Dictionary

Vitamins

Vitamins, with some exceptions, heterotrophic organisms are not able to produce themselves and therefore have to obtain them through diet. Some vitamins can be obtained by metabolism by provitamins; for example, the body's ability to obtain vitamin A from provitamin A. Vitamins are essential for the growth and viability of all heterotrophic organisms. In the human body, they are primarily the catalysts of biochemical reactions.

Depending on the solubility, we divide the vitamins into fat…