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Effect of Emulin on Blood Glucose in Type 2 Diabetics
Milton Joseph Ahrens and Daryl L. Thompson
ATM Metabolics LLC, Winter Haven, Florida, USA.
ABSTRACT EmulinÔ is a patented blend of chlorogenic acid, myricetin, and quercetin that has shown efficacy in reducing
midday and post–oral glucose tolerance test (OGTT) area under the curve (AUC) glucose in streptozotocin-treated rats. The
purpose of this study was to determine if similar effects would be evident in type 2 diabetic humans. Forty human subjects with
confirmed type 2 diabetes (10 each in 4 groups: placebo/no medication, Emulin/no medication, placebo/metformin and Emulin/
metformin) were evaluated. At the end of 1 week, fasting blood glucose, 2 h postprandial, actual peak glucose, and AUC (post–
50 g OGTT) were determined. The placebo-only group had a large (5%–13%) increase in all parameters. The Emulin group and
those on metformin performed similarly with reductions between 1% and 5%, with Emulin slightly outperforming the medi-
cation-alone group. The most significant reduction occurred in the Emulin/metformin group, with decreases in the parameters by
up to 20%. These results suggest that Emulin, if consumed regularly, could not only have the acute effect of lowering the
glycemic impact of foods, but chronically lower background blood glucose levels of type 2 diabetics.
KEY WORDS:  chlorogenic acid  flavonoids  flavonols  myricetin  polyphenols  quercetin
INTRODUCTION
Type 2 diabetes is considered an epidemic worldwide
in industrialized nations.1,2
Historically, the incidence
of type 2 diabetes has tracked the increased consumption of
refined carbohydrates.3–6
Type 2 diabetic patients have a
combination of deficits, including insulin resistance and beta
cell failure leading to fasting and postprandial hyperglyce-
mia. The body has a tremendous capacity to maintain ho-
meostasis. Therefore, DeFronzo7
points out that several key
metabolic pathways associated with diabetes, such as glu-
coneogenesis and glucose transport, must be addressed si-
multaneously in order for the body to make headway against
the disease and be able to reset at a lower blood glucose
level. In considering DeFronzo’s proposal, an effective
compound to ameliorate the symptoms of diabetes, or pre-
vent its onset, might:
 Inhibit conversion of complex carbohydrates to simpler
sugars
 Inhibit the absorption of glucose from the gut into the
bloodstream
 Enhance the absorption of glucose from the blood-
stream and its utilization by muscle cell mitochondria
 Inhibit new fat formation
 Inhibit gluconeogenesis
 Increase insulin sensitivity and production
Traditional treatment for diabetes has included alterations
in diet to avoid refined carbohydrates and prescribing of drugs
to inhibit hyperglycemia and increase insulin release. Com-
mon drugs for the treatment of diabetes or its symptoms are
listed in Table 1. All are synthetic, target at most two meta-
bolic pathways, and have moderate or severe side effects.
Natural compounds with excellent safety profiles have been
shown to ameliorate the symptoms of diabetes by affecting
various pathways and have been studied for decades.8
Inhibition of glucosidase
Tarling et al.9
screened 30,000 crude biological extracts
of terrestrial and marine origin for competitive inhibition of
amylase, the most potent of which were found to have a
myricetin core. Additionally, significant alpha glucosidase
activity is inhibited by chlorogenic acid in humans,10,11
by
myricetin and quercetin in swine,11,12
and in rat in vitro by
quercetin.13
This may be the underlying metabolic effect
where chlorogenic acid-enriched coffee with glucose causes
weight loss in humans.14
Similarly, 0.5% Gross Coffee Bean
Extract, of which chlorogenic acid is a major constituent,
has been shown to reduce visceral fat content and body
weight in mice.15
Effects on glucose transport
Robust noncompetitive inhibition of glucose and fructose
transport by glucose transporter 2 (GLUT2) is produced by
the flavonols myricetin and quercetin.16
Intravenous ad-
ministration (1 mg/kg) of myricetin causes a decrease in the
plasma glucose concentration and insulin resistance of
Manuscript received 29 February 2012. Revision accepted 30 September 2012
Address correspondence to: M. Joseph Ahrens, PhD, ATM Metabolics LLC, 6039 Cy-
press Gardens Blvd #238, Winter Haven, FL 33884, USA, E-mail: j.ahrens@atm
metabolics.com
JOURNAL OF MEDICINAL FOOD
J Med Food 16 (3) 2013, 211–215
# Mary Ann Liebert, Inc., and Korean Society of Food Science and Nutrition
DOI: 10.1089/jmf.2012.0069
211
obese Zucker rats by increasing the expression of glucose
transporter 4 (GLUT4) and increasing the protein levels and
phosphorylation of insulin receptor substrate-1 in soleus
muscle of these obese rats.17,18
At the same time, myricetin
has been shown to inhibit the same transporter GLUT4 in
vitro in normal rat adipocytes.19
This different activity in
different tissues, or tissues of the same type in different
organs, may be due to a difference in membrane fluidity.20
Inhibition of adipocyte growth and development
Myricetin coupled with quercetin together work to inhibit
net glucose from entering fat cells19
and release glucose
from fat tissue in rat adipocytes.21–24
Preadipocyte growth or
development into adipocytes is inhibited in vitro by quer-
cetin25
and chlorogenic acid.26
Inhibition of gluconeogenesis
Quercetin inhibits gluconeogenesis in rat liver slices,21,27
which appears to be by inhibition of glucokinase and glu-
cose 6-phosphatase.20
In a study of streptozotocin-treated rats, equal amounts of
myricetin, chlorogenic acid, and quercetin (total 15 mg/kg)
were administered three times per day via gavage; at the end of
1 week, midday background blood glucose and postprandial
area under the curve (AUC) blood glucose dropped by 18%
and 27%, respectively (Koetzner L: Personal communication.
