Vitamin

Pronunciation

Definition 1

A nutrient that the body needs in small amounts to function and stay healthy. Sources of vitamins are plant and animal food products and dietary supplements. Some vitamins are made in the human body from food products. Vitamins are either fat-soluble (can dissolve in fats and oils) or water-soluble (can dissolve in water). Excess fat-soluble vitamins are stored in the body’s fatty tissue, but excess water-soluble vitamins are removed in the urine. Examples are vitamin A, vitamin C, and vitamin E. (NCI Dictionary)

Definition 2

A group of organic food substances found in animals and plants in small quantities. They must be supplied in diet or dietary supplement and are essential for normal metabolism. (NCI Thesaurus)

Definition 3

A class of micronutrients that regulate and support chemical reactions in the body. (NCI Thesaurus/CRCH)

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