Vitamins are necessary to maintain children's growth and development and regulate normal physiological functions. Although the amount of various vitamins needed by the human body every day is very small, diseases will occur without some vitamins. (1) Vitamin A: It is necessary to maintain normal vision and the integrity of skin mucosal epithelial cells. The latest research shows that vitamin A has anti-infection effect and can reduce the incidence of respiratory tract infection and diarrhea. Egg yolk, cream and animal liver are rich in vitamin A. Carotene in colored vegetables and tomatoes can be converted into vitamin A after absorption. (2) Vitamin B includes vitamin B 1, B2, B6, B 12, nicotinamide and folic acid, which are necessary for maintaining metabolism and growth in vivo. If you lack B vitamins, you will get beriberi and have symptoms of digestive nerve and heart. It is prone to angular stomatitis, glossitis, skin erythema and herpes, neonatal spasm and nutritional giant cell anemia. Beans, wheat bran, liver, egg yolk, fish, meat and green leafy plants are rich in vitamin B. (3) Vitamin C: Without vitamin C, it is easy to bleed, especially gums and nosebleeds. Fresh vegetables and fruits contain more, but if vegetables are cooked for too long, vitamin C will be destroyed. (4) Vitamin D: Lack of vitamin D will affect the absorption of calcium and phosphorus, affect the growth of bones and easily lead to "rickets". Breast milk and milk contain less vitamin D and need to be supplemented every day. (5) Vitamin E: It is related to metabolism in the body, and mild anemia, edema and anti-rash may occur when lacking. Wheat germ oil is rich in vitamin E. Modern medical research shows that vitamin has a very important influence on children's anti-infection immunity and plays a very important role in regulating and maintaining human immune system. Because of the unreasonable diet structure, vitamin A, vitamin B4, vitamin B 12, vitamin C and vitamin D are obviously lacking. In this case, the child's immunity to infection will be destroyed, and it is easy to suffer from various diseases, such as respiratory tract and digestive tract infections. At present, the main vitamins found in medicine are: fat-soluble vitamin A. Maintain normal vision and prevent night blindness; Maintain the health of epithelial cells; Promote growth and development; Enhance resistance to infectious diseases; Prevention and treatment of dry eye. Vitamin D regulates calcium and phosphorus metabolism, promotes absorption and utilization, and promotes bone growth. Vitamin E. Maintain normal reproductive capacity and normal muscle metabolism; Maintain the integrity of the central nervous system and vascular system. Vitamin k stops bleeding. It is not only the main component of prothrombin, but also can promote the production of prothrombin in the liver. Water-soluble vitamin B 1 in children with vitamin k deficiency. Maintain the normal functions of circulation, digestion, nerves and muscles; Regulating gastrointestinal function; Coenzymes forming decarboxylase participate in sugar metabolism; It can prevent beriberi. Vitamin B2. Also known as riboflavin. Nucleoprotein is a component of many important coenzymes in the body. These enzymes can transfer hydrogen during the metabolism of substances in the body, and are also essential substances for the metabolism, energy utilization and composition of protein, sugar and fatty acids. Can promote growth and development, and protect eye and skin health. Pantothenic acid (calcium pantothenate). Anti-stress, anti-cold, anti-infection, prevent the toxicity of some antibiotics, and eliminate postoperative abdominal distension. Vitamin B6. It plays an important role in protein metabolism. Treat neurasthenia, vertigo, atherosclerosis, etc. Vitamin B 12. Anti-fatty liver, promote liver to store vitamin A; Promote cell development and maturation and body metabolism; Treat pernicious anemia. Vitamin B 13 (lactic acid clear). Vitamin B 15 (pantothenic acid). It is mainly used to resist fatty liver and improve the oxygen metabolism rate of tissues. Sometimes used to treat coronary heart disease and chronic alcoholism. Vitamin B 17. Highly toxic. Some people think it can control and prevent cancer. P-aminobenzoic acid. Among the B vitamins, it is one of the newly discovered vitamins. Can be synthesized in the human body. Inositol. One of the B vitamins, like choline, is a lipophilic vitamin. Vitamin C. Structure connecting bones, teeth and connective tissue; It has adhesion to capillary wall cells; Increase antibodies and enhance resistance; Promote red blood cell maturation. Vitamin P. Vitamin PP (nicotinic acid) plays the role of transferring hydrogen in the process of cell physiological oxidation and has the role of preventing and treating furuncle. Folic acid (vitamin m). Antianemia; Maintain the normal growth of cells and the function of immune system. Vitamin T helps blood coagulation and platelet formation. Vitamin u. It plays an important role in treating ulcers.