obesity and nutrition

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？

Heart disease

Stroke

Breath hard

Fatty liver

Gall-stone

Hampered sexuality

Diabetes

Arthritis

Misfortunes (obesity) never come singly

Use a expensive machine to quantify the weight of body fat

How to diagnose obesity？

How to diagnose obesity by a

cheap and convenient way?

Body mass index (BMI) is defined as the individual's body mass divided by the square of his or her height.

BMI, an widely used index for obesity

Requirement:

1. Early morning

2. Fasting state (have not breakfast)

3. Emptying feces and urine

4. Wearing a vest shirt and shorts

Western countries: BMI≥30

China: BMI≥28

Strong but not obesity

What causes obesity？

Type I: Primary obesity (genetic factors)

Energy

expenditure Energy intake

Type II:Secondary obesity(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 ?

1. carbohydrate

2. protein

3. fat

4. mineral

5. vitamin

6. fibre

7. water

EnergyNutrients

1 g= 4 kcal

1 g= 4 kcal

1 g= 9 kcal

Key points to prevent/treat obesity by modulation of diets

Healthy individual Obesity individual

Total energy intake

Protein

Fat

Carbohydrate

2420 Kcal 1935 Kcal 20%

242 Kcal 484 Kcal

605 Kcal

1573 Kcal

194 Kcal

1275 Kcal

200%

310%

19%