pro·​vi·​ta·​min (ˌ)prō-ˈvī-tə-mən How to pronounce provitamin (audio)
: a precursor of a vitamin convertible into the vitamin in an organism

Examples of provitamin in a Sentence

Recent Examples on the Web The researchers blocked a gene in tomato plants that normally converts provitamin D3 into cholesterol, which enabled provitamin D3 to accumulate in the ripe tomato fruit. Katie Hunt, CNN, 23 May 2022 Rocheford, a plant geneticist at Purdue, drew the attention of the U.S. Agency for International Development (USAID) for his research on variations affecting provitamin A carotenoids — naturally occurring plant pigments that our bodies can convert to vitamin A — in maize. Jim Sullivan, Discover Magazine, 30 Apr. 2015 No doubt this is in part due to the inclusion of panthenol (a provitamin of B5) which acts as a humectant to draw moisture into the hair strand. Good Housekeeping, 13 Mar. 2023 It’s powered by dexpanthenol (or provitamin B5), which helps improve hydration, reduce water loss, limit irritation, and stimulate wound healing. Sam Peters, ELLE, 16 Feb. 2023 The pencil has been infused with some of the same restorative ingredients that each of the previous brow products have, including castor oil and provitamin B5 for growth and regeneration. Alyssa Brascia, Peoplemag, 30 Sep. 2022 This pick has provitamin B5 and serin, which are ingredients known for its lash-conditioning attributes. Daisy Maldonado, SELF, 13 Sep. 2022 To convert the provitamin D3 into vitamin D3 that helps our bodies, the tomatoes were treated with UVB light. Katie Hunt, CNN, 23 May 2022 Ingredients like biotin, peptides, hyaluronic acid, and panthenol (a provitamin of B5) come together in this formula from neuLash, which also contains pumpkin seed extract for lashes that look thicker and fuller., 16 Sep. 2021 See More

These examples are programmatically compiled from various online sources to illustrate current usage of the word 'provitamin.' Any opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback about these examples.

Word History

First Known Use

1927, in the meaning defined above

Time Traveler
The first known use of provitamin was in 1927

Dictionary Entries Near provitamin

Cite this Entry

“Provitamin.” Dictionary, Merriam-Webster, Accessed 11 Dec. 2023.

Medical Definition


pro·​vi·​ta·​min (ˈ)prō-ˈvīt-ə-mən How to pronounce provitamin (audio)
: a precursor of a vitamin convertible into the vitamin in an organism
ergosterol is a provitamin of vitamin D

More from Merriam-Webster on provitamin

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