Eurofins Product Safety Laboratories, Dayton, NJ, USA).
A main reason for noncompliance (patients not taking their
medication) associated with diabetic pharmaceuticals is gas-
tro-intestinal issues.28,29
Capsules containing 500 mg of
guava leaf extract normalized for quercetin content admin-
istered every 8 h during 3 days is effective in reducing ab-
dominal pain associated with acute diarrhea in humans.30
Oral treatment with quercitrin, which appears to be converted
to quercetin in the small intestine,31
reduces myeloperoxidase
and alkaline phosphatase levels, preserves normal fluid ab-
sorption, counteracts glutathione depletion, and ameliorates
colonic damage.32
Quercetin-treated rats have less diarrheal
output and do not show mucosal hyperplasia.33
It would appear from these previous studies that a for-
mulation of flavonoids containing myricetin, chlorogenic
acid, and quercetin would work in combination on several
pathways to ameliorate the symptoms of diabetes and ad-
dress much of DeFronzo’s concerns, while at the same time
alleviate gastrointestinal distress. The purpose of this study
is to evaluate whether EmulinÔ (Anderson Global Group
LLC, Irvine, CA, USA), a recently available proprietary
patented formulation of myricetin, quercetin, and chloro-
genic acid, the combination and ratio of which do not
themselves occur in nature, is able to reduce fasting and
postprandial plasma blood glucose in human type 2 dia-
betics, while avoiding gastrointestinal upset.
MATERIALS AND METHODS
This was a randomized, double-blind, placebo controlled,
parallel group study. Test article identity was unknown to
principle investigator, clinic staff, or subjects. This research
was fully reviewed by Quorum Review IRB (Seattle, WA,
USA) and procedures followed were in accordance with the
ethical standards of the responsible committee on human
experimentation and with the Helsinki Declaration of 1975,
as revised in 2008. Forty subjects were selected based upon
the following criteria:
Inclusion criteria:
 Male or female age 18 or older
 Females of childbearing potential must agree to use a
medically approved method of birth control and have a
negative urine pregnancy test result
 Diagnosed with type 2 diabetes (having a blood sugar
level between 126–249 mg/dL)
 body mass index (BMI) ‡ 30 kg/m2
Exclusion criteria:
 Women who are pregnant, breastfeeding, or planning to
become pregnant during the course of the trial
 Unstable medical conditions as determined by the
Principle Investigator
 Use of insulin
 Participation in a clinical research trial within 30 days
before randomization
 Subjects with type I diabetes
Subjects were screened to meet the inclusion and exclusion
criteria. An insulin C-peptide blood test was performed to
show that individuals did not have type 1 diabetes. At
screening (visit 1, week 0), a urine pregnancy test was con-
ducted on all females of childbearing potential. Medical his-
tory and concomitant therapies were reviewed; height, weight,
heart rate, and blood pressure were measured and BMI cal-
culated. Fasting blood samples were collected for determi-
nation of glucose from eligible subjects. Subjects were divided
into two groups: those on metformin, and those on no drug
regime. As subjects of both groups were enrolled they were
Table 1. Current Drug Classes Prescribed
for the Treatment of Type 2 Diabetes
Class Action Side effects
Sulfonylureas Secretagogues—upregulate
the secretion of insulin
Weight gain
Meglitinides Hypoglycemia
Biguanides
(metformin)
Down-regulate gluconeo-
genesis
Diarrhea
Upregulate glucose
transporter 4
Nausea
Thiazolidinediones Upregulate mRNA
transcription leading
to decreased insulin
resistance
Osteoporosis (in
females), fluid
retention,
weight gain
Alpha-glucosidase
inhibitors
Downregulate starch
digestion
Flatulence
GLP analogs Upregulate insulin release Nausea, weight
loss, pancreatitis
GLP, glucagon-like peptide.
