provitamin

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Related to provitamin D3: provitamin D2

pro·vi·ta·min

 (prō-vī′tə-mĭn)
n.
A vitamin precursor that the body converts to its active form through normal metabolic processes. Carotene, for example, is a provitamin of vitamin A.

provitamin

(prəʊˈvɪtəmɪn)
n
(Biochemistry) a substance, such as carotene, that is converted into a vitamin in animal tissues

pro•vi•ta•min

(proʊˈvaɪ tə mɪn; Brit. also proʊˈvɪt ə mɪn)

n.
a substance that an organism can transform into a vitamin, as carotene, which is converted to vitamin A in the liver.
[1925–30]
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.provitamin - vitamin precursor; a substance that is converted into a vitamin in animal tissues
hydrocarbon - an organic compound containing only carbon and hydrogen
carotene, carotin, provitamin A - an orange isomer of an unsaturated hydrocarbon found in many plants; is converted into vitamin A in the liver
References in periodicals archive ?
Furthermore, today's formulas block the production of provitamin D3 in the skin and he noted that low vitamin D levels are rampant in the US, although that may be more of a function of living life indoors glued to a cellphone, rather than getting out into the great outdoors.
The precursor of vitamin D3 is 7-dehydrocholesterol also known as provitamin D3.
Upon exposure to sunlight, dermal provitamin D3 is converted to previtamin D3, which is then converted to vitamin D3.