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Name:        Dongliang Wang
Department: Nutrition
Email :
wdliang@mail.sysu.edu.cn
Tel :                      13433965139
Outlines

 What is obesity ?

 Harmness of
obesity ?
 How to diagnose obesity ?

 What causes obesity ?

 How to treat obesity by nutrition ?
What is obesity ?

       An abnormal accumulation of
       body fat, usually 20 percent or
       more over an individual’s ideal
       body weight.
Harmness of obesity ?
         Stroke

                                   Heart
                                   disease
      Breath
      hard

Fatty liver                            Diabetes
Gall-stone


  Hampered
  sexuality
                                    Arthritis



      Misfortunes (obesity) never come singly
How to diagnose obesity ?




Use a expensive machine to quantify the weight of body fat
How to diagnose obesity by a
cheap and convenient way?
BMI, an widely used index for obesity
  Body mass index (BMI) is defined as
                                          Western countries: BMI≥30
  the individual's body mass divided by
  the square of his or her height.        China: BMI≥28




Requirement:
2. Early morning
3. Fasting state (have not breakfast)
4. Emptying feces and urine
5. Wearing a vest shirt and shorts



                                             Strong but not obesity
What causes obesity ?




                          Energy
                                          Energy intake
                          expenditure


Type I: Primary obesity      Type II:Secondary obesity
  (genetic factors)         (disruption in energy balance)



                               90% obesity belongs to
                               the secondary type
How to treat obesity ?
Obesity therapy by reducing energy intake
Which nutrients could provide energy ?

 Nutrients                      Energy

1. carbohydrate                1 g= 4 kcal
2. protein                     1 g= 4 kcal
3. fat                         1 g= 9 kcal
4. mineral
5. vitamin
6. fibre
7. water
Key points to prevent/treat obesity by modulation of diets

                      Healthy individual   Obesity individual

Total energy intake      2420 Kcal            1935 Kcal         20%

Protein                  242 Kcal               484 Kcal        200%

Fat                       605 Kcal              194 Kcal        310%

Carbohydrate             1573 Kcal             1275 Kcal        19%
Obesity and nutrition

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Obesity and nutrition

  • 1. Name: Dongliang Wang Department: Nutrition Email : wdliang@mail.sysu.edu.cn Tel : 13433965139
  • 2. Outlines  What is obesity ?  Harmness of obesity ?  How to diagnose obesity ?  What causes obesity ?  How to treat obesity by nutrition ?
  • 3. What is obesity ? An abnormal accumulation of body fat, usually 20 percent or more over an individual’s ideal body weight.
  • 4. Harmness of obesity ? Stroke Heart disease Breath hard Fatty liver Diabetes Gall-stone Hampered sexuality Arthritis Misfortunes (obesity) never come singly
  • 5. How to diagnose obesity ? Use a expensive machine to quantify the weight of body fat
  • 6. How to diagnose obesity by a cheap and convenient way?
  • 7. BMI, an widely used index for obesity Body mass index (BMI) is defined as Western countries: BMI≥30 the individual's body mass divided by the square of his or her height. China: BMI≥28 Requirement: 2. Early morning 3. Fasting state (have not breakfast) 4. Emptying feces and urine 5. Wearing a vest shirt and shorts Strong but not obesity
  • 8. What causes obesity ? Energy Energy intake expenditure Type I: Primary obesity Type II:Secondary obesity (genetic factors) (disruption in energy balance) 90% obesity belongs to the secondary type
  • 9. How to treat obesity ?
  • 10. Obesity therapy by reducing energy intake
  • 11. Which nutrients could provide energy ? Nutrients Energy 1. carbohydrate 1 g= 4 kcal 2. protein 1 g= 4 kcal 3. fat 1 g= 9 kcal 4. mineral 5. vitamin 6. fibre 7. water
  • 12. Key points to prevent/treat obesity by modulation of diets Healthy individual Obesity individual Total energy intake 2420 Kcal 1935 Kcal 20% Protein 242 Kcal 484 Kcal 200% Fat 605 Kcal 194 Kcal 310% Carbohydrate 1573 Kcal 1275 Kcal 19%