2, promote the development and maturity of red blood cells, make the hematopoietic function of the body in a normal state, and prevent pernicious anemia; Keep the nervous system healthy.

3. Being in the form of coenzyme can improve the utilization rate of folic acid and promote the metabolism of carbohydrate, fat and protein.

4. It can activate amino acids and promote the biosynthesis of nucleic acids, thus promoting the synthesis of protein, which plays an important role in the growth and development of infants.

5. Metabolism of fatty acids, so that fat, carbohydrates and protein can be properly utilized by the body.

6, eliminate irritability, concentrate, enhance memory and balance.

7. It is an indispensable vitamin for the sound function of the nervous system and participates in the formation of lipoproteins in nervous tissues.

Extended data:

Special preventive measures

1, the elderly, vegetarians and people who don't eat eggs and dairy products must supplement vitamin b12; ;

2. It is very important to supplement vitamin B 12 if you often socialize and drink a lot;

3. It is very beneficial to supplement vitamin B 12 during or before menstruation;

4. Pregnant women and lactating women should also be added.

5. The combination with chloramphenicol should be avoided, otherwise the hematopoietic function of vitamin B 12 can be offset;

6. In vitro experiments show that vitamin C can destroy vitamin B 12, and taking vitamin C at the same time or taking it in large quantities for a long time can reduce the blood concentration of vitamin B 12;

7. Aminoglycoside antibiotics and anticonvulsants such as p-aminosalicylic acid, phenobarbital, phenytoin sodium, primidone and colchicine can reduce the absorption of vitamin B 12 from the intestine;

8, cholestyramine can be combined with vitamin B 12 to reduce its absorption.

Baidu Encyclopedia-Vitamin B 12