.6 6 24.3 60.4 6 30.6 57.6 6 25.7 0.47 Insulin sensitivity,3 M 5.9 6 2.1 5.5 6 1.7 5.7 6 1.9 6.0 6 2.0 0.24 M/I 6.8 6 3.0 6.5 6 2.7 6.4 6 2.9 6.9 6 3.2 0.79 Total cholesterol, mmol/L 5.5 6 0.7 5.5 6 0.7 5.5 6 0.8 5.5 6 0.7 0.76 HDL cholesterol, mmol/L 1.3 6 0.3 1.2 6 0.3 1.2 6 0.2 1.2 6 0.3 0.15 LDL cholesterol, mmol/L 3.7 6 0.8 3.7 6 0.7 3.7 6 0.8 3.6 6 0.7 0.40 TG cholesterol, mmol/L 1.4 6 0.8 1.5 6 0.8 1.3 6 0.6 1.6 6 1.0c 0.19 Free fatty acid, mmol/L 0.56 6 0.19 0.61 6 0.18 0.63 6 0.17 0.62 6 0.18 0.99 Systolic blood pressure, mm Hg 130 6 17 129 6 15 130 6 16 130 6 15 0.35* Diastolic blood pressure, mm Hg 81 6 9 81 6 8 80 6 10 81 6 9 0.60 8-iso-PGF2a, nmol/mmol creatinine 0.43 6 0.14 0.43 6 0.14 0.42 6 0.15 0.44 6 0.21 0.48 a-tocopherol, mmol/mmol lipid 4.68 6 0.72 4.78 6 0.61 4.38 6 1.07 4.64 6 0.61 0.08 g-tocopherol, mmol/mmol lipid 0.26 6 0.12 0.24 6 0.07 0.26 6 0.10 0.26 6 0.10 0.10 CRP, mg/L 2.03 6 1.62 2.38 6 2.29 2.86 6 2.96 2.34 6 1.57 0.55 IL-6, ng/L 14.8 6 32.2 15.2 6 33.2 15.9 6 32.4 15.8 6 30.9 0.79 PAI-1 activity, kU/L 24.7 6 15.8 26.9 6 20.3 24.8 6 19.9 22.1 6 19.5 0.26 1 Data are means 6 SD. 2 P-values (treatment effect) for differences between the whole-grain and refined-grain diet adjusted for changes in BMI. Differences within groups when compared to baseline: a P , 0.001; b P , 0.01; c P , 0.05. *Parallel group design, only from 1st diet period (because carryover Downloadedfrom J. Nutr. 137: 1401–1407, 2007.! Si diferencias entre los grupos! Cereales integrales y marcadores inflamación/ cardiovasculares
  • 52. The Journal of Nutrition Nutrition and Disease Whole-Grain Foods Do Not Affect Insulin Sensitivity or Markers of Lipid Peroxidation and Inflammation in Healthy, Moderately Overweight Subjects1,2 Agneta Andersson,3 * Siv Tengblad,3 Brita Karlstro¨m,3 Afaf Kamal-Eldin,4 Rikard Landberg,4 Samar Basu,3 Per A˚ man,4 and Bengt Vessby3 3 Clinical Nutrition and Metabolism, Department of Public Health and Caring Sciences, Uppsala University, 751 85 Uppsala, Sweden and 4 Department of Food Science, the Swedish University of Agriculture Sciences (SLU), 750 07 Uppsala, Sweden Abstract High intakes of whole grain foods are inversely related to the incidence of coronary heart diseases and type 2 diabetes, but the mechanisms remain unclear. Our study aimed to evaluate the effects of a diet rich in whole grains compared with a diet containing the same amount of refined grains on insulin sensitivity and markers of lipid peroxidation and inflammation. In a randomized crossover study, 22 women and 8 men (BMI 28 6 2) were given either whole-grain or refined-grain products (3 bread slices, 2 crisp bread slices, 1 portion muesli, and 1 portion pasta) to include in their habitual daily diet for two 6-wk periods. Peripheral insulin sensitivity was determined by euglycemic hyperinsulinemic clamp tests. 8-Iso-prostaglandin F2a (8-iso PGF2a), an F2-isoprostane, was measured in the urine as a marker of lipid peroxidation, and highly sensitive C-reactive protein and IL-6 were analyzed in plasma as markers of inflammation. Peripheral insulin sensitivity [mg glucose Á kg body wt21 Á min21 per unit plasma insulin (mU/L) 3 100] did not improve when subjects consumed whole-grain products (6.8 6 3.0 at baseline and 6.5 6 2.7 after 6 wk) or refined products (6.4 6 2.9 and 6.9 6 3.2, respectively) and there were no differences between the 2 periods. Whole-grain consumption also did not affect 8-iso-PGF2a in urine, IL-6 and C-reactive protein in plasma, blood pressure, or serum lipid concentrations. In conclusion, substitution of whole grains (mainly based on milled wheat) for refined-grain products in the habitual daily diet of healthy moderately overweight adults for 6-wk did not affect insulin sensitivity or markers of lipid peroxidation and inflammation. J. Nutr. 137: 1401–1407, 2007. Introduction Whole-grain products are reported to have several positive effects on human health (1). An inverse, relatively strong correlation between the intake of whole grain foods (2–6) and fiber from grains (7–10), based mainly on FFQ and the incidence of coro- nary heart disease, is consistently shown in epidemiological studies of both men and women. In addition, recent studies have linked cereal fiber and whole-grain foods to a reduced risk of type 2 diabetes (11–16) and of the metabolic syndrome (6,17). These relations seem to be most striking among overweight subjects (11,18,19). The scientific evidence is considered sufficient to permit health claims regarding the cardio-protective effect of whole- grain products in many countries including the U.S., the U.K., and Sweden. The claims must, however, be set within the context of other lifestyle factors such as exercise and healthy eating habits in general (1). Despite indications that whole grain foods may beneficially influence glucose and lipid metabolism, knowledge of how biological mechanisms contribute to the health effects of whole grain remain weak. Several bioactive components, such as die- tary fiber, vitamins, minerals, antioxidants, and other phyto- protectants in whole grain may act synergistically to lower the risk of chronic diseases (20,21). Insulin resistance and oxidative stress are both important factors in the pathogenesis of type 2 diabetes and cardiovascular diseases (22–25) and may poten- byguestonFebruary9,2011jn.nutrition.orgDownloadedfrom Overweight Subjects1,2 Agneta Andersson,3 * Siv Tengblad,3 Brita Karlstro¨m,3 Afaf Kamal-Eldin,4 Rikard Landberg,4 Samar Basu,3 Per A˚ man,4 and Bengt Vessby3 3 Clinical Nutrition and Metabolism, Department of Public Health and Caring Sciences, Uppsala University, 751 85 Uppsala, Sweden and 4 Department of Food Science, the Swedish University of Agriculture Sciences (SLU), 750 07 Uppsala, Sweden Abstract High intakes of whole grain foods are inversely related to the incidence of coronary heart diseases and type 2 diabetes, but the mechanisms remain unclear. Our study aimed to evaluate the effects of a diet rich in whole grains compared with a diet containing the same amount of refined grains on insulin sensitivity and markers of lipid peroxidation and inflammation. In a randomized crossover study, 22 women and 8 men (BMI 28 6 2) were given either whole-grain or refined-grain products (3 bread slices, 2 crisp bread slices, 1 portion muesli, and 1 portion pasta) to include in their habitual daily diet for two 6-wk periods. Peripheral insulin sensitivity was determined by euglycemic hyperinsulinemic clamp tests. 8-Iso-prostaglandin F2a (8-iso PGF2a), an F2-isoprostane, was measured in the urine as a marker of lipid peroxidation, and highly sensitive C-reactive protein and IL-6 were analyzed in plasma as markers of inflammation. Peripheral insulin sensitivity [mg glucose Á kg body wt21 Á min21 per unit plasma insulin (mU/L) 3 100] did not improve when subjects consumed whole-grain products (6.8 6 3.0 at baseline and 6.5 6 2.7 after 6 wk) or refined products (6.4 6 2.9 and 6.9 6 3.2, respectively) and there were no differences between the 2 periods. Whole-grain consumption also did not affect 8-iso-PGF2a in urine, IL-6 and C-reactive protein in plasma, blood pressure, or serum lipid concentrations. In conclusion, substitution of whole grains (mainly based on milled wheat) for refined-grain products in the habitual daily diet of healthy moderately overweight adults for 6-wk did not affect insulin sensitivity or markers of lipid peroxidation and inflammation. J. Nutr. 137: 1401–1407, 2007. Introduction Whole-grain products are reported to have several positive effects on human health (1). An inverse, relatively strong correlation between the intake of whole grain foods (2–6) and fiber from grain products in many countries including and Sweden. The claims must, however, be se of other lifestyle factors such as exercise and h in general (1). TABLE 5 BMI, blood pressure, and blood chemistry of all participants before and after 6 wk consuming whole-grain or refined-grain diets1 Whole-grain period Refined-grain period Before After Before After P-value treatment effect2 n 30 30 30 30 BMI, kg/m2 28.5 6 2.4 28.8 6 2.5a 28.4 6 2.1 28.6 6 2.1 0.046 Fasting blood glucose, mmol/L 5.2 6 0.8 5.3 6 0.8 5.2 6 0.9 5.2 6 0.8 0.28 Fasting insulin, pmol/L 56.2 6 22.9 57.6 6 24.3 60.4 6 30.6 57.6 6 25.7 0.47 Insulin sensitivity,3 M 5.9 6 2.1 5.5 6 1.7 5.7 6 1.9 6.0 6 2.0 0.24 M/I 6.8 6 3.0 6.5 6 2.7 6.4 6 2.9 6.9 6 3.2 0.79 Total cholesterol, mmol/L 5.5 6 0.7 5.5 6 0.7 5.5 6 0.8 5.5 6 0.7 0.76 HDL cholesterol, mmol/L 1.3 6 0.3 1.2 6 0.3 1.2 6 0.2 1.2 6 0.3 0.15 LDL cholesterol, mmol/L 3.7 6 0.8 3.7 6 0.7 3.7 6 0.8 3.6 6 0.7 0.40 TG cholesterol, mmol/L 1.4 6 0.8 1.5 6 0.8 1.3 6 0.6 1.6 6 1.0c 0.19 Free fatty acid, mmol/L 0.56 6 0.19 0.61 6 0.18 0.63 6 0.17 0.62 6 0.18 0.99 Systolic blood pressure, mm Hg 130 6 17 129 6 15 130 6 16 130 6 15 0.35* Diastolic blood pressure, mm Hg 81 6 9 81 6 8 80 6 10 81 6 9 0.60 8-iso-PGF2a, nmol/mmol creatinine 0.43 6 0.14 0.43 6 0.14 0.42 6 0.15 0.44 6 0.21 0.48 a-tocopherol, mmol/mmol lipid 4.68 6 0.72 4.78 6 0.61 4.38 6 1.07 4.64 6 0.61 0.08 g-tocopherol, mmol/mmol lipid 0.26 6 0.12 0.24 6 0.07 0.26 6 0.10 0.26 6 0.10 0.10 CRP, mg/L 2.03 6 1.62 2.38 6 2.29 2.86 6 2.96 2.34 6 1.57 0.55 IL-6, ng/L 14.8 6 32.2 15.2 6 33.2 15.9 6 32.4 15.8 6 30.9 0.79 PAI-1 activity, kU/L 24.7 6 15.8 26.9 6 20.3 24.8 6 19.9 22.1 6 19.5 0.26 1 Data are means 6 SD. 2 P-values (treatment effect) for differences between the whole-grain and refined-grain diet adjusted for changes in BMI. Differences within groups when compared to baseline: a P , 0.001; b P , 0.01; c P , 0.05. *Parallel group design, only from 1st diet period (because carryover Downloadedfrom J. Nutr. 137: 1401–1407, 2007.! Si diferencias entre los grupos! Cereales integrales y marcadores inflamación/ cardiovasculares Sin diferencias significativas entre cereales integrales y refinados
