A vitamin is an organic compound required by an organism as a vital nutrient in limited amounts. An organic chemical compound (or related set of compounds) is called a vitamin when it cannot be synthesized in sufficient quantities by an organism, and must be obtained from the diet. Thus, the term is conditional both on the circumstances and on the particular organism.
All stories in Vitamin
Vipul Bansal didn't believe he was getting enough vitamin D. He's not alone. Although figures vary wildly, somewhere between ...