212 AHRENS AND THOMPSON
assigned into group A or group B without prejudice. This
resulted in four groups: (1) Placebo only, (2) Emulin only, (3)
Placebo and on metformin, and (4) Emulin and on metformin.
Subjects were administered one 250 mg capsule (placebo
or Emulin, according to group assignment) 15 min before
undergoing oral glucose tolerance test (OGTT) with blood
sampling for glucose at 0, 30, 60, 120, 180, and 240 min
after ingesting a 50 g glucose tolerance beverage (Ensure)
within 5 min. Bottles (containing placebo or Emulin cap-
sules, marked ‘‘A’’ or ‘‘B’’) and a treatment diary were
dispensed and subjects instructed on use. Subject self-
administered one 250 mg capsule 15 min before breakfast,
lunch, and dinner every day except on day of next OGTT,
where the dose at breakfast was skipped. Subjects were in-
structed to record food intake, remain on their typical diet,
and to fast 12 h before returning to the clinic for the next
OGTT.
Subjects returned to the clinic for visit 2 on day 7 (week
1). Weight, heart rate, and blood pressure were measured
and OGTT performed as on visit 1. Diaries were collected;
compliance, concomitant therapies, and adverse events were
assessed and addressed.
Blood glucose for each individual in Group A and Group
B were determined for points at 0, 30, 60, 120, 180, and
240 min for each visit (two visits). The time zero for the
OGTT served as the fasting blood glucose data point. AUCs
were determined for each individual for each visit using
the trapezoid method. Percent changes in fasting, peak
postprandial, 2 h postprandial, and AUC glucose were
determined for each individual within each treatment group.
P-values were determined with a Mann–Whitney U-test for
all combinations of pairs.
RESULTS AND DISCUSSION
Fasting blood glucose levels  125 mg/dL and 2 h post-
prandial glucose post-OGTT  199 mg/dL are indicative of
diabetes. The body’s carbohydrate metabolism fails to ad-
equately control blood sugar. Reducing these two major
indicators could ameliorate the effects of diabetes. Table 2
shows the average percent changes in fasting, 2 h post-
prandial, actual peak, and AUC blood glucose at 1 week for
all treatment groups.
Fasting blood glucose
There was a large increase in the placebo group (12.75%),
while there was a decrease in the Emulin and metformin
groups at a = 0.01 and 0.10, respectively. Emulin out-
performed the metformin group, which remained unchanged,
but the difference between the groups was not statistically
significant. Those persons on metformin receiving Emulin
showed over 30-fold increase in efficacy, significant at
a = 0.10, the effect more than additive, indicating the test
article is impacting other pathways associated with fasting
blood glucose than those affected by metformin alone. It
appears the body has reset its fasting blood glucose at a lower
level in response to Emulin or the combination of Emulin and
metformin. Such a dramatic increase in the placebo group can
Table 2. Statistical Significance Between Groups at the Indicated Alpha Level
Significance atc
Groupa
% Changeb
a = 0.20 a = 0.10 a = 0.05 a = 0.01
Fasting blood glucose
Placebo 12.75 A A A A
Emulin - 5.11 B B D B D B D
Metformin - 0.59 B C B C A B C A B C
E + M - 19.53 D D C D C D
2 h postprandial
Placebo 4.94 A A A A
Emulin - 1.01 A B A B A B A B
Metformin - 3.50 B C A B C A B C A B C
E + M - 13.42 D C D B C D A B C D
Actual peak
Placebo 9.91 A A A A
Emulin 1.15 A B A B A B A B
Metformin - 0.81 B C A B C A B C A B C
E + M - 5.14 B C D B C D A B C D A B C D
Area under the curve
Placebo 11.50 A A A A
Emulin - 5.06 B B B A B
Metformin - 2.95 B C B C B C A B C
E + M - 16.88 B C D B C D B C D B C D
a
Groups are as follows: placebo, taking a placebo and not on any drug regime; Emulin, taking Emulin and not on any drug regime;metformin, on metformin and
taking a placebo; E + M, taking Emulin and on metformin.
b
Percent change is the average percent change in the parameters between day 0 and day 7 for all individuals in the group.
c
Values followed by the same letter are not significantly different at the indicated alpha level.
EFFECT OF EMULIN ON BLOOD SUGAR 213
be explained by the patients taking the liberty to change their
diets to include more glucose-rich foods.