  • 53. Effect of Wheat Bran on Glycemic Control and Risk Factors for Cardiovascular Disease in Type 2 Diabetes DAVID J. A. JENKINS, MD 1,2,3,4 CYRIL W. C. KENDALL, PHD 1,3 LIVIA S. A. AUGUSTIN, MSC 1,3 MARGARET C. MARTINI, PHD 5 METTE AXELSEN, PHD 6 DOROTHEA FAULKNER, RD 1 EDWARD VIDGEN, BSC 1,3 TINA PARKER, RD 1 HERB LAU, MD 7,8 PHILIP W. CONNELLY, PHD 2,9,10 JEROME TEITEL, MD 7,8 WILLIAM SINGER, MD 2 ARTHUR C. VANDENBROUCKE, PHD 7,10 LAWRENCE A. LEITER, MD 1,2,3,4 ROBERT G. JOSSE, MD 1,2,3,4 OBJECTIVE — Cohort studies indicate that cereal fiber reduces the risk of diabetes and coronary heart disease (CHD). Therefore, we assessed the effect of wheat bran on glycemic control and CHD risk factors in type 2 diabetes. RESEARCH DESIGN AND METHODS — A total of 23 subjects with type 2 diabetes (16 men and 7 postmenopausal women) completed two 3-month phases of a randomized crossover study. In the test phase, bread and breakfast cereals were provided as products high in cereal fiber (19 g/day additional cereal fiber). In the control phase, supplements were low in fiber (4 g/day additional cereal fiber). RESULTS — Between the test and control treatments, no differences were seen in body weight, fasting blood glucose, HbA1c, serum lipids, apolipoproteins, blood pressure, serum uric acid, clotting factors, homocysteine, C-reactive protein, magnesium, calcium, iron, or ferritin. LDL oxidation in the test phase was higher than that seen in the control phase (12.1 Ϯ 5.4%, P Ͻ 0.034). Of the subjects originally recruited, more dropped out of the study for health and food preference reasons from the control phase (16 subjects) than the test phase (11 subjects). CONCLUSIONS — High-fiber cereal foods did not improve conventional markers of glyce- mic control or risk factors for CHD in type 2 diabetes over 3 months. Possibly longer studies are required to demonstrate the benefits of cereal fiber. Alternatively, cereal fiber in the diet may be a marker for another component of whole grains that imparts health advantages or a healthy lifestyle. Diabetes Care 25:1522–1528, 2002 T here is much interest in the possible health benefits of fiber-containing cereals (1–3). The exact component or facet of fiber that is responsible has not been clearly defined, and there are indi- cations that the whole grain confers met- abolic benefits (4) and reduces the risk of chronic disease (1,5,6). The results of large cohort studies have suggested that wheat fiber protects against the develop- ment of diabetes (1–3). Many diabetes as- sociations advise increased fiber intake, either to improve glycemic control (7) or to confer general health benefits (8). In- creases in fiber from a variety of dietary sources have been shown to improve gly- cemic control in type 2 diabetes (9). Early studies suggested that cereal fiber im- proved both glycemic control in diabetes (10) and glucose tolerance in nondiabetic subjects (11). The reason for the benefi- cial effects of nonviscous cereal fiber is not clear. Cereal fibers do not reduce the rate of gastric emptying and small intestinal absorption or flatten the postprandial gly- cemic response to a high-carbohydrate test meal (12). In contrast, viscous fibers such as guar and pectin have been shown to reduce the rate of gastric emptying (13) and small intestinal absorption (14), thereby providing a mechanism for po- tential benefits. These fibers have been shown to reduce postprandial glycemia when added to test meals. They also de- crease 24-h urinary glucose losses when added to the diets of subjects with type 2 diabetes (15). Furthermore, it is wheat fiber, rather than viscous fiber, that for more than two decades has been shown consistently in cohort studies to be associated with a re- duced risk of heart disease (5,6,16,17). These effects are seen despite the fact that viscous fibers from oats, barley, psyllium, pectins, and guar gum have been shown to lower serum cholesterol and improve the blood lipid profile, whereas the insol- ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● From the 1 Clinical Nutrition and Risk Factor Modification Center, St. Michael’s Hospital, Toronto, Ontario, Canada; the 2 Department of Medicine, Division of Endocrinology and Metabolism, St. Michael’s Hospital, Toronto, Ontario, Canada; the 3 Department of Nutritional Sciences, Faculty of Medicine, University of Toronto, Toronto, Ontario, Canada; the 4 Department of Medicine, Faculty of Medicine, University of Toronto, Toronto, Ontario, Canada; 5 Kraft Foods, Glenview, Illinois; the 6 Lundberg Laboratory for Diabetic Research, Department of Internal Medicine, Sahlgrenska University Hospital, Go¨teborg, Sweden; the 7 De- partment of Laboratory Medicine, Division of Clinical Biochemistry, St. Michael’s Hospital, Toronto, On- tario, Canada; the 8 Department of Hematology, St. Michael’s Hospital, Toronto, Ontario, Canada; the 9 Department of Biochemistry, Faculty of Medicine, University of Toronto, Toronto, Ontario, Canada; and the 10 Department of Laboratory Medicine and Pathobiology, Faculty of Medicine, University of Toronto, Toronto, Ontario, Canada. Address correspondence and reprint requests to David J. A. Jenkins, Clinical Nutrition and Risk Factor Modification Center, St. Michael’s Hospital, 61 Queen St. East, Toronto, Ontario, Canada, M5C 2T2. E-mail: C l i n i c a l C a r e / E d u c a t i o n / N u t r i t i o n O R I G I N A L A R T I C L E METTE AXELSEN, PHD DOROTHEA FAULKNER, RD 1 EDWARD VIDGEN, BSC 1,3 TINA PARKER, RD 1 ARTHUR C. VANDENBROUCKE, PHD 7,10 LAWRENCE A. LEITER, MD 1,2,3,4 ROBERT G. JOSSE, MD 1,2,3,4 OBJECTIVE — Cohort studies indicate that cereal fiber reduces the risk of diabetes and coronary heart disease (CHD). Therefore, we assessed the effect of wheat bran on glycemic control and CHD risk factors in type 2 diabetes. RESEARCH DESIGN AND METHODS — A total of 23 subjects with type 2 diabetes (16 men and 7 postmenopausal women) completed two 3-month phases of a randomized crossover study. In the test phase, bread and breakfast cereals were provided as products high in cereal fiber (19 g/day additional cereal fiber). In the control phase, supplements were low in fiber (4 g/day additional cereal fiber). RESULTS — Between the test and control treatments, no differences were seen in body weight, fasting blood glucose, HbA1c, serum lipids, apolipoproteins, blood pressure, serum uric acid, clotting factors, homocysteine, C-reactive protein, magnesium, calcium, iron, or ferritin. LDL oxidation in the test phase was higher than that seen in the control phase (12.1 Ϯ 5.4%, P Ͻ 0.034). Of the subjects originally recruited, more dropped out of the study for health and food preference reasons from the control phase (16 subjects) than the test phase (11 subjects). CONCLUSIONS — High-fiber cereal foods did not improve conventional markers of glyce- mic control or risk factors for CHD in type 2 diabetes over 3 months. Possibly longer studies are required to demonstrate the benefits of cereal fiber. Alternatively, cereal fiber in the diet may be a marker for another component of whole grains that imparts health advantages or a healthy lifestyle. Diabetes Care 25:1522–1528, 2002 been clearly de cations that the abolic benefits chronic diseas large cohort st wheat fiber pro ment of diabete sociations advi either to impro to confer gener creases in fiber sources have be cemic control in studies sugges proved both gly (10) and glucos subjects (11). T cial effects of no clear. Cereal fib of gastric emp absorption or fl cemic respons test meal (12). such as guar an to reduce the ra and small int thereby provid tential benefits shown to redu when added to crease 24-h uri MARGARET C. MARTINI, PHD 5 METTE AXELSEN, PHD 6 DOROTHEA FAULKNER, RD 1 EDWARD VIDGEN, BSC 1,3 TINA PARKER, RD 1 WILLIAM SINGER, MD 2 ARTHUR C. VANDENBROUCKE, PHD 7,10 LAWRENCE A. LEITER, MD 1,2,3,4 ROBERT G. JOSSE, MD 1,2,3,4 OBJECTIVE — Cohort studies indicate that cereal fiber reduces the risk of diabetes and coronary heart disease (CHD). Therefore, we assessed the effect of wheat bran on glycemic control and CHD risk factors in type 2 diabetes. RESEARCH DESIGN AND METHODS — A total of 23 subjects with type 2 diabetes (16 men and 7 postmenopausal women) completed two 3-month phases of a randomized crossover study. In the test phase, bread and breakfast cereals were provided as products high in cereal fiber (19 g/day additional cereal fiber). In the control phase, supplements were low in fiber (4 g/day additional cereal fiber). RESULTS — Between the test and control treatments, no differences were seen in body weight, fasting blood glucose, HbA1c, serum lipids, apolipoproteins, blood pressure, serum uric acid, clotting factors, homocysteine, C-reactive protein, magnesium, calcium, iron, or ferritin. LDL oxidation in the test phase was higher than that seen in the control phase (12.1 Ϯ 5.4%, P Ͻ 0.034). Of the subjects originally recruited, more dropped out of the study for health and food preference