kinds of food nutrient and its function

1.  carbohydrate    

•  A key source of energy for human body
• 1 gram carbohydrate= 4,1 calorie
• having important role in metabolism process
• maintaining the balance level, of acid and bases, forming cells, tissue, and organs
• the exceeding carbohydrate will be stored in the form of glycogen (in the liver and muscle) and fat (in fat tissue)
• sources: rice, corn, cassava, potato, sago, wheat                                            

2.  protein

• divided into 2 kinds, animal protein (fish, milk, and meat) and vegetable protein (soybean, string beans, and other legumes)
• the function of protein:
  -forming special growing substances (hormone, enzyme, antibody, and chromosome); body defence; cell tissue, and organ maintenance and reparations
• lack of protein in everyday food will result kwashiorkor
  

3.  fat

• divided into 2 kinds, animal fat (meat, milk, and egg) and vegetable fat (peanut, coconut)
• function:
  - to create energy
  - to dissolve vitamin A,D,E, and K
  - to avoid body organs from collision and cold temperature

4.  Vitamin

• function:
  - to keep the optimal growth and health
  - to protect and control body instruments
• based on its solubility, there are 2 kinds of vitamin
  - water-soluble: vitamin B and C
  - fat-soluble    : vitamin A,D,E, and K
• one who is lack of particular vitamin may suffer avitaminosis