Vitamin A Compound

Definition 1

A nutrient that the body needs in small amounts to function and stay healthy. Vitamin A helps in vision, bone growth, reproduction, growth of epithelium (cells that line the internal and external surfaces of the body), and fighting infections. It is fat-soluble (can dissolve in fats and oils). Vitamin A is found in liver, egg yolks, and whole milk dairy products from animals and in fish oils. It can also be made in the body from a substance found in some fruits and vegetables, such as cantaloupes, carrots, spinach, and sweet potatoes. Vitamin A is being studied in the prevention and treatment of some types of cancer. (NCI Dictionary)

Definition 2

Fat-soluble vitamin consisting of 20 carbons with a methyl-substituted cyclic ring on one end of a hydrocarbon chain with 4 double bonds and either a hydroxyl, aldehyde, or carboxylic acid group on the other end. (NCI Thesaurus/CRCH)

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