Category I: protein (consisting of 9 amino acids essential for human body).

1. leucine

2. Isoleucine

3. Lysine

4. phenylalanine

5. Threonine

6. tryptophan

7. Valine

8. Methionine

9. Histidine (essential for children)

Category II: Lipids: Essential fatty acids: 2 kinds.

10. linoleic acid

1 1.α- linolenic acid

The third category: carbohydrates

12. Carbohydrates (including dietary fiber), mainly sugars, such as glucose and sucrose.

The fourth category: minerals

(1) constant element:

13. Potassium

14. Sodium

15. Calcium

16. magnesium

17. Sulfur

18. Phosphorus

19. Chlorine

(2) Trace elements:

20. Iodine

2 1. selenium

copper

23. molybdenum

24.chromium

cobalt

iron

27. Zinc

Category V: Vitamins:

28. vitamin a

29. Vitamin B 1

30. Vitamin B2

3 1. vitamin B6

32. Vitamin B 12

33. nicotinic acid

34. Pantothenic acid

35. folic acid

36. biotin

37. choline

38. vitamin c

39. Calcified alcohol

40. tocopherol

4 1. vitamin k

Category VI: Water

42. Water

In addition, add. Dietary fiber can also be classified into a large category, including cellulose, hemicellulose, pectin and lignin.