Shanxi satellite TV family healthy classroom

1, vitamin a

Many people compare vitamin A to a vitamin for maintaining brightness, because it plays an extremely important role in human vision. When vitamin A is deficient, it will easily affect the conjunctiva and cornea of the eyes, resulting in dryness, softening and even perforation of the conjunctiva or cornea, and decreased lacrimal gland secretion. At the same time, it may also reduce the dark vision ability of the eyes, which may lead to night blindness in severe cases.

Vitamin A also has special physiological functions, such as the lack of vitamin A, the skin will be drier, the nails will be rougher and forked; In addition, if you lack vitamin A in childhood, your resistance will drop and you will easily catch a cold, fever and pneumonia.

Foods rich in vitamin A include fish, eggs, meat, poultry, milk and its products, dark green vegetables, carrots, tomatoes and sweet potatoes.

2, vitamin b2

Vitamin b2 can promote the metabolism of sugar, protein and fat in the body, and also help maintain the normal visual function of the body. However, it should be noted that the Chinese Medical Association has formulated the recommended amount of dietary vitamin b2 for residents, which is 1.4mg per day for adult males and 1.2m per day for adult females. Foods rich in vitamin b2 include milk, eggs, animal offal, cereals, vegetables and fruits. Therefore, as long as these foods are stored and processed normally, the damage and loss of vitamin b2 can be reduced, and normal people do not need to supplement vitamin b2.

Some diseases may affect the absorption and utilization of vitamin b2, so it is necessary to supplement vitamin b2 appropriately according to the doctor's advice.

3, vitamin b6

Vitamin b6 is water-soluble and easily destroyed by light or alkali. Vitamin b6 can promote the absorption of amino acids, the synthesis of protein, and the metabolism of nerves and fats. It is also an essential substance for female estrogen metabolism, which is helpful to prevent and treat some gynecological diseases. Foods rich in vitamin b6 include lean meat, bananas, soybeans, walnuts and laver.

4. Vitamin b 12

Vitamin b 12 does not exist in plants, but widely exists in fish, eggs and meat, and intestinal bacteria can also be synthesized. So generally speaking, normal people, except vegetarians, will not lack vitamin b 12. Vitamin b 12 can nourish nerves and prevent folic acid deficiency anemia, and it is also one of the essential elements for erythropoiesis.

Excessive supplementation of vitamin b 12 is prohibited, because it is reported that excessive supplementation or injection of vitamin b 12 may produce toxic and side effects, such as asthma, urticaria, eczema, facial edema and other reactions, and may even cause nervous excitement and palpitations.

If you want to have a more in-depth study of vitamins, you can look at the book How to Supplement Vitamins Reasonably.

1. vitamins-the key to life.

2. How many kinds of vitamins are there?

3. How many vitamins does the human body need?

4. How to get vitamins

Drinking tea can supplement many vitamins.

6. Two ways to take vitamins

7. Wrong practices that lead to the loss of vitamins in fruits and vegetables.

8. Reasonable preservation and processing of food can reduce the loss of vitamins.

9. Take medicine and vitamins after meals.

Who is the best partner of vitamins?

1 1. Pay attention to vitamin supplementation to avoid misunderstanding.