- provitamin A carotenoids
- carotenoids, particularly the carotenes and cryptoxanthin, that can be converted to vitamin A in the body; they are a major source of vitamin A in a normal diet.
Medical dictionary. 2011.
provitamin A carotenoids
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provitamin A — n a provitamin of vitamin A esp CAROTENE * * * usually β carotene; however, the term is sometimes used more broadly to denote any of the provitamin A carotenoids … Medical dictionary
provitamin — A substance that can be converted into a vitamin; e.g., β carotene. p. A trivial name for carotenoids exhibiting qualitatively the biologic activity of β carotene, i.e., vitamin A precursors (α , β , and γ carotene and cryptoxanthin); contained… … Medical dictionary
Vitamin A — Systematic (IUPAC) name (2E,4E,6E,8E) 3,7 Dimethyl … Wikipedia
Mango — This article is about the fruit. For other meanings of the word, see Mango (disambiguation). Australian Mango with its cross section … Wikipedia
carotene — A class of carotenoids, yellow red pigments (lipochromes) widely distributed in plants and animals, notably in carrots, and closely related in structure to the xanthophylls and lycopenes and to the open chain squalene; of particular interest in… … Medical dictionary
Vitamin A — is retinol. Carotene compounds (found, for example, in egg yolk, butter and cream) are gradually converted by the body to vitamin A (retinol). A form of vitamin A called retinal is responsible for transmitting light sensation in the retina of the … Medical dictionary
vitamin — One of a group of organic substances, present in minute amounts in natural foodstuffs, that are essential to normal metabolism; insufficient amounts in the diet may cause deficiency diseases. [L. vita, life, + amine] v. A 1. any β … Medical dictionary
retinol equivalent — (RE) the specific biological activity of 1.0 microgram of all trans retinol, 6.0 micrograms of β carotene, or 12.0 micrograms of other provitamin A carotenoids; it is equivalent to 3.3 international units of vitamin A activity from retinol… … Medical dictionary
international unit of vitamin A — an older unit of vitamin A activity, equal to the activity of 0.3 microgram retinol or 0.6 microgram β carotene; because the provitamin A carotenoids are absorbed less efficiently than is retinol, the source must be specified. Although… … Medical dictionary
Carotenoid — Carotenoids are organic pigments that are naturally occurring in chromoplasts of plants and some other photosynthetic organisms like algae, some types of fungus and some bacteria.There are over 600 known carotenoids; they are split into two… … Wikipedia
