A vitamin is an organic compound needed as a nutrient in small amounts by an organism.[1] to explain, an organic chemical compound is known as a vitamin when it can’t be synthesized in acceptable quantities by an organism, and must be acquired from the diet. Therefore , the term is conditional both on the circumstances and on the specific organism.

 As an example, ascorbic acid ( vitamin C ) is a vitamin for humans, though not for most other animals, and biotin and vitamin D are needed in the human diet only in certain circumstances.

By convention, the term vitamin doesn’t include other necessary nutrient elements like nutritional minerals, necessary trans-acids, or necessary amino acids ( which are required in bigger amounts than vitamins ), and it does not incorporate the giant number of other nutrient elements that push health but are otherwise needed less often.[2] 13 vitamins are currently commonly recognised. Vitamins are classified by their biological and chemical activity, not their structure. So , each “vitamin” pertains to several vitamer compounds that all show the biological activity linked with a specific vitamin. [Read more...]