Two hour postprandial and peak glucose
As with the fasting blood glucose, for the 2 h postprandial
blood glucose there was an increase in the placebo group;
however, smaller at 4.9%. There was no significant differ-
ence between the placebo, Emulin, and metformin only
groups at a = 0.10. However, the combination Emulin and
metformin group (E + M) decreased 13% and was signifi-
cantly different contrasted to the placebo group at a = 0.05.
The actual peak glucose showed a very similar pattern ex-
cept the increase in the placebo group and the decrease in the
E + M group was about double and one third that of the 2 h
postprandial changes, respectively.
Area under the curve
Fasting blood glucose and AUC showed a remarkably
similar pattern and levels of significance. Although fasting
blood glucose and peak glucose levels are indicators for
diabetes, AUC is most often used to determine the effec-
tiveness of treatments for the disease. With no treatment, the
placebo group had an increase in this parameter of 11.5% by
the end of the week, while the Emulin alone group experi-
enced a 5% decrease. Metformin alone was slightly less
effective at reducing AUC (3%) than Emulin alone. When
taken with Emulin, the reduction was  16%. While the
effects appear to be more than additive, there was no sig-
nificant difference between the Emulin and metformin
groups. The data presented in Table 2 is visually represented
in Figures 1 and 2. The acute effect of Emulin (the effect
which occurs immediately or within hours of administra-
tion) is shown in Figure 1. Peak glucose and AUC were
reduced compared to control (placebo) in the Emulin groups
with or without metformin, which results in a lower gly-
cemic impact, with the E + M group having the lowest peak
and AUC. Figure 2 shows a chronic effect (the effect which
occurs over days following or during administration) evi-
dent at 1 week. What is immediately apparent is the sepa-
ration between groups with respect to all parameters at 1
week contrasted with week 0. The Emulin, metformin, and
E + M groups all had lower fasting, peak, and AUC blood
glucose levels as compared with the placebo group. The
metformin groups’ peak glucose was delayed 1 h compared
to the placebo and Emulin-only groups. However, the AUC
for both Emulin and E + M groups had significantly lower
AUC than either the placebo or metformin-only groups.
In this study, there were no significant distribution patterns
of weight, BMI, race, sex, or age between groups and no
observed significant differences between diets and food
consumption patterns between groups. Although quercetin
and myricetin have been shown to competitively inhibit the
uptake of methylglucose in isolated rat adipocytes18
and
preadipocyte growth or development into adipocytes is in-
hibited in vitro by chlorogenic acid22
and quercetin,23
in this
trial, there was no significant differences in weight loss
between groups, probably due to the brevity of the study
period. One subject each in the metformin and E + M groups
reported gastrointestinal issues. These data suggest that
Emulin can impact blood glucose levels in type 2 diabetics
by lowering fasting blood glucose levels, and AUC follow-
ing OGTT by 1 week. Individuals already receiving met-
formin as a treatment may see improvements over metformin
alone by the addition of Emulin. These results support the
hypothesis that Emulin, if consumed regularly, could not
only have the acute effect of lowering the glycemic impact of
foods, but chronically lower background blood glucose
levels of type 2 diabetics. Further research is warranted.
ACKNOWLEDGMENTS
The authors wish to express appreciation to Mark Kipnes,
Associate Director, Diabetes  Glandular Disease Clinic,
San Antonio, TX, USA, for valuable insight and assistance
in coordinating and planning this investigation.
AUTHOR DISCLOSURE STATEMENT
J.A. and D.T. are employees of ATM Metabolics LLC,
Winter Haven, FL, USA. This study was conducted under
200
220
240
260
100
120
140
160
180
0 30 60 90 120 150 180 210 240
mg/dLglucose
Time in Minutes
Placebo Emulin Drug E + D
FIG. 1. Effect of Emulin, metformin, and Emulin plus metformin on
oral glucose tolerance test (OGTT) following administration of 250 mg
Emulin at day 0. Data points are group means with standard errors,
n = 10. Color images available online at www.liebertpub.com/jmf
200
220
240
260
100
120
140
160
180
0 30 60 90 120 150 180 210 240
mg/dLglucose
Time in Minutes
Placebo Emulin Drug E + D
FIG. 2. Effect of Emulin, metformin, and Emulin plus metformin
on OGTT after 1 week administration of 250 mg Emulin 3 · daily.
Data points are group means with standard errors, n = 10. Color
images available online at www.liebertpub.com/jmf
214 AHRENS AND THOMPSON
contract by the Diabetes  Glandular Disease Clinic and
financed by ATM Metabolics LLC.