reasons from the control phase (16 subjects) than the test phase (11 subjects). CONCLUSIONS — High-fiber cereal foods did not improve conventional markers of glyce- mic control or risk factors for CHD in type 2 diabetes over 3 months. Possibly longer studies are required to demonstrate the benefits of cereal fiber. Alternatively, cereal fiber in the diet may be a marker for another component of whole grains that imparts health advantages or a healthy lifestyle. Diabetes Care 25:1522–1528, 2002 Tor facet of fiber been clearly de cations that the abolic benefits ( chronic disease large cohort stu wheat fiber pro ment of diabete sociations advis either to improv to confer gener creases in fiber sources have be cemic control in studies suggest proved both gly (10) and glucos subjects (11). T cial effects of no clear. Cereal fib of gastric empt absorption or fla cemic response test meal (12). such as guar an to reduce the ra and small inte thereby providi tential benefits. shown to redu when added to LIVIA S. A. AUGUSTIN, MSC MARGARET C. MARTINI, PHD 5 METTE AXELSEN, PHD 6 DOROTHEA FAULKNER, RD 1 EDWARD VIDGEN, BSC 1,3 TINA PARKER, RD 1 JEROME TEITEL, MD WILLIAM SINGER, MD 2 ARTHUR C. VANDENBROUCKE, PHD 7,10 LAWRENCE A. LEITER, MD 1,2,3,4 ROBERT G. JOSSE, MD 1,2,3,4 OBJECTIVE — Cohort studies indicate that cereal fiber reduces the risk of diabetes and coronary heart disease (CHD). Therefore, we assessed the effect of wheat bran on glycemic control and CHD risk factors in type 2 diabetes. RESEARCH DESIGN AND METHODS — A total of 23 subjects with type 2 diabetes (16 men and 7 postmenopausal women) completed two 3-month phases of a randomized crossover study. In the test phase, bread and breakfast cereals were provided as products high in cereal fiber (19 g/day additional cereal fiber). In the control phase, supplements were low in fiber (4 g/day additional cereal fiber). RESULTS — Between the test and control treatments, no differences were seen in body weight, fasting blood glucose, HbA1c, serum lipids, apolipoproteins, blood pressure, serum uric acid, clotting factors, homocysteine, C-reactive protein, magnesium, calcium, iron, or ferritin. LDL oxidation in the test phase was higher than that seen in the control phase (12.1 Ϯ 5.4%, P Ͻ 0.034). Of the subjects originally recruited, more dropped out of the study for health and food preference reasons from the control phase (16 subjects) than the test phase (11 subjects). CONCLUSIONS — High-fiber cereal foods did not improve conventional markers of glyce- mic control or risk factors for CHD in type 2 diabetes over 3 months. Possibly longer studies are required to demonstrate the benefits of cereal fiber. Alternatively, cereal fiber in the diet may be a marker for another component of whole grains that imparts health advantages or a healthy lifestyle. Diabetes Care 25:1522–1528, 2002 Tcereals (1– or facet of fiber been clearly de cations that the abolic benefits chronic diseas large cohort stu wheat fiber pro ment of diabete sociations advi either to impro to confer gener creases in fiber sources have be cemic control in studies sugges proved both gly (10) and glucos subjects (11). T cial effects of no clear. Cereal fib of gastric empt absorption or fl cemic response test meal (12). such as guar an to reduce the ra and small int thereby provid tential benefits shown to redu Jenkins D, et al. Diabetes Care 25:1522–1528, 2002! Cereales integrales y marcadores inflamación/ cardiovasculares
  • 54. Effect of Wheat Bran on Glycemic Control and Risk Factors for Cardiovascular Disease in Type 2 Diabetes DAVID J. A. JENKINS, MD 1,2,3,4 CYRIL W. C. KENDALL, PHD 1,3 LIVIA S. A. AUGUSTIN, MSC 1,3 MARGARET C. MARTINI, PHD 5 METTE AXELSEN, PHD 6 DOROTHEA FAULKNER, RD 1 EDWARD VIDGEN, BSC 1,3 TINA PARKER, RD 1 HERB LAU, MD 7,8 PHILIP W. CONNELLY, PHD 2,9,10 JEROME TEITEL, MD 7,8 WILLIAM SINGER, MD 2 ARTHUR C. VANDENBROUCKE, PHD 7,10 LAWRENCE A. LEITER, MD 1,2,3,4 ROBERT G. JOSSE, MD 1,2,3,4 OBJECTIVE — Cohort studies indicate that cereal fiber reduces the risk of diabetes and coronary heart disease (CHD). Therefore, we assessed the effect of wheat bran on glycemic control and CHD risk factors in type 2 diabetes. RESEARCH DESIGN AND METHODS — A total of 23 subjects with type 2 diabetes (16 men and 7 postmenopausal women) completed two 3-month phases of a randomized crossover study. In the test phase, bread and breakfast cereals were provided as products high in cereal fiber (19 g/day additional cereal fiber). In the control phase, supplements were low in fiber (4 g/day additional cereal fiber). RESULTS — Between the test and control treatments, no differences were seen in body weight, fasting blood glucose, HbA1c, serum lipids, apolipoproteins, blood pressure, serum uric acid, clotting factors, homocysteine, C-reactive protein, magnesium, calcium, iron, or ferritin. LDL oxidation in the test phase was higher than that seen in the control phase (12.1 Ϯ 5.4%, P Ͻ 0.034). Of the subjects originally recruited, more dropped out of the study for health and food preference reasons from the control phase (16 subjects) than the test phase (11 subjects). CONCLUSIONS — High-fiber cereal foods did not improve conventional markers of glyce- mic control or risk factors for CHD in type 2 diabetes over 3 months. Possibly longer studies are required to demonstrate the benefits of cereal fiber. Alternatively, cereal fiber in the diet may be a marker for another component of whole grains that imparts health advantages or a healthy lifestyle. Diabetes Care 25:1522–1528, 2002 T here is much interest in the possible health benefits of fiber-containing cereals (1–3). The exact component or facet of fiber that is responsible has not been clearly defined, and there are indi- cations that the whole grain confers met- abolic benefits (4) and reduces the risk of chronic disease (1,5,6). The results of large cohort studies have suggested that wheat fiber protects against the develop- ment of diabetes (1–3). Many diabetes as- sociations advise increased fiber intake, either to improve glycemic control (7) or to confer general health benefits (8). In- creases in fiber from a variety of dietary sources have been shown to improve gly- cemic control in type 2 diabetes (9). Early studies suggested that cereal fiber im- proved both glycemic control in diabetes (10) and glucose tolerance in nondiabetic subjects (11). The reason for the benefi- cial effects of nonviscous cereal fiber is not clear. Cereal fibers do not reduce the rate of gastric emptying and small intestinal absorption or flatten the postprandial gly- cemic response to a high-carbohydrate test meal (12). In contrast, viscous fibers such as guar and pectin have been shown to reduce the rate of gastric emptying (13) and small intestinal absorption (14), thereby providing a mechanism for po- tential benefits. These fibers have been shown to reduce postprandial glycemia when added to test meals. They also de- crease 24-h urinary glucose losses when added to the diets of subjects with type 2 diabetes (15). Furthermore, it is wheat fiber, rather than viscous fiber, that for more than two decades has been shown consistently in cohort studies to be associated with a re- duced risk of heart disease (5,6,16,17). These effects are seen despite the fact that viscous fibers from oats, barley, psyllium, pectins, and guar gum have been shown to lower serum cholesterol and improve the blood lipid profile, whereas the insol- ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● From the 1 Clinical Nutrition and Risk Factor Modification Center, St. Michael’s Hospital, Toronto, Ontario, Canada; the 2 Department of Medicine, Division of Endocrinology and Metabolism, St. Michael’s Hospital, Toronto, Ontario, Canada; the 3 Department of Nutritional Sciences, Faculty of Medicine, University of Toronto, Toronto, Ontario, Canada; the 4 Department of Medicine, Faculty of Medicine, University of Toronto, Toronto, Ontario, Canada; 5 Kraft Foods, Glenview, Illinois; the 6 Lundberg Laboratory for Diabetic Research, Department of Internal Medicine, Sahlgrenska University Hospital, Go¨teborg, Sweden; the 7 De- partment of Laboratory Medicine, Division of Clinical Biochemistry, St. Michael’s Hospital, Toronto, On- tario, Canada; the 8 Department of Hematology, St. Michael’s Hospital, Toronto, Ontario, Canada; the 9 Department of Biochemistry, Faculty of Medicine, University of Toronto, Toronto, Ontario, Canada; and the 10 Department of Laboratory Medicine and Pathobiology, Faculty of Medicine, University of Toronto, Toronto, Ontario, Canada. Address correspondence and reprint requests to David J. A. Jenkins, Clinical Nutrition and Risk Factor Modification Center, St. Michael’s Hospital, 61 Queen St. East, Toronto, Ontario, Canada, M5C 2T2. E-mail: C l i n i c a l C a r e / E d u c a t i o n / N u t r i t i o n O R I G I N A L A R T I C L E METTE AXELSEN, PHD DOROTHEA FAULKNER, RD 1 EDWARD VIDGEN, BSC 1,3 TINA PARKER, RD 1 ARTHUR C. VANDENBROUCKE, PHD 7,10 LAWRENCE A. LEITER, MD 1,2,3,4 ROBERT G. JOSSE, MD 1,2,3,4 OBJECTIVE — Cohort studies indicate that cereal fiber reduces the risk of diabetes and coronary heart disease (CHD). Therefore, we assessed the effect of wheat bran on glycemic control and CHD risk factors in type 2 diabetes. RESEARCH DESIGN AND METHODS — A total of 23 subjects with type 2 diabetes (16 men and 7 postmenopausal women) completed two 3-month phases of