provitamin
noun
pro·vi·ta·min
(ˌ)prō-ˈvī-tə-mən 
: a precursor of a vitamin convertible into the vitamin in an organism
Examples of provitamin in a Sentence
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RDAs come in micrograms of retinol activity equivalents because different retinol and provitamin A carotenoids have different bioactivities and result in different levels of retinol in the body.
—
Bruce Y. Lee, Forbes.com, 5 Apr. 2025
Retinol is a form of vitamin A, so the proponents of this trend advocate for eating foods rich in vitamin A or beta-carotene, a provitamin the body converts into retinol.123
Fruits and vegetables with yellow, orange, and green hues—such as carrots and papayas—contain high amounts of beta-carotene.
—Stephanie Brown, Verywell Health, 17 Mar. 2025
Kale is rich in nutrients that may enhance immune function, such as vitamin C, manganese, magnesium, folate, and provitamin A carotenoids.4
Kale is high in folate, a nutrient that supports the production of T-cells.
—Jillian Kubala, Health, 16 Dec. 2024
Essential hair care ingredients infused in the formula—think castor oil, panthenol provitamin B5, and Biotinoyl Tripeptide-1—condition each strand, supporting your current brow health and promoting future growth.
—Katie Decker-Jacoby, StyleCaster, 18 June 2024
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Bruce Y. Lee, Forbes.com, 5 Apr. 2025
Retinol is a form of vitamin A, so the proponents of this trend advocate for eating foods rich in vitamin A or beta-carotene, a provitamin the body converts into retinol.123
Fruits and vegetables with yellow, orange, and green hues—such as carrots and papayas—contain high amounts of beta-carotene.
—Stephanie Brown, Verywell Health, 17 Mar. 2025
Kale is rich in nutrients that may enhance immune function, such as vitamin C, manganese, magnesium, folate, and provitamin A carotenoids.4
Kale is high in folate, a nutrient that supports the production of T-cells.
—Jillian Kubala, Health, 16 Dec. 2024
Essential hair care ingredients infused in the formula—think castor oil, panthenol provitamin B5, and Biotinoyl Tripeptide-1—condition each strand, supporting your current brow health and promoting future growth.
—Katie Decker-Jacoby, StyleCaster, 18 June 2024
Cite this Entry
“Provitamin.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/provitamin. Accessed 31 Oct. 2025.
Copy CitationMedical Definition
provitamin
noun
pro·vi·ta·min
(ˈ)prō-ˈvīt-ə-mən
: a precursor of a vitamin convertible into the vitamin in an organism
ergosterol is a provitamin of vitamin D
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