Any substance has a two-sided nature, the same is true of drugs, vitamins, vitamins are an indispensable element of the body, take too much, it will bring a lot of harm to the body, such as vitamin B take too much will appear the following side effects, if menopausal women take vitamin B too much, there will be an endocrine disorders, dark color, poor mood, if the elderly If the elderly take B vitamins, if the overdose, there will be poor mental state, low immunity, unstable blood pressure and other side effects, if children take B vitamins if the overdose there will be developmental delays in the side effects, if pregnant women take B vitamins, if the overdose will affect the baby's health and development inside the stomach, for the normal body of the people, take B vitamins overdose there will be nausea and vomiting, memory loss side effects of the above mentioned. Memory loss side effects of the above mentioned is the side effects of vitamin B, visible vitamin B in the improvement of physical disease at the same time, but also to the body to bring certain side effects, so in the daily use of the amount of time must control the amount of dosage, once too much, then it will damage the health of the body.