The role of vitamin B is as follows: first, to promote the metabolism of the body’s liver, for the liver of drinkers can play a protective role, because the vitamin B vitamins and the liver have a close link. Second, improve the symptoms of depression in the body, because vitamin B1, vitamin B2, vitamin B6 can effectively treat depression in the elderly. Thirdly, it helps the body to digest. Fourth, it can prevent megaloblastic anemia caused by primary or secondary vitamin B12 deficiency. The organism is prone to several side effects of vitamin B supplementation in large amounts, such as mental depression, nausea, rhinitis, etc. When supplementing vitamins, pay attention to the dosage as well as to your own symptoms. Large amounts of supplementation can cause the opposite result, and it is recommended to use the medication under the guidance of a doctor and not to take it blindly on your own. In daily life, you can eat more vitamin-rich foods, such as apples, bananas, strawberries, etc., which are helpful in promoting health.