a randomized crossover study. In the test phase, bread and breakfast cereals were provided as products high in cereal fiber (19 g/day additional cereal fiber). In the control phase, supplements were low in fiber (4 g/day additional cereal fiber). RESULTS — Between the test and control treatments, no differences were seen in body weight, fasting blood glucose, HbA1c, serum lipids, apolipoproteins, blood pressure, serum uric acid, clotting factors, homocysteine, C-reactive protein, magnesium, calcium, iron, or ferritin. LDL oxidation in the test phase was higher than that seen in the control phase (12.1 Ϯ 5.4%, P Ͻ 0.034). Of the subjects originally recruited, more dropped out of the study for health and food preference reasons from the control phase (16 subjects) than the test phase (11 subjects). CONCLUSIONS — High-fiber cereal foods did not improve conventional markers of glyce- mic control or risk factors for CHD in type 2 diabetes over 3 months. Possibly longer studies are required to demonstrate the benefits of cereal fiber. Alternatively, cereal fiber in the diet may be a marker for another component of whole grains that imparts health advantages or a healthy lifestyle. Diabetes Care 25:1522–1528, 2002 been clearly de cations that the abolic benefits chronic diseas large cohort st wheat fiber pro ment of diabete sociations advi either to impro to confer gener creases in fiber sources have be cemic control in studies sugges proved both gly (10) and glucos subjects (11). T cial effects of no clear. Cereal fib of gastric emp absorption or fl cemic respons test meal (12). such as guar an to reduce the ra and small int thereby provid tential benefits shown to redu when added to crease 24-h uri MARGARET C. MARTINI, PHD 5 METTE AXELSEN, PHD 6 DOROTHEA FAULKNER, RD 1 EDWARD VIDGEN, BSC 1,3 TINA PARKER, RD 1 WILLIAM SINGER, MD 2 ARTHUR C. VANDENBROUCKE, PHD 7,10 LAWRENCE A. LEITER, MD 1,2,3,4 ROBERT G. JOSSE, MD 1,2,3,4 OBJECTIVE — Cohort studies indicate that cereal fiber reduces the risk of diabetes and coronary heart disease (CHD). Therefore, we assessed the effect of wheat bran on glycemic control and CHD risk factors in type 2 diabetes. RESEARCH DESIGN AND METHODS — A total of 23 subjects with type 2 diabetes (16 men and 7 postmenopausal women) completed two 3-month phases of a randomized crossover study. In the test phase, bread and breakfast cereals were provided as products high in cereal fiber (19 g/day additional cereal fiber). In the control phase, supplements were low in fiber (4 g/day additional cereal fiber). RESULTS — Between the test and control treatments, no differences were seen in body weight, fasting blood glucose, HbA1c, serum lipids, apolipoproteins, blood pressure, serum uric acid, clotting factors, homocysteine, C-reactive protein, magnesium, calcium, iron, or ferritin. LDL oxidation in the test phase was higher than that seen in the control phase (12.1 Ϯ 5.4%, P Ͻ 0.034). Of the subjects originally recruited, more dropped out of the study for health and food preference reasons from the control phase (16 subjects) than the test phase (11 subjects). CONCLUSIONS — High-fiber cereal foods did not improve conventional markers of glyce- mic control or risk factors for CHD in type 2 diabetes over 3 months. Possibly longer studies are required to demonstrate the benefits of cereal fiber. Alternatively, cereal fiber in the diet may be a marker for another component of whole grains that imparts health advantages or a healthy lifestyle. Diabetes Care 25:1522–1528, 2002 Tor facet of fiber been clearly de cations that the abolic benefits ( chronic disease large cohort stu wheat fiber pro ment of diabete sociations advis either to improv to confer gener creases in fiber sources have be cemic control in studies suggest proved both gly (10) and glucos subjects (11). T cial effects of no clear. Cereal fib of gastric empt absorption or fla cemic response test meal (12). such as guar an to reduce the ra and small inte thereby providi tential benefits. shown to redu when added to LIVIA S. A. AUGUSTIN, MSC MARGARET C. MARTINI, PHD 5 METTE AXELSEN, PHD 6 DOROTHEA FAULKNER, RD 1 EDWARD VIDGEN, BSC 1,3 TINA PARKER, RD 1 JEROME TEITEL, MD WILLIAM SINGER, MD 2 ARTHUR C. VANDENBROUCKE, PHD 7,10 LAWRENCE A. LEITER, MD 1,2,3,4 ROBERT G. JOSSE, MD 1,2,3,4 OBJECTIVE — Cohort studies indicate that cereal fiber reduces the risk of diabetes and coronary heart disease (CHD). Therefore, we assessed the effect of wheat bran on glycemic control and CHD risk factors in type 2 diabetes. RESEARCH DESIGN AND METHODS — A total of 23 subjects with type 2 diabetes (16 men and 7 postmenopausal women) completed two 3-month phases of a randomized crossover study. In the test phase, bread and breakfast cereals were provided as products high in cereal fiber (19 g/day additional cereal fiber). In the control phase, supplements were low in fiber (4 g/day additional cereal fiber). RESULTS — Between the test and control treatments, no differences were seen in body weight, fasting blood glucose, HbA1c, serum lipids, apolipoproteins, blood pressure, serum uric acid, clotting factors, homocysteine, C-reactive protein, magnesium, calcium, iron, or ferritin. LDL oxidation in the test phase was higher than that seen in the control phase (12.1 Ϯ 5.4%, P Ͻ 0.034). Of the subjects originally recruited, more dropped out of the study for health and food preference reasons from the control phase (16 subjects) than the test phase (11 subjects). CONCLUSIONS — High-fiber cereal foods did not improve conventional markers of glyce- mic control or risk factors for CHD in type 2 diabetes over 3 months. Possibly longer studies are required to demonstrate the benefits of cereal fiber. Alternatively, cereal fiber in the diet may be a marker for another component of whole grains that imparts health advantages or a healthy lifestyle. Diabetes Care 25:1522–1528, 2002 Tcereals (1– or facet of fiber been clearly de cations that the abolic benefits chronic diseas large cohort stu wheat fiber pro ment of diabete sociations advi either to impro to confer gener creases in fiber sources have be cemic control in studies sugges proved both gly (10) and glucos subjects (11). T cial effects of no clear. Cereal fib of gastric empt absorption or fl cemic response test meal (12). such as guar an to reduce the ra and small int thereby provid tential benefits shown to redu Jenkins D, et al. Diabetes Care 25:1522–1528, 2002! Cereales integrales y marcadores inflamación/ cardiovasculares Aumento de la oxidación del LDL durante la fase de consumo de salvado de trigo
  • 55. Resumen cereales integrales y ECV Epidemiología: protectores Intervención: sin efecto o posible aumento del riesgo (WHI & DART)
  • 56. Conclusiones de las revisiones sistemáticas sobre los cereales integrales
  • 57. Kelly, S. A. M., Summerbell, C. D., Brynes, A., Whittaker, V., & Frost, G. (2007). Wholegrain cereals for coronary heart disease. Cochrane Database of Systematic Reviews (Online), (2), CD005051. doi:10.1002/14651858.CD005051.pub2
  • 58. Priebe, M. G., van Binsbergen, J. J., deVos, R., &Vonk, R. J. (2008).Whole grain foods for the prevention of type 2 diabetes mellitus. Cochrane Database of Systematic Reviews (Online), (1), CD006061. doi: 10.1002/14651858.CD006061.pub2
  • 59. Lefevre, M., & Jonnalagadda, S. (2012). Effect of whole grains on markers of subclinical inflammation. Nutrition Reviews
  • 60. American Diabetes Association Statement Evert,A. B., Boucher, J. L., Cypress, M., Dunbar, S.A., Franz, M. J., Mayer-Davis, E. J., et al. (2014). Nutrition therapy recommendations for the management of adults with diabetes. Diabetes Care, 37 Suppl 1(Supplement_1), S120–43. doi:10.2337/dc14-S120
  • 61. American Diabetes Association Statement Evert,A. B., Boucher, J. L., Cypress, M., Dunbar, S.A., Franz, M. J., Mayer-Davis, E. J., et al. (2014). Nutrition therapy recommendations for the management of adults with diabetes. Diabetes Care, 37 Suppl 1(Supplement_1), S120–43. doi:10.2337/dc14-S120 Nada específico para los cereales
  • 62. The Swedish Council on Health Technology Assessment (Statens Beredning för medicinsk Utvärdering), www.sbu.se
  • 63. Evidencia de alta calidad No hay estudios, no hay recomendaciones Asplund, K., Axelsen, M., Berglund, G., & Berne, C. (2010). Dietary Treatment of Diabetes. SBU-Swedish Council on Health Technology Assessment.
  • 64. Evidencia de calidad moderada Dietas muy bajas en CHO vs. moderadas bajas en grasa (algo mejor efecto en A1c y peso en 12-14 meses) Dieta moderada baja en CHO (30-40% en) vs. dieta alta en CHO (50-60% en) (algo mejor efecto en HDL) Asplund, K., Axelsen, M., Berglund, G., & Berne, C. (2010). Dietary Treatment of Diabetes. SBU-Swedish Council on Health Technology Assessment. Alcohol (menor riesgo de ECV con consumo regular vs. no consumo) Café (menor riesgo de muerte por enf. Isquémica coronaria con >2 tazas/ día)
  • 65. Evidencia de baja calidad Verduras, legumbres, índice glucémico bajo, ’dieta mediterránea’ Pescado y omega-3 (en mujeres) Asplund, K., Axelsen, M., Berglund, G., & Berne, C. (2010). Dietary Treatment of Diabetes. SBU-Swedish Council on Health Technology Assessment.
  • 66. Evidencia de muy baja calidad Índice glucémico muy bajo, carga glucémica, dieta baja en grasa, etc. Asplund, K., Axelsen, M., Berglund, G., & Berne, C. (2010). Dietary Treatment of Diabetes. SBU-Swedish Council on Health Technology Assessment.
