There are more than a dozen types of vitamin B, collectively known as the B vitamins. If you need to use B vitamins, you should take into account your own symptoms and determine the dosage under the guidance of your doctor, and do not take the medication on your own to avoid side effects. In general, vitamin B has the function of increasing appetite, maintaining nerve function, promoting growth and development, protecting skin and mucous membranes, inhibiting melanin production, helping liver detoxification, etc. 1, increase appetite: vitamin B1, B6, B12 is conducive to food absorption and protein synthesis, while increasing the secretion of digestive juices, promote gastrointestinal motility, to promote digestion, but also to a certain extent to relieve Vomiting, nausea and other gastrointestinal symptoms; 2, maintain nerve function: vitamin B1, B12 has the role of nerve nutrition, can act on the central and peripheral nerves, and promote the repair of nerve tissue. In addition to being able to improve the body’s tolerance of noise, relieve certain anxiety and tension, but also help improve memory; 3, promote growth and development: vitamin B6, B7, B12 can improve the amount of oxygen to bones, skin and epithelial tissue, help fat, protein and other absorption of metabolic energy, involved in the production of cells, can promote normal growth and development; 4, protect the skin and mucous membrane: vitamin B2, B3 involved in the body’s red blood cell formation and antibody manufacturing, can act on the skin, help skin tissue metabolism, to avoid pellagra, tongue swelling, dermatitis, foot odor, facial acne and other diseases; 5, inhibit melanin production: vitamin B3, B6, B12 can make damaged cells recover faster, adjust the skin wrinkles, dullness, dark spots and other problems, but also to maintain normal blood circulation, thus improve the symptoms of anemia; 6. Help detoxify the liver: Vitamin B2 can reduce the aggression of ethanol and nicotine on the body, which can protect the liver to a certain extent, promote the metabolism of the liver, repair the function of the liver and prevent the occurrence of alcoholic liver. In addition, vitamin B also has the function of improving gout and headache, reducing the risk of stroke, preventing the three highs (high blood pressure, high blood fat, high blood sugar) and Alzheimer’s disease.