Web7-Dehydrocholesterol (7-DHC) is a zoosterol that functions in the serum as a cholesterol precursor, and is photochemically converted to vitamin D 3 in the skin, therefore functioning as provitamin-D 3.The presence of this compound in human skin enables humans to manufacture vitamin D 3 (cholecalciferol) from ultraviolet UV-B rays in the sun light, via … WebProvitamin A-carotenoid. Provitamin A carotenoid and is found in fruits and vegetables. The most abundant provitamin A is beta-carotene. Examples of other provitamins A-carotenoids are alpha-carotene and beta-cryptoxanthin. (source ) The bioavailability of provitamin A-carotenoids in fruit and vegetables is lower than once believed.

Provitamin - definition of provitamin by The Free Dictionary

WebA provitamin is a substance that may be converted within the body to a vitamin. The term previtamin is a synonym. The term "provitamin" is used when it is desirable to label a substance with little or no vitamin activity, but which can be converted to an active form by normal metabolic processes. WebIT is generally acknowledged that the carotenes are 'provitamins', but there is no clear definition of the term 'provitamin' in the literature ; the general view seems to be that it is a compound ... crimen jerusalem 1986

Vitamin A and Carotenoids - Consumer - National Institutes of …

WebOct 4, 2024 · