VITAMINS

"Vitamin" is a special term in nutrition, it refers to a series of organic compounds, is a class of trace organic substances necessary for human and animal to maintain normal physiological functions, most of which cannot be produced by the organism itself, must be ingested from food, only a few can be synthesized in the body or produced by intestinal microbes. It plays an important role in the process of human growth, metabolism and development, and is one of the six major nutrients in the human body (sugar, fat, protein, inorganic salts, vitamins and water).