  • 67. No hay estudios de alta calidad para la diabetes Ajala, O., et al.American Journal of Clinical Nutrition, 2013 Livesey, G., et al.American Journal of Clinical Nutrition, 2013 Nield, L., et al. Cochrane database of systematic reviews. 2007 Priebe, M. G., et al. Cochrane database of systematic reviews. 2008
  • 68. Mente,A.,deKoning,L.,Shannon,H.S.& Anand,S.S.(2009) A systematic review of the evidence supporting a causal link between dietary factors and coronary heart disease. Arch Intern Med 169, 659–69. Faltan ensayos clínicos Aún en 2010, no había RCTs para muchas recomendaciones habituales, respecto al riesgo cardiovascular
  • 69. Mente,A.,deKoning,L.,Shannon,H.S.& Anand,S.S.(2009) A systematic review of the evidence supporting a causal link between dietary factors and coronary heart disease. Arch Intern Med 169, 659–69. Faltan ensayos clínicos Aún en 2010, no había RCTs para muchas recomendaciones habituales, respecto al riesgo cardiovascular
  • 70. American Institute for Cancer Research 11th Annual Research Conference on Diet, Nutrition and Cancer The Mediterranean Diets: What Is So Special about the Diet of Greece? The Scientific Evidence1 Artemis P. Simopoulos2 The Center for Genetics, Nutrition and Health, Washington, DC ABSTRACT The term “Mediterranean diet,” implying that all Mediterranean people have the same diet, is a misnomer. The countries around the Mediterranean basin have different diets, religions and cultures. Their diets differ in the amount of total fat, olive oil, type of meat and wine intake; milk vs. cheese; fruits and vegetables; and the rates of coronary heart disease and cancer, with the lower death rates and longer life expectancy occurring in Greece. Extensive studies on the traditional diet of Greece (the diet before 1960) indicate that the dietary pattern of Greeks consists of a high intake of fruits, vegetables (particularly wild plants), nuts and cereals mostly in the form of sourdough bread rather than pasta; more olive oil and olives; less milk but more cheese; more fish; less meat; and moderate amounts of wine, more so than other Mediterranean countries. Analyses of the dietary pattern of the diet of Crete shows a number of protective substances, such as selenium, glutathione, a balanced ratio of (n-6):(n-3) essential fatty acids (EFA), high amounts of fiber, antioxidants (especially resveratrol from wine and polyphenols from olive oil), vitamins E and C, some of which have been shown to be associated with lower risk of cancer, including cancer of the breast. These findings should serve as a strong incentive for the initiation of intervention trials that will test the effect of specific dietary patterns in the prevention and management of patients with cancer. J. Nutr. 131: 3065S–3073S, 2001. KEY WORDS: c diet of Crete c (n-3) fatty acids c wild plants c antioxidants c cancer c (n-6) fatty acids The health of the individual and the population in general is the result of interactions between genetics and a number of environmental factors. Nutrition is an environmental factor of major importance (1–4). Our genetic profile has not changed over the past 10,000 y, whereas major changes have taken place in our food supply and in energy expenditure and phys- ical activity (5–17). Today industrialized societies are charac- terized by the following: 1) an increase in energy intake and decrease in energy expenditure; 2) an increase in saturated fat, (n-6) fatty acids and trans fatty acids and a decrease in (n-3) fatty acid intake; 3) a decrease in complex carbohydrates and fiber intake; 4) an increase in cereal grains and a decrease in fruit and vegetable intake; and 5) a decrease in protein, anti- oxidant and calcium intake (5–17). Furthermore, the ratio of (n-6) to (n-3) fatty acids is 16.74:1, whereas during evolution it was 2–1:1 (Table 1, Fig. 1). Recent investigations of the dietary patterns and health status of the countries surrounding the Mediterranean basin clearly indicate major differences among them in both dietary intake and health status. Therefore, the term “Mediterranean diet” is a misnomer. There is not just one Mediterranean diet but in fact many Mediterranean diets (18), which is not surprising because the countries along the Mediterranean ba- sin have different religions, economic and cultural traditions and diets. Diets are influenced by religious habits, that is, Muslims do not eat pork or drink wine and other alcoholic drinks, whereas Greek Orthodox populations usually do not eat meat on Wednesdays and Fridays but drink wine, and so on. Although Greece and the Mediterranean countries are usually considered to be areas of medium-high death rates (14.0–18.0 per 1000 inhabitants), death rates on the island of Crete have been below this level continuously since before 1930 (19). No other area in the Mediterranean basin has had as low a death rate as Crete, according to data compiled by the United Nations in their demographic yearbook for 1948. It was 11.3–13.7 per 1000 inhabitants before World War II and ;10.6 in 1946–1948 (19). Cancer and heart disease caused almost three times as many deaths proportionally in the United States as in Crete (19). The diet of Crete represents the traditional diet of Greece before 1960. The Seven Coun- tries Study was the first to establish credible data on cardio- vascular disease prevalence rates in contrasting populations (United States, Finland, The Netherlands, Italy, former Yu- goslavia, Japan and Greece), with differences found on the order of 5- to 10-fold in coronary heart disease (20). In 1958, the field work started in Dalmatia in the former Yugoslavia. 1 Presented as part of the 11th Annual Research Conference on Diet, Nutrition and Cancer held in Washington, DC, July 16–17, 2001. This conference was sponsored by the American Institute for Cancer Research and was supported by the California Dried Plum Board, The Campbell Soup Company, General Mills, Lipton, Mead Johnson Nutritionals, Roche Vitamins Inc. and Vitasoy USA. Guest editors for this symposium publication were Ritva R. Butrum and Helen A. Norman, American Institute for Cancer Research, Washington, DC. 2 To whom correspondence should be addressed. E-mail: cgnh@bellatlantic.net 0022-3166/01 $3.00 © 2001 American Society for Nutritional Sciences. 3065S byonSeptember27,2006jn.nutrition.orgDownloadedfrom Artemis P. Simopoulos The Center for Genetics, Nutrition and Health, Washington, DC ABSTRACT The term “Mediterranean diet,” implying that all Mediterranean people have the same d misnomer. The countries around the Mediterranean basin have different diets, religions and cultures. Th differ in the amount of total fat, olive oil, type of meat and wine intake; milk vs. cheese; fruits and vegetab the rates of coronary heart disease and cancer, with the lower death rates and longer life expectancy occ Greece. Extensive studies on the traditional diet of Greece (the diet before 1960) indicate that the dietary of Greeks consists of a high intake of fruits, vegetables (particularly wild plants), nuts and cereals mostly in of sourdough bread rather than pasta; more olive oil and olives; less milk but more cheese; more fish; les and moderate amounts of wine, more so than other Mediterranean countries. Analyses of the dietary patte diet of Crete shows a number of protective substances, such as selenium, glutathione, a balanced (n-6):(n-3) essential fatty acids (EFA), high amounts of fiber, antioxidants (especially resveratrol from w polyphenols from olive oil), vitamins E and C, some of which have been shown to be associated with lowe cancer, including cancer of the breast. These findings should serve as a strong incentive for the initi intervention trials that will test the effect of specific dietary patterns in the prevention and management of with cancer. J. Nutr. 131: 3065S–3073S, 2001. KEY WORDS: c diet of Crete c (n-3) fatty acids c wild plants c antioxidants c cancer c (n-6) fatt The health of the individual and the population in general is the result of interactions between genetics and a number of environmental factors. Nutrition is an environmental factor of major importance (1–4). Our genetic profile has not changed over the past 10,000 y, whereas major changes have taken place in our food supply and in energy expenditure and phys- ical activity (5–17). Today industrialized societies are charac- terized by the following: 1) an increase in energy intake and decrease in energy expenditure; 2) an increase in saturated fat, (n-6) fatty acids and trans fatty acids and a decrease in (n-3) fatty acid intake; 3) a decrease in complex carbohydrates and fiber intake; 4) an increase in cereal grains and a decrease in fruit and vegetable intake; and 5) a decrease in protein, anti- oxidant and calcium intake (5–17). Furthermore, the ratio of (n-6) to (n-3) fatty acids is 16.74:1, whereas during evolution it was 2–1:1 (Table 1, Fig. 1). Recent investigations of the dietary patterns and health status of the countries surrounding the Mediterranean basin clearly indicate major differences among them in both dietary intake and health status. Therefore, the term diet” is a misnomer. There is not just one Me but in fact many Mediterranean diets (18 surprising because the countries along the M sin have different religions, economic and c and diets. Diets are influenced by religious Muslims do not eat pork or drink wine and drinks, whereas Greek Orthodox population eat meat on Wednesdays and Fridays but dri on. Although Greece and the Mediterrane usually considered to be areas of medium-h (14.0–18.0 per 1000 inhabitants), death rates Crete have been below this level continuou 1930 (19). No other area in the Mediterrane as low a death rate as Crete, according to data United Nations in their demographic yearb was 11.3–13.7 per 1000 inhabitants before W ;10.6 in 1946–1948 (19). Cancer and hea almost three times as many deaths propo ¿Existe una dieta mediterránea?
  • 71. ¿Existe una dieta mediterránea? El pan sourdough no contiene gluten, si la pasta...entre otras diferencias
  • 72. FESNAD-SEEDO. (2011). Recomendaciones nutricionales basadas en la evidencia para la prevención y el tratamiento del sobrepeso y la obesidad en adultos (Consenso FESNAD- SEEDO). Revista Española De Obesidad, 19(1), 1–80.
  • 73. FESNAD-SEEDO. (2011). Recomendaciones nutricionales basadas en la evidencia para la prevención y el tratamiento del sobrepeso y la obesidad en adultos (Consenso FESNAD- SEEDO). Revista Española De Obesidad, 19(1), 1–80.
  • 74. FESNAD-SEEDO. (2011). Recomendaciones nutricionales basadas en la evidencia para la prevención y el tratamiento del sobrepeso y la obesidad en adultos (Consenso FESNAD- SEEDO). Revista Española De Obesidad, 19(1), 1–80.
  • 75. FESNAD-SEEDO. (2011). Recomendaciones nutricionales basadas en la evidencia para la prevención y el tratamiento del sobrepeso y la obesidad en adultos (Consenso FESNAD- SEEDO). Revista Española De Obesidad, 19(1), 1–80.
  • 76. Grado de recomendación para las dietas mediterráneas y vegetarianas, y cereales integrales en la prevención de la obesidad: C
  • 77. ¿Y el estudio PREDIMED? Mejor que una dieta low-fat (parecida a WHI) y además con un sesgo importante: falta de apoyo en grupo control
  • 78. ¿Y el estudio PREDIMED? Mejor que una dieta low-fat (parecida a WHI) y además con un sesgo importante: falta de apoyo en grupo control
  • 79. ¿Y el estudio PREDIMED? Mejor que una dieta low-fat (parecida a WHI) y además con un sesgo importante: falta de apoyo en grupo control
  • 80. ¿Y el estudio PREDIMED? Mejor que una dieta low-fat (parecida a WHI) y además con un sesgo importante: falta de apoyo en grupo control Recuerden resultados del WHI
  • 81. ¿Y el estudio PREDIMED? ¿Los cereales integrales jugaron un papel en los efectos? Mejor que una dieta low-fat (parecida a WHI) y además con un sesgo importante: falta de apoyo en grupo control
  • 82. ¿Y el estudio PREDIMED? Estruch R, et al. N Engl J Med. 2013 Estamos de acuerdo que la dieta mediterránea es mejor que la dieta occidental: no significa que sea necesariamente la mejor dieta para el ser humano
  • 83. ¿Y el Lyon Diet Heart Study? de Lorgeril, M., Salen, P., Martin, J. L., Monjaud, I., Delaye, J., & Mamelle, N. (1999). Mediterranean diet, traditional risk factors, and the rate of cardiovascular complications after myocardial infarction: final report of the Lyon Diet Heart Study. Circulation, 99(6), 779–785.
  • 84. ¿Y el Lyon Diet Heart Study? de Lorgeril, M., Salen, P., Martin, J. L., Monjaud, I., Delaye, J., & Mamelle, N. (1999). Mediterranean diet, traditional risk factors, and the rate of cardiovascular complications after myocardial infarction: final report of the Lyon Diet Heart Study. Circulation, 99(6), 779–785. Mejor que dieta low-fat ...pero Una vez más, el grupo control recibió menos apoyo conductual
  • 85. 0 0.5 1.0 1.5 Non-westerner Westerner with “low” risk Westerner with “normal” risk Westerner with “high” risk Riesgo relativo de las enf. de la civilización Riesgos relativos Lindeberg S. Food and Western Disease. 1st ed.Wiley-Blackwell; 2010.
