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.