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.

Vitamin C, also known as ascorbic acid, English name is vitamin C or ascorbic acid. It is an essential nutrient for human beings and a few other organisms. Many animals can synthesize vitamin C from glucose, but people can only get it from food. Vitamin C is also the largest daily requirement of all vitamins (for ordinary adults, the recommended dietary supply of nutrients for most vitamins is less than 20 mg / day, while vitamin C is 100 mg / day).