Provitamin

A provitamin is a substance that may be converted within the body to a vitamin. The term "previtamin" is a synonym. For example, Provitamin B5 is a name for Panthenol, which may be converted in the body to Pantothenic Acid (Vitamin B5). The term "provitamin" is used when it is desirable to label a substance with little or no vitamin activity, ...
Found on http://en.wikipedia.org/wiki/Provitamin

provitamin

[n] - vitamin precursor
Found on http://www.webdictionary.co.uk/definition.php?query=provitamin

provitamin

A chemical that becomes a vitaminvia a natural reaction within anorganism, such as when 7-dehydrocholesterol in the skin becomes vitamin Dwhen its exposed to sunlight. ... (09 Oct 1997) ...
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provitamin

noun vitamin precursor; a substance that is converted into a vitamin in animal tissues
Found on http://wordnetweb.princeton.edu/perl/webwn?s=provitamin

provitamin

(pro-vi´tә-min) a substance (such as ergosterol) from which an animal organism can form a vitamin.
Found on http://www.encyclo.co.uk/local/21001

provitamin

(from the article `vitamin`) ...and cholecalciferol (vitamin D3). Vitamin D3 represents the dietary source, while vitamin D2 occurs in yeasts and fungi. Both can be formed from ...
Found on http://www.britannica.com/eb/a-z/p/125

provitamin

Type: Term Pronunciation: prō-vī′tă-min Definitions: 1. A substance that can be converted into a vitamin; β-carotene.
Found on http://www.medilexicon.com/medicaldictionary.php?t=73212

provitamin

Any precursor substance of a vitamin. Provitamins are ingested substances that become converted to active vitamins within the organism. One example is ergosterol (provitamin D2), which through the action of sunlight is converted to calciferol (vitamin D2); another example is beta-carotene, which...
Found on http://www.talktalk.co.uk/reference/encyclopaedia/hutchinson/m0028556.html
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