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EFFECT OF EMULIN ON BLOOD SUGAR 215
This article has been cited by:
1. Yongjie Ma, Mingming Gao, Dexi Liu. 2015. Chlorogenic Acid Improves High Fat Diet-Induced Hepatic Steatosis and Insulin
Resistance in Mice. Pharmaceutical Research 32, 1200-1209. [CrossRef]
2. Mohamed Eddouks, Amina Bidi, Bachir E.L. Bouhali, Naoufel Ali ZeggwaghInsulin Resistance as a Target of Some Plant-
Derived Phytocompounds 351-373. [CrossRef]
3. Kim Ji Yeon, Kwon Hye Young, Kim Kyoung Soo, Kim Mi Kyung, Kwon Oran. 2013. Postprandial Glucose and NF-κB Responses
Are Regulated Differently by Monounsaturated Fatty Acid and Dietary Fiber in Impaired Fasting Glucose Subjects. Journal of
Medicinal Food 16:12, 1168-1171. [Abstract] [Full Text HTML] [Full Text PDF] [Full Text PDF with Links]
4. Shengxi Meng, Jianmei Cao, Qin Feng, Jinghua Peng, Yiyang Hu. 2013. Roles of Chlorogenic Acid on Regulating Glucose and
Lipids Metabolism: A Review. Evidence-Based Complementary and Alternative Medicine 2013, 1-11. [CrossRef]

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Effect of Emulin on Blood Glucose in Type 2 Diabetics

  • 1. Effect of Emulin on Blood Glucose in Type 2 Diabetics Milton Joseph Ahrens and Daryl L. Thompson ATM Metabolics LLC, Winter Haven, Florida, USA. ABSTRACT EmulinÔ is a patented blend of chlorogenic acid, myricetin, and quercetin that has shown efficacy in reducing midday and post–oral glucose tolerance test (OGTT) area under the curve (AUC) glucose in streptozotocin-treated rats. The purpose of this study was to determine if similar effects would be evident in type 2 diabetic humans. Forty human subjects with confirmed type 2 diabetes (10 each in 4 groups: placebo/no medication, Emulin/no medication, placebo/metformin and Emulin/ metformin) were evaluated. At the end of 1 week, fasting blood glucose, 2 h postprandial, actual peak glucose, and AUC (post– 50 g OGTT) were determined. The placebo-only group had a large (5%–13%) increase in all parameters. The Emulin group and those on metformin performed similarly with reductions between 1% and 5%, with Emulin slightly outperforming the medi- cation-alone group. The most significant reduction occurred in the Emulin/metformin group, with decreases in the parameters by up to 20%. These results suggest that Emulin, if consumed regularly, could not only have the acute effect of lowering the glycemic impact of foods, but chronically lower background blood glucose levels of type 2 diabetics. KEY WORDS: chlorogenic acid flavonoids flavonols myricetin polyphenols quercetin INTRODUCTION Type 2 diabetes is considered an epidemic worldwide in industrialized nations.1,2 Historically, the incidence of type 2 diabetes has tracked the increased consumption of refined carbohydrates.3–6 Type 2 diabetic patients have a combination of deficits, including insulin resistance and beta cell failure leading to fasting and postprandial hyperglyce- mia. The body has a tremendous capacity to maintain ho- meostasis. Therefore, DeFronzo7 points out that several key metabolic pathways associated with diabetes, such as glu- coneogenesis and glucose transport, must be addressed si- multaneously in order for the body to make headway against the disease and be able to reset at a lower blood glucose level. In considering DeFronzo’s proposal, an effective compound to ameliorate the symptoms of diabetes, or pre- vent its onset, might: Inhibit conversion of complex carbohydrates to simpler sugars Inhibit the absorption of glucose from the gut into the bloodstream Enhance the absorption of glucose from the blood- stream and its utilization by muscle cell mitochondria Inhibit new fat formation Inhibit gluconeogenesis Increase insulin sensitivity and production Traditional treatment for diabetes has included alterations in diet to avoid refined carbohydrates and prescribing of drugs to inhibit hyperglycemia and increase insulin release. Com- mon drugs for the treatment of diabetes or its symptoms are listed in Table 1. All are synthetic, target at most two meta- bolic pathways, and have moderate or severe side effects. Natural compounds with excellent safety profiles have been shown to ameliorate the symptoms of diabetes by affecting various pathways and have been studied for decades.8 Inhibition of glucosidase Tarling et al.9 screened 30,000 crude biological extracts of terrestrial and marine origin for competitive inhibition of amylase, the most potent of which were found to have a myricetin core. Additionally, significant alpha glucosidase activity is inhibited by chlorogenic acid in humans,10,11 by myricetin and quercetin in swine,11,12 and in rat in vitro by quercetin.13 This may be the underlying metabolic effect where chlorogenic acid-enriched coffee with glucose causes weight loss in humans.14 Similarly, 0.5% Gross Coffee Bean Extract, of which chlorogenic acid is a major constituent, has been shown to reduce visceral fat content and body weight in mice.15 Effects on glucose transport Robust noncompetitive inhibition of glucose and fructose transport by glucose transporter 2 (GLUT2) is produced by the flavonols myricetin and quercetin.16 Intravenous ad- ministration (1 mg/kg) of myricetin causes a decrease in the plasma glucose concentration and insulin resistance of Manuscript received 29 February 2012. Revision accepted 30 September 2012 Address correspondence to: M. Joseph Ahrens, PhD, ATM Metabolics LLC, 6039 Cy- press Gardens Blvd #238, Winter Haven, FL 33884, USA, E-mail: j.ahrens@atm metabolics.com JOURNAL OF MEDICINAL FOOD J Med Food 16 (3) 2013, 211–215 # Mary Ann Liebert, Inc., and Korean Society of Food Science and Nutrition DOI: 10.1089/jmf.2012.0069 211
