Function: It is related to vision, and can maintain the normal function of mucosa and regulate the skin condition. Helping human growth and tissue repair is very important for eye care. It can resist bacteria and avoid infection, protect the health of epithelial tissue and promote the development of bones and teeth.

Deficiencies: night blindness, dry eyes, dry skin and itching.

Main food sources: carrots, green leafy vegetables, egg yolk and liver.

2. Vitamin B 1

Function: strengthen the nervous system and ensure the normal activity of the heart. Promoting carbohydrate metabolism can maintain the health of nervous system, stabilize appetite, stimulate growth and maintain good muscle state.

Deficiencies: depression, gastrointestinal discomfort, numbness of hands and feet, beriberi.

3, vitamin B2

Function: Also known as riboflavin, it participates in a wide range of metabolic processes in the body, maintains eye vision, prevents excessive leucorrhea, and maintains the health of oral cavity and digestive tract mucosa. Promote the metabolism of carbohydrate, fat and protein, help to form antibodies and red blood cells, and maintain cell respiration.

Deficiency: when lacking, there will be excessive internal heat, angular stomatitis, seborrheic dermatitis and so on. Severe cases may also cause conjunctivitis, blepharitis, corneal vascular hyperplasia, photophobia and other symptoms.

Main food sources: egg yolk, river crab, eel, laver, etc.

4. Vitamin B 12

Function: This is a kind of vitamin that is almost not contained in plant food, and it is the vitamin that vegetarians are most likely to lack.

Deficiency: It is an indispensable and important element in erythropoiesis, and serious deficiency will lead to pernicious anemia.

5, vitamin C.

Function: A vitamin with the largest demand for human body has the function of preventing and treating scurvy, so it is also called ascorbic acid. Its main function is to protect, regulate and promote the catalysis of enzyme system, and it is also a strong antioxidant, which can prevent peroxidation in vivo and protect cardiovascular and cerebrovascular diseases.

In addition, it also assists the absorption of iron and calcium and the utilization of folic acid in the body, and also plays an important role in preventing atherosclerosis and lowering cholesterol.

Main food sources: Vitamin C mainly exists in fresh vegetables, fruits and other foods.

People's Network-One minute to see which vitamins you lack.