  • 86. 0 0.5 1.0 1.5 Non-westerner Westerner with “low” risk Westerner with “normal” risk Westerner with “high” risk Riesgo relativo de las enf. de la civilización Riesgos relativos Lindeberg S. Food and Western Disease. 1st ed.Wiley-Blackwell; 2010. La mayoría de dietas se aplican en individuos con alto riesgo con dietas control de eficacia dudosa
  • 87. Revisión sistemática sobre dieta Mediterránea en prevención primaria de ECV Rees, K.,. (2013). Cochrane Database Syst Rev.
  • 88. Revisión sistemática sobre dieta Mediterránea en prevención primaria de ECV Rees, K.,. (2013). Cochrane Database Syst Rev. Importante: analizaron RCTs donde el grupo control no recibió intervención o era mínima (más motivación en grupo de dieta mediterránea)
  • 89. Revisión sistemática sobre dieta Mediterránea en prevención primaria de ECV Rees, K.,. (2013). Cochrane Database Syst Rev. Importante: analizaron RCTs donde el grupo control no recibió intervención o era mínima (más motivación en grupo de dieta mediterránea)
  • 90. Revisión sistemática sobre dieta Mediterránea en prevención primaria de ECV Rees, K.,. (2013). Cochrane Database Syst Rev. Importante: analizaron RCTs donde el grupo control no recibió intervención o era mínima (más motivación en grupo de dieta mediterránea) Conclusión: evidencia limitada y necesidad de más (y mejores) estudios
  • 91. Está bien pasar de riesgo alto a normal ...pero, ¿Quién quiere ser normal?
  • 92. La soja (legumbre y proteína vegetal) es mejor que la caseína1 Pero la caseína produce aterosclerosis, resistencia a la insulina y lipotoxicidad en experimentos animales1,2,3,4,5 1.Ascencio, C., et al. (2004). J Nutr 2. Huff,M.W., et al.(1982).Atherosclerosis 3. Lavigne, C., et al. (2001).Am J Physiol Endocrinol Metab 4.Wilson,T.A., et al. (2000). Nutr Res 5. Kritchevsky, D. (1995). J Nutr Además, la proteína animal (bisonte y ternera), produce mucha menos aterosclerosis que la proteína de soja4 Ejemplo del problema de la dieta control si no tenemos en cuenta la evolución En experimentos animales ¿Se puede concluir que la soja es beneficiosa?
  • 93. High-Milk Supplementation with Healthy Diet Counseling Does not Affect Weight Loss but Ameliorates Insulin Action Compared with Low-Milk Supplementation in Overweight Children1–3 Marie-Pierre St-Onge,4,5 * Laura Lee T. Goree,5 and Barbara Gower5 4 College of Physicians and Surgeons, Columbia University and New York Obesity Research Center, St. Luke’s/Roosevelt Hospital, New York, NY 10025 and 5 Department of Nutrition Sciences, University of Alabama, Birmingham, AL 35294 Abstract Milk consumption has decreased in children over the past years. This may play a role in the prevalence of pediatric obesity, because clinical studies have found a beneficial effect of milk consumption for weight management. The objectives of this study were to test whether high-milk consumption leads to greater weight loss and improvements in metabolic risk factors than low milk consumption during a 16-wk healthy eating diet. Overweight children aged 8–10 y were randomized to either high (4 3 236 mL/d) or low (1 3 236 mL/d) milk consumption. Children were provided dietary counseling on healthy eating at baseline and at wk 1, 2, 4, 6, 8, and 12. Serum glucose, insulin, and lipids were measured in fasting children at baseline and wk 8 and 16. An oral glucose tolerance test and body composition assessment by magnetic resonance imaging were conducted at baseline and endpoint. Body weight changes during the16-wk study not differ between the high-milk (1.3 6 0.3 kg) and low-milk (1.1 6 0.3 kg) groups. There was no beverage 3 week interaction on any of the body composition and metabolic variables studied (blood pressure, serum lipids, glucose, and insulin). There was a beverage 3 week interaction (P ¼ 0.044) on insulin area under the curve showing a trend toward reduced insulin output with a glucose challenge after high-milk consumption (P ¼ 0.062). These data suggest that in overweight children, high- milk consumption in conjunction with a healthy diet does not lead to greater weight loss but may ameliorate insulin action compared with low-milk consumption. J. Nutr. 139: 933–938, 2009. Introduction There is increasing concern regarding beverage type consump- tion in U.S. children. Recent epidemiological studies have pared with 8.3 and 20.6%, respectively, in the 1999–2001 national survey (5). These changes in beverage consumption patterns may have atColoradoStUnivLibonApril16,2009jn.nutrition.orgDownloadedfrom Dieta rica en leche vs. Dieta en la que la leche fue sustituida por una bebida con azúcar Sin alteraciones de la insulinemia de ayunas Respuesta insulinémica post-prandial estadísticamente menor en el grupo de la dieta rica en leche
  • 94. Stancliffe, R.A., et al. (2011). American Journal of Clinical Nutrition Texto Dieta control: lácteos sustituidos por carne procesada, sustitutos de carne basada en soja, fruta, cereales y galletas con mantequilla de cacahuete Texto Idem con muchos estudios con cereales integrales y legumbres: dieta control no adecuada o falta de apoyo
  • 95. Look AHEAD Research Group,Wing, R. R., Bolin, P., Brancati, F. L., Bray, G.A., Clark, J. M., et al. (2013). The New England Journal of Medicine Look AHEAD 5,145 diabéticos con obesidad Intervención Control Dieta hipocalórica/<30% grasa/>15% proteína/ cereales integrales + 175 min ejercicio/semana Educación y apoyo sobre diabetes (otra vez menos apoyo en grupo control) Otro estudio de larga duración
  • 96. Look AHEAD Research Group,Wing, R. R., Bolin, P., Brancati, F. L., Bray, G.A., Clark, J. M., et al. (2013). The New England Journal of Medicine Look AHEAD
  • 97. Look AHEAD Research Group,Wing, R. R., Bolin, P., Brancati, F. L., Bray, G.A., Clark, J. M., et al. (2013). The New England Journal of Medicine Look AHEAD Tras 9,6 años, y con pérdida de peso (6%) y reducción de HbA1c, ninguna diferencia en muerte por ECV, infarto de miocardio no fatal, ictus no fatal u hospitalización por angina Por lo tanto, ¿hasta qué punto me puedo fiar de los biomarcadores?
  • 98. Cerhan JR, et al. Mayo Clin Proc. 2014 Circunferencia de cintura y riesgo de mortalidad en 650.000 adultos
  • 99. Cerhan JR, et al. Mayo Clin Proc. 2014 Circunferencia de cintura y riesgo de mortalidad en 650.000 adultos Todos tenemos un riesgo normal (1.0), pero lo normal sería tener un riesgo 0, como en poblaciones de cazadores-recolectores Por lo tanto, si no se considera la evolución a la hora de diseñar estudios de intervención, pasar de riesgo 1.8 a 1.3 está “bien”
  • 100. Los estudios Women’s Health Initiative, PREDIMED y Look AHEAD dejan claro que seguir una dieta saludable no es suficiente
  • 101. Conclusión: no existe suficiente evidencia para recomendar los cereales integrales en la prevención y el tratamiento de ECV, diabetes u obesidad Howard, B.V., et al. JAMA: the Journal of the American Medical Association, 2006 Burr, M. L., Fehily,A. M., Gilbert, J. F., Rogers, S., Holliday, R. M., Sweetnam, P. M., et al. (1989). Effects of changes in fat, fish, and fibre intakes on death and myocardial reinfarction: diet and reinfarction trial (DART). Lancet, 2(8666), 757–761. Kelly, S.A. M., Summerbell, C. D., Brynes,A.,Whittaker,V., & Frost, G. (2007).Wholegrain cereals for coronary heart disease. Cochrane Database of Systematic Reviews (Online), (2), CD005051. doi:10.1002/14651858.CD005051.pub2 Priebe, M. G., van Binsbergen, J. J., deVos, R., &Vonk, R. J. (2008).Whole grain foods for the prevention of type 2 diabetes mellitus. Cochrane Database of Systematic Reviews (Online), (1), CD006061. doi:10.1002/14651858.CD006061.pub2 Lefevre, M., & Jonnalagadda, S. (2012). Effect of whole grains on markers of subclinical inflammation. Nutrition Reviews Evert,A. B., Boucher, J. L., Cypress, M., Dunbar, S.A., Franz, M. J., Mayer-Davis, E. J., et al. (2014). Nutrition therapy recommendations for the management of adults with diabetes. Diabetes Care, 37 Suppl 1(Supplement_1), S120–43. doi:10.2337/dc14-S120 Asplund, K.,Axelsen, M., Berglund, G., & Berne, C. (2010). Dietary Treatment of Diabetes. SBU-Swedish Council on HealthTechnology Assessment. FESNAD-SEEDO. (2011). Recomendaciones nutricionales basadas en la evidencia para la prevención y el tratamiento del sobrepeso y la obesidad en adultos (Consenso FESNAD- SEEDO). Revista Española De Obesidad, 19(1), 1–80.
  • 102. ¿Por qué considerar la evolución? Lindeberg S. Food and Western Disease. 1st ed.Wiley-Blackwell; 2010. vs. Ideología Biología Es sorprendente que J.H. Kellogg tenga más influencia en la nutrición que Charles Darwin
  • 103. Eaton, S. B., & Konner, M. (1985). Paleolithic nutrition.A consideration of its nature and current implications. The New England Journal of Medicine, Este artículo hizo pensar a algunos curiosos
  • 104. Wood, B. Proc Natl Acad Sci USA, 2010 Agricultura: un periodo de tiempo infinitesimal a escala evolutiva Paleolítico Agricultura 0,4% de nuestra evolución
  • 105. Campbell, M. C., & Tishkoff, S. A. Annual Review of Genomics and Human Genetics, 2008 Todos venimos de un grupo de 1,000 individuos que vivieron en África hace 200,000 años
  • 106. Campbell, M. C., & Tishkoff, S. A. Annual Review of Genomics and Human Genetics, 2008 Todos venimos de un grupo de 1,000 individuos que vivieron en África hace 200,000 años Hasta este momento, todos teníamos la misma dieta
  • 108. ¿Qué comíamos? ¿Mejora esta dieta si añadimos cereales y lácteos? ¿Existen riesgos si consumimos estos alimentos?