  • 2. obese Zucker rats by increasing the expression of glucose transporter 4 (GLUT4) and increasing the protein levels and phosphorylation of insulin receptor substrate-1 in soleus muscle of these obese rats.17,18 At the same time, myricetin has been shown to inhibit the same transporter GLUT4 in vitro in normal rat adipocytes.19 This different activity in different tissues, or tissues of the same type in different organs, may be due to a difference in membrane fluidity.20 Inhibition of adipocyte growth and development Myricetin coupled with quercetin together work to inhibit net glucose from entering fat cells19 and release glucose from fat tissue in rat adipocytes.21–24 Preadipocyte growth or development into adipocytes is inhibited in vitro by quer- cetin25 and chlorogenic acid.26 Inhibition of gluconeogenesis Quercetin inhibits gluconeogenesis in rat liver slices,21,27 which appears to be by inhibition of glucokinase and glu- cose 6-phosphatase.20 In a study of streptozotocin-treated rats, equal amounts of myricetin, chlorogenic acid, and quercetin (total 15 mg/kg) were administered three times per day via gavage; at the end of 1 week, midday background blood glucose and postprandial area under the curve (AUC) blood glucose dropped by 18% and 27%, respectively (Koetzner L: Personal communication. Eurofins Product Safety Laboratories, Dayton, NJ, USA). A main reason for noncompliance (patients not taking their medication) associated with diabetic pharmaceuticals is gas- tro-intestinal issues.28,29 Capsules containing 500 mg of guava leaf extract normalized for quercetin content admin- istered every 8 h during 3 days is effective in reducing ab- dominal pain associated with acute diarrhea in humans.30 Oral treatment with quercitrin, which appears to be converted to quercetin in the small intestine,31 reduces myeloperoxidase and alkaline phosphatase levels, preserves normal fluid ab- sorption, counteracts glutathione depletion, and ameliorates colonic damage.32 Quercetin-treated rats have less diarrheal output and do not show mucosal hyperplasia.33 It would appear from these previous studies that a for- mulation of flavonoids containing myricetin, chlorogenic acid, and quercetin would work in combination on several pathways to ameliorate the symptoms of diabetes and ad- dress much of DeFronzo’s concerns, while at the same time alleviate gastrointestinal distress. The purpose of this study is to evaluate whether EmulinÔ (Anderson Global Group LLC, Irvine, CA, USA), a recently available proprietary patented formulation of myricetin, quercetin, and chloro- genic acid, the combination and ratio of which do not themselves occur in nature, is able to reduce fasting and postprandial plasma blood glucose in human type 2 dia- betics, while avoiding gastrointestinal upset. MATERIALS AND METHODS This was a randomized, double-blind, placebo controlled, parallel group study. Test article identity was unknown to principle investigator, clinic staff, or subjects. This research was fully reviewed by Quorum Review IRB (Seattle, WA, USA) and procedures followed were in accordance with the ethical standards of the responsible committee on human experimentation and with the Helsinki Declaration of 1975, as revised in 2008. Forty subjects were selected based upon the following criteria: Inclusion criteria: Male or female age 18 or older Females of childbearing potential must agree to use a medically approved method of birth control and have a negative urine pregnancy test result Diagnosed with type 2 diabetes (having a blood sugar level between 126–249 mg/dL) body mass index (BMI) ‡ 30 kg/m2 Exclusion criteria: Women who are pregnant, breastfeeding, or planning to become pregnant during the course of the trial Unstable medical conditions as determined by the Principle Investigator Use of insulin Participation in a clinical research trial within 30 days before randomization Subjects with type I diabetes Subjects were screened to meet the inclusion and exclusion criteria. An insulin C-peptide blood test was performed to show that individuals did not have type 1 diabetes. At screening (visit 1, week 0), a urine pregnancy test was con- ducted on all females of childbearing potential. Medical his- tory and concomitant therapies were