What are vitamins?

Vitamins are the non-energy supplying nutrients that are essential for us to live. Vitamins are needed for their biochemical function in the body. Each vitamin is needed for multiple chemical reactions, but only in small amounts (thus the name ‘micronutrient’). Vitamins are excipients for enzymes, which are necessary for many of the vital processes in the body. We get vitamins from what we eat and drink.