  • 109. Lo conocido Dieta omnívora Lo incierto Cuanta cantidad de alimentos animal/vegetal Lo conocido No alimentos occidentales Cordain L. Implications of Plio-Pleistocene Hominin Diets for Modern Humans. In: Early Hominin Diets:The Known, the Unknown, and the Unknowable. Ungar, P (Ed.), Oxford University Press, Oxford, 2006, pp 363-83
  • 110. Aceites refinados Azúcar Sal Alcohol Lácteos Carnes procesadas Cereales Legumbres Alimentos occidentales
  • 111. Potenciales efectos negativos de compuestos bioactivos de los cereales Endocrinos Unión a receptores opioides: exorfinas A5 y B51, 2 Unión a receptores de insulina y leptina: lectinas3, 4 Unión a receptores de estrógenos: fitoestrógenos5 1. Schusdziarra, et al. (1981). Diabetes 2. SchusdziarraV, et al. Peptides 1984 3. Cuatrecasas, P., & Tell, G. P. (1973). Proceedings of the National Academy of Sciences of the United States of America 4. Jönsson T, et al. BMC Endocr Disord. 2005 5. Jefferson,W. N., et al. (2012). Reproduction 6. Cordain L. Br. J. Nutr. 2000 7. Junker,Y., et al. (2012).. Journal of Experimental Medicine 8. Unitt, J., & Hornigold, D. (2011). Biochemical Pharmacology 9.Visser, J., et al. (2009). Annals of the NewYork Academy of Sciences 10. Cordain, L. (1999). World Review of Nutrition and Dietetics 11. Pusztai,A., et al. (1993). British Journal of Nutrition 12. Sjölander,A., et al. (1984). International Archives of Allergy and Applied Immunology Inmunológicos Disruptores de membranas (glicocalix): lectinas6,12 Estimulación del sistema inmune innato: gliadina y lectinas7,8,9 Mimetismo molecular con autoantígenos6,10 Antinutrientes Acido fítico10 Lectinas N-acetilglucosamina específicas11
  • 112. Trigo, receptores opioides y glucagón Efectos de la misma cantidad de CHO en forma de glucosa o diferentes formas de trigo en la secreción de glucagón NOTA: no es aconsejable que se aumente la producción de glucagón en el estado posprandial (Unger RH, et al. J. Clin. Investig. 2012) Behall, K. M., et al. (1999). Journal of the American College of Nutrition, Un ejemplo
  • 113. Proteínas de la leche de vaca y diabetes tipo 1 Reducción significativa de marcadores de autoinmunidad para células beta con caseína hidrolizada vs. leche de fórmula a base de leche de vaca Knip, M., et al. (2010). New England Journal of Medicine
  • 114. Potenciales factores dietéticos en la diabetes tipo1 http://www.diapedia.org/type-1-diabetes-mellitus/environmental-factors Fuente: Diapedia.org
  • 115. Potenciales factores dietéticos en la diabetes tipo1 http://www.diapedia.org/type-1-diabetes-mellitus/environmental-factors No es evidencia de grado A, pero con los estudios de biología molecular y de animales, ¿por qué correr riesgos teniendo otros alimentos más seguros que cumplan los objetivos nutricionales? De nuevo, alimentos introducidos en el neolítico Fuente: Diapedia.org
  • 116. Los alimentos no son sólo macro y micronutrientes Que una alimentación cumpla los objetivos nutricionales no significa que sea óptima para la salud a largo plazo
  • 117. Selección natural ¿Qué hace falta? Presión selectiva ¿El consumo de cereales produce una presión selectiva negativa? ¿Son suficientes 10,000 años?...probablemente no.
  • 118. Persistencia de la lactasa de adulto Presión selectiva positiva muy fuerte porque mermaba la capacidad reproductiva en N-O de Europa (raquitismo) y África sub-sahariana (Malaria) https://s3.amazonaws.com/paleodietevo2/research/Malaria+and+Rickets+Represent+Selective+Forces+for+the+Convergent+Evolution+of+Adult+Lactase+Persistence+The+Paleo+Diet.pdf Referencia:
  • 119. Persistencia de la lactasa de adulto Presión selectiva positiva muy fuerte porque mermaba la capacidad reproductiva en N-O de Europa (raquitismo) y África sub-sahariana (Malaria) https://s3.amazonaws.com/paleodietevo2/research/Malaria+and+Rickets+Represent+Selective+Forces+for+the+Convergent+Evolution+of+Adult+Lactase+Persistence+The+Paleo+Diet.pdf Referencia: Y aún así todavía no todos (65%) estamos adaptados a digerir lactosa Nota importante: estar adaptado a digerir lactosa no significa estar adaptado a beber leche (proteínas)
  • 120. Perry GH, et al. Nat Genet 2007 Alfa amilasa salivar
  • 121. Perry GH, et al. Nat Genet 2007 Estar adaptado a comer más almidón no significa estar adaptado a comer cereales si tienes susceptibilidad a la celiaquía Alfa amilasa salivar
  • 122. ¿Estamos todos completamente adaptados a los cereales?
  • 123. ¿Estamos todos completamente adaptados a los cereales? La sensibilidad al gluten (no celiaquía) afecta a 6-10% población en el RU ¿Y que ocurre con las otras 40,000 proteínas del trigo?
  • 124. Cuestiones Si nos adaptáramos bien a los cereales en 10,000 años, en Oriente Medio habría menos prevalencia de celiaquía
  • 127. No es tan sencillo como decir, “10,000 es suficiente tiempo para adaptarnos, ¿Por qué razón no íbamos a adaptarnos?” Pues porque hace falta presión selectiva que merme capacidad reproductiva(concepto básico de biología evolutiva) Stearns, S. C., & Koella, J. C. (2008). Evolution in Health and Disease (2nd ed.). Oxford University Press, USA.
  • 128. No es tan sencillo como decir, “10,000 es suficiente tiempo para adaptarnos, ¿Por qué razón no íbamos a adaptarnos?” Pues porque hace falta presión selectiva que merme capacidad reproductiva(concepto básico de biología evolutiva) Stearns, S. C., & Koella, J. C. (2008). Evolution in Health and Disease (2nd ed.). Oxford University Press, USA.
  • 129. Hawks, J., et al. (2007). Proc Natl Acad Sci USA Fumagalli, M., et al. (2011). PLoS Genetics,
  • 130. Incluso teniendo en cuenta la reciente aceleración en la adaptación humana Hawks, J., et al. (2007). Proc Natl Acad Sci USA Fumagalli, M., et al. (2011). PLoS Genetics,
  • 131. Incluso teniendo en cuenta la reciente aceleración en la adaptación humana Pero en gran parte es debida a epidemias, no sólo a la dieta Hawks, J., et al. (2007). Proc Natl Acad Sci USA Fumagalli, M., et al. (2011). PLoS Genetics,
  • 132. Incluso teniendo en cuenta la reciente aceleración en la adaptación humana Pero en gran parte es debida a epidemias, no sólo a la dieta Hawks, J., et al. (2007). Proc Natl Acad Sci USA Fumagalli, M., et al. (2011). PLoS Genetics,
  • 133. Incluso teniendo en cuenta la reciente aceleración en la adaptación humana Pero en gran parte es debida a epidemias, no sólo a la dieta Hawks, J., et al. (2007). Proc Natl Acad Sci USA Fumagalli, M., et al. (2011). PLoS Genetics,
  • 134. Ya lo explicamos hace tiempo...
  • 135. ¿Cuánto tiempo tardaremos en adaptarnos a los azúcares refinados? ¿Cuanto tiempo tardaremos en adaptarnos al sedentarismo? Si nos adaptamos tan fácilmente a los alimentos nuevos (como algunos postulan) ...o, ¿no suponen una presión selectiva positiva para mermar capacidad reproductiva?
  • 136. Leche materna Los bebés alimentados con leche de fórmula crecen (aparentemente) “bien” (igual que las personas alimentadas a base de cereales) La leche de fórmula puede contener todos los nutrientes necesarios para el desarrollo del bebé La leche materna contiene compuestos bioactivos, probióticos, oligosacáridos, etc, que producen efectos inmuno-endocrinos más allá de los nutrientes ¿Influye de igual manera la leche materna que la de fórmula en la salud del niño y del adulto?
  • 137. Leche materna Si alimentamos a todos los bebés con leche de fórmula los primeros meses de vida, la especie humana seguirá viva (probablemente) dentro de 10,000 años ¿Nos habremos adaptado completamente a la leche de fórmula dentro de 10,000 años y podremos prescindir de la lactancia? Piense de igual manera con los cereales ya que no sólo son un compendio de nutrientes (hay más de 40,000 proteínas y otros compuestos bioactivos que no sabemos exactamente que función tienen)
  • 138. Leche materna La leche materna es un buen ejemplo de que los alimentos no sólo son macro/micronutrientes La leche materna parece que afecta de forma diferente a la microbiota comparada con la leche de fórmula, y ese efecto es independiente de los macro/micronutrientes Kerr CA, et al. Crit Rev Microbiol. 2014
  • 139. “Debemos comer un poco de todo” “La dieta debe ser balanceada, variada…” ¿Si? ¿Cual es la justificación? “Argumentos” típicos
  • 140. “Ya no existen los alimentos que habían en el paleolítico” “Argumentos” típicos “Ni las condiciones ambientales son iguales”
  • 141. “Ya no existen los alimentos que habían en el paleolítico” “Argumentos” típicos “Ni las condiciones ambientales son iguales” Eso es obvio, se trata de minimizar riesgos reduciendo el consumo de alimentos a los que no estemos bien adaptados
  • 142. Toxicidad aguda vs toxicidad a largo plazo Un alimento se ha considerado tradicionalmente comestible, si su toxicidad a corto plazo es baja o inexistente Toxicología Pero, ¿Hay toxicidad acumulativa, a largo plazo?¿carencias nutricionales?
  • 143. Las proteínas de caseína y soja inducen aterosclerosis en animales1,2,3,4 Hay evidencia indirecta de que los cereales, particularmente el trigo, pueden producir aterosclerosis5 1. Eastwood, M., & Kritchevsky, D. (2005). DIETARY FIBER: How Did We Get Where We Are? Annual Review of Nutrition, 25(1), 1–8. 2. Kritchevsky, D. (1979).Vegetable protein and atherosclerosis. Journal of the American Oil Chemists' Society, 56(3), 135–140. 3. Kritchevsky, D.,Tepper, S.A., & Klurfeld, D. M. (1998). Lectin may contribute to the atherogenicity of peanut oil. Lipids, 33(8), 821–823. 4. Kritchevsky, D.,Tepper, S.A.,Williams, D. E., & Story, J.A. (1977). Experimental atherosclerosis in rabbits fed cholesterol-free diets Part 7. Interaction of animal or vegetable protein with fiber.Atherosclerosis, 26(4), 397–403. 5. Lindeberg S. Food and Western Disease. 1st ed.Wiley-Blackwell; 2010. ¡No la de bisonte o ternera!
