Vitamin A: It can maintain normal vision and the integrity of epithelial cells of skin mucosa, and has anti-oxidation and anti-tumor effects. People who lack vitamin A can't see clearly in dim light or moonlight. The serious problem is night blindness. People who usually use too much eyes should supplement vitamin A; In addition, people who often have peeling palms and dry eyes also lack vitamin A, supplement vitamin A, and try to eat animal liver, egg yolk, mango, red sweet potato, persimmon, loquat, apricot, carrot and so on.

Vitamin B family: including vitamins B 1, B2, B6 and B 12, which mainly maintain metabolism in the body, including energy conversion of fat, protein and carbohydrates. If you lack B vitamins, there will be symptoms such as beriberi, fingertip numbness, angular stomatitis, glossitis, erythema and herpes. Beans, wheat bran, liver, egg yolk, fish, meat and green leafy plants are rich in vitamin B.

Vitamin C: People who lack vitamin C are prone to bleeding, especially gums and nosebleeds. Fresh vegetables and fruits contain more, but if vegetables are cooked for too long, vitamin C will be destroyed.