reviewed; height, weight, heart rate, and blood pressure were measured and BMI cal- culated. Fasting blood samples were collected for determi- nation of glucose from eligible subjects. Subjects were divided into two groups: those on metformin, and those on no drug regime. As subjects of both groups were enrolled they were Table 1. Current Drug Classes Prescribed for the Treatment of Type 2 Diabetes Class Action Side effects Sulfonylureas Secretagogues—upregulate the secretion of insulin Weight gain Meglitinides Hypoglycemia Biguanides (metformin) Down-regulate gluconeo- genesis Diarrhea Upregulate glucose transporter 4 Nausea Thiazolidinediones Upregulate mRNA transcription leading to decreased insulin resistance Osteoporosis (in females), fluid retention, weight gain Alpha-glucosidase inhibitors Downregulate starch digestion Flatulence GLP analogs Upregulate insulin release Nausea, weight loss, pancreatitis GLP, glucagon-like peptide. 212 AHRENS AND THOMPSON
  • 3. assigned into group A or group B without prejudice. This resulted in four groups: (1) Placebo only, (2) Emulin only, (3) Placebo and on metformin, and (4) Emulin and on metformin. Subjects were administered one 250 mg capsule (placebo or Emulin, according to group assignment) 15 min before undergoing oral glucose tolerance test (OGTT) with blood sampling for glucose at 0, 30, 60, 120, 180, and 240 min after ingesting a 50 g glucose tolerance beverage (Ensure) within 5 min. Bottles (containing placebo or Emulin cap- sules, marked ‘‘A’’ or ‘‘B’’) and a treatment diary were dispensed and subjects instructed on use. Subject self- administered one 250 mg capsule 15 min before breakfast, lunch, and dinner every day except on day of next OGTT, where the dose at breakfast was skipped. Subjects were in- structed to record food intake, remain on their typical diet, and to fast 12 h before returning to the clinic for the next OGTT. Subjects returned to the clinic for visit 2 on day 7 (week 1). Weight, heart rate, and blood pressure were measured and OGTT performed as on visit 1. Diaries were collected; compliance, concomitant therapies, and adverse events were assessed and addressed. Blood glucose for each individual in Group A and Group B were determined for points at 0, 30, 60, 120, 180, and 240 min for each visit (two visits). The time zero for the OGTT served as the fasting blood glucose data point. AUCs were determined for each individual for each visit using the trapezoid method. Percent changes in fasting, peak postprandial, 2 h postprandial, and AUC glucose were determined for each individual within each treatment group. P-values were determined with a Mann–Whitney U-test for all combinations of pairs. RESULTS AND DISCUSSION Fasting blood glucose levels 125 mg/dL and 2 h post- prandial glucose post-OGTT 199 mg/dL are indicative of diabetes. The body’s carbohydrate metabolism fails to ad- equately control blood sugar. Reducing these two major indicators could ameliorate the effects of diabetes. Table 2 shows the average percent changes in fasting, 2 h post- prandial, actual peak, and AUC blood glucose at 1 week for all treatment groups. Fasting blood glucose There was a large increase in the placebo group (12.75%), while there was a decrease in the Emulin and metformin groups at a = 0.01 and 0.10, respectively. Emulin out- performed the metformin group, which remained unchanged, but the difference between the groups was not statistically significant. Those persons on metformin receiving Emulin showed over 30-fold increase in efficacy, significant at a = 0.10, the effect more than additive, indicating the test article is impacting other pathways associated with fasting blood glucose than those affected by metformin alone. It appears the body has reset its fasting blood glucose at a lower level in response to Emulin or the combination of Emulin and metformin. Such a dramatic increase in the placebo group can Table 2. Statistical Significance Between Groups at the Indicated Alpha Level Significance atc Groupa % Changeb a = 0.20 a = 0.10 a = 0.05 a = 0.01 Fasting blood glucose Placebo 12.75 A A A A Emulin - 5.11 B B D B D B D Metformin - 0.59 B C B C A B C A B C E + M - 19.53 D D C D C D 2 h postprandial Placebo 4.94 A A A A Emulin - 1.01 A B A B A B A B Metformin - 3.50 B C A B C A B C A B C E + M - 13.42 D C D B C D A B C D Actual peak Placebo 9.91 A A A A Emulin 1.15 A B A B A B A B Metformin - 0.81 B C A B C A B C A B C E + M - 5.14 B C D B C D A B C D A B C D Area under the curve Placebo 11.50 A A A A Emulin - 5.06 B B B A B Metformin - 2.95 B C B C B C A B C E + M - 16.88 B C D B C D B C D B C D a Groups are as follows: placebo, taking a placebo and not on any drug regime; Emulin, taking Emulin and not on any drug regime;metformin, on metformin and taking a placebo; E + M, taking Emulin and on metformin. b Percent change is the average percent change in the parameters between day 0 and day 7 for all individuals in the group. c Values followed by the same letter are not significantly different at the indicated alpha level. EFFECT OF EMULIN ON BLOOD SUGAR 213
