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How many vitamins does a person need to take in a day?
Vitamins the human body needs every day:

Vitamin a? 0.8- 1. 1 mg; ? Pre-vitamin a or pre-vitamin a? 2 mg; Vitamin B 1 1.4 mg; ? Vitamin B2? 1.6 mg; ? Vitamin B6? 2 mg;

Vitamin B 12? 1 μ g; Vitamin C 60 mg; ? Vitamin e? 10 mg; Nicotinic acid18mg; Folic acid 200 micrograms; Pantothenic acid 6 mg.

Vitamin C supports the body's defense system and forms tissues. It will be excreted with sweat during exercise and must be replenished in time. Vitamin E protects the human body from external harsh environment, especially overwork and tension, environmental damage and training. At the same time, it promotes the absorption of oxygen by muscles.

To meet the human body's demand for vitamins, we must eat fresh foods rich in vitamins, such as fruits, vegetables and whole wheat products. For people who usually have insufficient vitamin intake and unbalanced diet, they can take vitamin supplements.

Extended data

The definition of vitamins requires that vitamins meet the following four characteristics before they can be called essential vitamins.

Exogenous: the human body cannot synthesize itself and needs food supplement;

Traces: the human body needs little, but it can play a huge role;

Regulatory: vitamins must be able to regulate human metabolism or energy conversion;

Specificity: Without certain vitamins, people will show a unique pathological state.

According to these four characteristics, the human body needs 13 vitamins, which is also commonly known as 13 essential vitamins:

Vitamin a, vitamin b, vitamin c, vitamin d, vitamin h, vitamin p, vitamin PP, vitamin m, vitamin t, vitamin u, water-soluble vitamin.

Causes of vitamin deficiency

1, the food supply is seriously insufficient and the intake is insufficient; Such as: single food, improper storage, cooking damage, etc. For example, folic acid is lost by heat.

2. Reduce absorption and utilization; For example, digestive system diseases or low fat intake affect the absorption of fat-soluble Vit.

3. The demand for vitamins is relatively high; Such as: pregnant women, lactating women, children, special posts, special environmental groups.

Baidu encyclopedia: vitamins