NUTRITION

VitaminA| source, function, diseases, classification and more| home science| food and nutrition|

Vitamin – A vitamin is an organic molecule (or a chemically closely related set of molecules, i.e. vitamers) that is an essential micronutrient which an organism needs in small quantities for the proper functioning of its metabolism. Essential nutrients cannot besynthesized in the organism, either at all or not in sufficient quantities, and therefore must be obtained through the diet.
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