provitamin A


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pro·vi·ta·min A

trivial name for carotenoids exhibiting qualitatively the biologic activity of β-carotene, that is, vitamin A precursors (α-, β-, and γ-carotene and cryptoxanthin); contained in fish liver oils, spinach, carrots, egg yolk, milk products, and other green leaf or yellow vegetables and fruits.

pro·vi·ta·min A

(prō'vī'tă-min)
Carotenoid precursors of vitamin A found in some red and yellow fruits and vegetables.

provitamin A

generic term for all vitamin A precursors; same biological activity as beta-carotene

provitamin

a substance, e.g. ergosterol, from which the animal organism can form a vitamin.

provitamin A
References in periodicals archive ?
The first study investigated if fresh avocado, when eaten with high beta-carotene tomato sauce, would promote the absorption of provitamin A carotenoids, and the conversion of these carotenoids to an active form of vitamin A.
The results also provide promising clues and a basis for future research to determine avocados' effect on the conversion of provitamin A to vitamin A.
have engineered a tomato plant that contains altered proportions of carotenoids--specifically, elevated levels of beta-carotene provitamin A carotenoid.
Tropicana Multivitamins is a 100% pure pressed juice from twelve fruits - orange, grape, pineapple, passion fruit, apricot, banana, mango, peach, guava, pear and lemon, and boasts the benefits of Vitamins C, E, Be, B2, B1 and provitamin A.