provitamin (redirected from provitamin D3)

provitamin /pro·vi·ta·min/ (-vi´tah-min) a precursor of a vitamin.

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provitamin A  usually β-carotene, sometimes including any of the provitamin A carotenoids.

provitamin D2  ergosterol.

provitamin D3  7-dehydrocholesterol.

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pro·vi·ta·min (pr-vt-mn)

n.

A vitamin precursor that is converted to its active form through normal metabolic processes.

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provitamin

[prōvī′təmin]

a precursor of a vitamin; a substance found in certain foods that in the body may be converted into a vitamin. Also called previtamin.

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provitamin (prōvī´tmin),

n a substance in food that may be transformed into a vitamin within the body; a potential vitamin.

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provitamin

a substance, e.g. ergosterol, from which the animal organism can form a vitamin.

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provitamin A

see carotene.