7-dehydrocholesterol(redirected from provitamin D3)
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Related to provitamin D3: provitamin D2
A zoosterol in skin and other animal tissues that on activation by ultraviolet light becomes antirachitic and is then referred to as cholecalciferol (vitamin D3).
Synonym(s): provitamin D3
7-dehydrocholesterol/7-de·hy·dro·cho·les·ter·ol/ (de-hi″dro-kŏ-les´ter-ol) a sterol present in skin which, on ultraviolet irradiation, produces vitamin D.
activated 7-dehydrocholesterol cholecalciferol.
A steroid precursor of vitamin D that converts to the vitamin when skin is exposed to sunlight.