Provitamin

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provitamin

[prō′vīd·ə·mən]
(biochemistry)
A vitamin precursor; assumes vitamin activity upon activation or chemical change.

Provitamin

 

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.

References in periodicals archive ?
Tenders are invited for code 21.10.5 provitamins, vitamins and hormones; glycosides and vegetable alkaloids and their derivatives; antibiotics, three lots Lot number 1 - 21.10.54-00.00 antibiotics; Lot 2- 21.10.54-00.00 antibiotics; Lot 3- 21.10.54-00.00 antibiotics;
Tenders are invited for 21.10.51-00.00 - provitamins, vitamins and their derivatives; 10/21/52 -00.00 - hormones, derivatives of these substances; other steroids that they are used primarily as hormones; 21.10.54-00.00 - antibiotics
Tenders are invited for pro, vitamins and hormones; glycosides and vegetable alkaloids and their derivatives; antibiotics (hypoglycemic drugs, vitamins and hormones, glycosides and alkaloids, antibiotics) (Hormones, derivatives of these compounds; other steroids that they are used primarily as hormones 21.10.52-00.00; 21.10.54-00.00 antibiotics, provitamins, vitamins and their derivatives 21.10.51-00.00) (2 lots) (lot)1-glucose-lowering drugs, Lot 2-vitamins and hormones, alkaloids and antibiotics)
Tenders are invited for Preparations medicines Lot number 1 - Medicines contents of vitamins, provitamins, derivatives and mixtures of these substances, therapeutic or prophylactic pryznachenosti, dosed or packaged for retail trade (21.20.13-60.00); Lot number 2 - Drugs contents of other antibiotics, put up for retail sale.