Vitamins, which refers to a series of organic compounds collectively, is a class of micro-organic substances necessary for humans and animals to maintain normal physiological functions, most of which can not be produced by the organism itself and must be ingested from food, and only a small number of which can be synthesised in the body or produced by intestinal microorganisms. It plays an important role in human growth, metabolism and development, and is one of the six major nutrients (sugar, fat, protein, inorganic salts, vitamins and water) in the human body.

The nutritional components of tissue culture medium, feed additives and food additives.

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