  • 4. be explained by the patients taking the liberty to change their diets to include more glucose-rich foods. Two hour postprandial and peak glucose As with the fasting blood glucose, for the 2 h postprandial blood glucose there was an increase in the placebo group; however, smaller at 4.9%. There was no significant differ- ence between the placebo, Emulin, and metformin only groups at a = 0.10. However, the combination Emulin and metformin group (E + M) decreased 13% and was signifi- cantly different contrasted to the placebo group at a = 0.05. The actual peak glucose showed a very similar pattern ex- cept the increase in the placebo group and the decrease in the E + M group was about double and one third that of the 2 h postprandial changes, respectively. Area under the curve Fasting blood glucose and AUC showed a remarkably similar pattern and levels of significance. Although fasting blood glucose and peak glucose levels are indicators for diabetes, AUC is most often used to determine the effec- tiveness of treatments for the disease. With no treatment, the placebo group had an increase in this parameter of 11.5% by the end of the week, while the Emulin alone group experi- enced a 5% decrease. Metformin alone was slightly less effective at reducing AUC (3%) than Emulin alone. When taken with Emulin, the reduction was 16%. While the effects appear to be more than additive, there was no sig- nificant difference between the Emulin and metformin groups. The data presented in Table 2 is visually represented in Figures 1 and 2. The acute effect of Emulin (the effect which occurs immediately or within hours of administra- tion) is shown in Figure 1. Peak glucose and AUC were reduced compared to control (placebo) in the Emulin groups with or without metformin, which results in a lower gly- cemic impact, with the E + M group having the lowest peak and AUC. Figure 2 shows a chronic effect (the effect which occurs over days following or during administration) evi- dent at 1 week. What is immediately apparent is the sepa- ration between groups with respect to all parameters at 1 week contrasted with week 0. The Emulin, metformin, and E + M groups all had lower fasting, peak, and AUC blood glucose levels as compared with the placebo group. The metformin groups’ peak glucose was delayed 1 h compared to the placebo and Emulin-only groups. However, the AUC for both Emulin and E + M groups had significantly lower AUC than either the placebo or metformin-only groups. In this study, there were no significant distribution patterns of weight, BMI, race, sex, or age between groups and no observed significant differences between diets and food consumption patterns between groups. Although quercetin and myricetin have been shown to competitively inhibit the uptake of methylglucose in isolated rat adipocytes18 and preadipocyte growth or development into adipocytes is in- hibited in vitro by chlorogenic acid22 and quercetin,23 in this trial, there was no significant differences in weight loss between groups, probably due to the brevity of the study period. One subject each in the metformin and E + M groups reported gastrointestinal issues. These data suggest that Emulin can impact blood glucose levels in type 2 diabetics by lowering fasting blood glucose levels, and AUC follow- ing OGTT by 1 week. Individuals already receiving met- formin as a treatment may see improvements over metformin alone by the addition of Emulin. These results support the hypothesis that Emulin, if consumed regularly, could not only have the acute effect of lowering the glycemic impact of foods, but chronically lower background blood glucose levels of type 2 diabetics. Further research is warranted. ACKNOWLEDGMENTS The authors wish to express appreciation to Mark Kipnes, Associate Director, Diabetes Glandular Disease Clinic, San Antonio, TX, USA, for valuable insight and assistance in coordinating and planning this investigation. AUTHOR DISCLOSURE STATEMENT J.A. and D.T. are employees of ATM Metabolics LLC, Winter Haven, FL, USA. This study was conducted under 200 220 240 260 100 120 140 160 180 0 30 60 90 120 150 180 210 240 mg/dLglucose Time in Minutes Placebo Emulin Drug E + D FIG. 1. Effect of Emulin, metformin, and Emulin plus metformin on oral glucose tolerance test (OGTT) following administration of 250 mg Emulin at day 0. Data points are group means with standard errors, n = 10. Color images available online at www.liebertpub.com/jmf 200 220 240 260 100 120 140 160 180 0 30 60 90 120 150 180 210 240 mg/dLglucose Time in Minutes Placebo Emulin Drug E + D FIG. 2. Effect of Emulin, metformin, and Emulin plus metformin on OGTT after 1 week administration of 250 mg Emulin 3 · daily. Data points are group means with standard errors, n = 10. Color images available online at www.liebertpub.com/jmf 214 AHRENS AND THOMPSON
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