Vitamins neither participate in the formation of human cells nor provide energy for the human body, but play an important role in the growth, metabolism and development of the human body.

Vitamins are organic compounds necessary for normal functioning of human organs and maintenance of human life activities. If the human body lacks vitamins, not only the function of human organs will be affected, but also many normal life activities may be hindered. Not only a lack of protein in the human body may produce cancer cells, but a lack of vitamins may also lead to the formation of cancer cells.