  • 144. ¿Cómo sabemos que no ocurre lo mismo en humanos a largo plazo? 1. Eastwood, M., & Kritchevsky, D. (2005). DIETARY FIBER: How Did We Get Where We Are? Annual Review of Nutrition, 25(1), 1–8. 2. Kritchevsky, D. (1979).Vegetable protein and atherosclerosis. Journal of the American Oil Chemists' Society, 56(3), 135–140. 3. Kritchevsky, D.,Tepper, S.A., & Klurfeld, D. M. (1998). Lectin may contribute to the atherogenicity of peanut oil. Lipids, 33(8), 821–823. 4. Kritchevsky, D.,Tepper, S.A.,Williams, D. E., & Story, J.A. (1977). Experimental atherosclerosis in rabbits fed cholesterol-free diets Part 7. Interaction of animal or vegetable protein with fiber.Atherosclerosis, 26(4), 397–403. 5. Lindeberg S. Food and Western Disease. 1st ed.Wiley-Blackwell; 2010.
  • 145. ¿Qué problemas puede causar el consumo de cereales y lácteos si mis biomarcadores están bien? Los biomarcadores no son fiables para predecir un infarto de miocardio o ictus La enfermedad isquémica del corazón es una enfermedad “silenciosa” que tarda décadas en manifestarse Lindeberg S. Food and Western Disease. 1st ed.Wiley-Blackwell; 2010.
  • 146. Con permiso de: Lindeberg S. Food and Western Disease. 1st ed.Wiley-Blackwell; 2010. Una dieta saludable parece no ser suficiente para evitar este proceso
  • 147. Otro ejemplo de posibles efectos a largo plazo Weber, M., E., et al. (2014). American Journal of Clinical Nutrition Pero si miramos los detalles...
  • 148. Habría otra forma (perspectiva evolutiva) de verlo: Higher cow’s milk protein content in infant formula increases BMI and obesity risk at school age: follow-up of a randomized trial ¿Cuál es la referencia, los que toman alta cantidad de proteína o los que toman pecho?
  • 149. ¿Le darías de comer estos alimentos a un gato? ¿Por qué no aplicar el “un poco de todo”?
  • 150. Pájaro carnívoro Estructura pancreática muy diferente Pájaro granívoro ¿Estarán adaptados a dietas diferentes? ¿Si les cambiamos la dieta alteraremos su respuesta endocrina?
  • 151. Pilny,A.A. (2008).The Avian Pancreas in Health and Disease. Veterinary Clinics of North America: Exotic Animal Practice, 11(1), 25–34. doi:10.1016/j.cvex.2007.09.007 Interesantemente la pancreatectomía afecta de forma diferente a pájaros granívoros (diabetes transitoria) y carnívoros Los pájaros carnívoros se comportan igual que los mamíferos (desarrollan diabetes tras pancreatectomía) ¿Nuestra anatomía y fisiología pancreática se ha adaptado completamente en 10,000 a los cereales?
  • 152. Chimpanzee Australopithecine Modern human Estas adaptaciones a una dieta nueva tardaron mucho más de 10,000 años Ungar, P. S. American Journal of Physical Anthropology, 2011 Aiello, L. C., & Wheeler, P. Current Anthropology, 1995 En términos evolutivos se hablan en cientos de miles o millones de años
  • 153. Hancock,AM, et al. PNAS. 2010 Adaptación en poblaciones que dependen de los cereales (en rojo) Pancreatic lipase-related protein 2
  • 154. Hancock,AM, et al. PNAS. 2010 Adaptación en poblaciones que dependen de los cereales (en rojo) Pancreatic lipase-related protein 2 Parece que estamos en un proceso de adaptación, y que muchos no están adaptados al mirar ciertos SNPs
  • 155. Estamos en un proceso de adaptación teniendo en cuenta algunos haplotipos No obstante, estos genes confieren susceptibiliad, no son la causa Si se evitan los factores ambientales la diabetes tipo 2 no se manifiesta
  • 156. Evidencia sobre el consumo (esporádico) de legumbres en el paleolítico superior Jones M. Moving North:Archaeobotanical Evidence for Plant Diet in Middle and Upper Paleolithic Europe. Dordrecht: Springer Netherlands; 2009;(Chapter 12):171–80. Savard M, Nesbitt M, Jones MK.The role of wild grasses in subsistence and sedentism: new evidence from the northern Fertile Crescent.World Archaeology. 2006. Lev E, Kislev ME, Bar-Yosef O. Mousterian vegetal food in Kebara cave, Mt. Carmel. Journal of Archaeological Science. 2005.
  • 157. ¿Pero a que rama de nuestra filogenética afecta? Humanos modernos Agricultura
  • 158. ¿Pero a que rama de nuestra filogenética afecta? ¿Y el resto? Humanos modernos Agricultura
  • 159. ¿Esto es normal? Entendiendo la biología, genética y antropología lo normal sería que no estamos adaptados y habría que demostrar que sí estamos adaptados Desafortunadamente, ese paradigma no se tiene en cuenta en la nutrición y J.H. Kellogg tiene más influencia que Charles Darwin
  • 160. Estudios ecológicos en poblaciones que no comen cereales/ lácteos Aparente ausencia de ECV, diabetes u obesidad Lindeberg S. Food and Western Disease: Health and nutrition from an evolutionary perspective. 1st ed. Wiley-Blackwell; 2010.
  • 161. Teoría: los seres humanos modernos deberían estar adaptados a la dieta que tuvieron durante 2.6 millones de años Esto es ciencia Hipótesis nula: una dieta paleolítica no produce efectos diferentes a una dieta con cereales y lácteos H0: μ1 = μ2 Hipótesis alternativa: una dieta paleolítica si produce efectos diferentes a una dieta con cereales y lácteos H1: μ1 ≠ μ2
  • 162. ...pues vamos a refutar la hipótesis nula, si no la puedo refutar tendré que aceptar la hipótesis alternativa
  • 163. Estudio Población Duración Variables con cambios signif. Lindeberg S, 2007 29 sujetos EIC & intolerancia glucosa 3 meses Glucosa-TTOG, peso y cintura Österdahl M, 2008 14 sujetos sanos 3 semanas Peso, IMC, cintura, presión arterial y PAI-1 Jönsson T, 2009 13 sujetos con diabetes tipo 2: diseño cruzado 3 meses HbA1c,TG, PA diastólica, peso, IMC, p. Cintura y HDL Frassetto L, 2010 8 sujetos sanos 17 días PA, insulina TTOG, colesterol total, LDL,TG Ryberg M, 2013 10 mujeres obesas sanas 5 semanas 49% TG hepáticos, peso, IMC, cintura, cadera, diámetro sagital abdominal, glucosa, PA diastólica,TG, colesterol, etc Frassetto L, 2013 13 sujetos con diabetes tipo 2 14 días Excreción ácida neta Mellberg S, 2014 70 mujeres obesas 2 años Masa grasa, peso corporal, circunferencia cintura, diámetro sagital abdominal y TG Frassetto L (no publicado) 22 sujetos sanos 15 días Glucosa en ayunas, fructosamina, PCR Estudios de intervención
  • 164. Estudio Población Duración Variables con cambios signif. Lindeberg S, 2007 29 sujetos EIC & intolerancia glucosa 3 meses Glucosa-TTOG, peso y cintura Österdahl M, 2008 14 sujetos sanos 3 semanas Peso, IMC, cintura, presión arterial y PAI-1 Jönsson T, 2009 13 sujetos con diabetes tipo 2: diseño cruzado 3 meses HbA1c,TG, PA diastólica, peso, IMC, p. Cintura y HDL Frassetto L, 2010 8 sujetos sanos 17 días PA, insulina TTOG, colesterol total, LDL,TG Ryberg M, 2013 10 mujeres obesas sanas 5 semanas 49% TG hepáticos, peso, IMC, cintura, cadera, diámetro sagital abdominal, glucosa, PA diastólica,TG, colesterol, etc Frassetto L, 2013 13 sujetos con diabetes tipo 2 14 días Excreción ácida neta Mellberg S, 2014 70 mujeres obesas 2 años Masa grasa, peso corporal, circunferencia cintura, diámetro sagital abdominal y TG Frassetto L (no publicado) 22 sujetos sanos 15 días Glucosa en ayunas, fructosamina, PCR Estudios de intervención Estudios controlados
  • 165. 300 600 900 1200 Mmol/Lxmin 1104 1145 877 1024 807 1065 Baseline Week 6 Week 12 Baseline Week 6 Week 12 Paleolithic Consensus Área bajo la curva Glucosa 0-120 min Paleolítica vs. mediterránea Lindeberg, S., et al. Diabetologia. 2007 a a b b a a P = 0.001 Empeoramiento!! Mejoría
  • 166. 86.00 88.75 91.50 94.25 97.00 Kg 91.70 96.10 88.00 93.60 86.70 92.20 Baseline Week 6 Week 12 Baseline Week 6 Week 12 Paleolithic Consensus Peso corporal Paleolítica vs. mediterránea Lindeberg, S., et al. Diabetologia. 2007
  • 167. 100 102 104 105 107 cm 105.8 106.6 102.8 105.2 100.2 103.6 Baseline Week 6 Week 12 Baseline Week 6 Week 12 Paleolithic Consensus Circunferencia de cintura Lindeberg, S., et al. Diabetologia. 2007 a a b b c c P = 0.03 Paleolítica vs. mediterránea
  • 168. Food Paleolithic Consensus p value Fruits (g) 493 ± 335 252 ± 179 0.03 Nuts (g) 11 ± 12 2 ± 6 0.02 Cereals without rice (g) 18 ± 52 268 ± 96 0.0001 Milk/dairy (g) 45 ± 119 287 ± 193 0.0006 Oil, margarine 1 ± 3 16 ± 11 0.0001 Diferencias de alimentosLindeberg, S., et al. Diabetologia. 2007 Paleolítica vs. mediterránea
  • 169. Paleolítica vs. mediterránea Lindeberg S, et al. Diabetologia. 2007 CHO 40% PRO 28% FAT 27% 4% Paleolítica CHO 52% PRO 21% FAT 25% 2% Mediterránea Fibra = 21 g Fibra = 27 g Composición macronutrientes Alcohol
  • 170. Volvamos a la dieta mediterránea... Lindeberg S, et al. Diabetologia. 2007 Texto