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Related to Provitamin: Prooxidant, provitamin A carotenoids


A vitamin precursor; assumes vitamin activity upon activation or chemical change.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
The following article is from The Great Soviet Encyclopedia (1979). It might be outdated or ideologically biased.



a biochemical precursor of a vitamin. Provitamin A (carotene), which is synthesized by plant cells, forms the A vitamins in animal cells. Ergosterol and its derivatives form the calciferols, the D vitamins.

The Great Soviet Encyclopedia, 3rd Edition (1970-1979). © 2010 The Gale Group, Inc. All rights reserved.
References in periodicals archive ?
Moisture contents of subjected 17 (16 provitamin A biofortified + 1 local check) maize hybrids at the time of harvesting were estimated using moisture meter (Dickey John MULTIGRAIN) and further drying experiment was conducted to attain the moisture contents ranging 10-12%.
Most sweet potato found in sub-Saharan Africa contains very little provitamin A.
Similarly, the researchers found that compared to a raw carrot meal without avocado, the addition of one avocado significantly increased (12.6 times) the conversion of provitamin A to vitamin A.
The content of [alpha]- and [beta]-carotene is very important because they are provitamin A, but [alpha]-carotene has only one-half of the provitamin activity of [beta]-carotene.
With Lacura, enjoying firmer, fresher, feel-good skin doesn't have to cost a fortune."Packing renowned ingredients like bioflavonoids, coenzyme Q10 (a special Retinol complex), hydrating sea minerals, provitamin B5, aloe vera, vitamins E and C, allantoin and other active extracts, the skin care line retails from $1.99 to $4.99 vs.
The ten chapters cover phytoestrogens, fatty acids in functional foods, flavanoids, anthocyanins, carotenoids and provitamin A, chlorophyll, water-soluble vitamins, amino acid analysis, and carbohydrates and other electrochemically active compounds in functional foods.
A team of plant geneticists and crop scientists pioneers an economical approach to the selective breeding of corn that can boost levels of provitamin A, the precursors that are converted to vitamin A upon consumption.
The claim: 12 fruit juices - orange, apple, grape, pineapple, passion fruit, apricot, banana, mango, peach, guava, pear, lemon - give added vitamins B1, B2, B6, E, C and Provitamin A
Made from sweet potatoes, the chips are high in beta carotene (provitamin A) and also contain vitamin C and potassium.
Sugar Crystal Cream contains vitamins A, E, C and F, provitamin B5, a sugar-based moisturising agent, sucrose emulsifiers, Shea butter, and ginseng.
Now the antiageing formula, which combines Vitamin B3, Vitamin E and ProVitamin B5, is available for the body as well as the face, priced pounds 10.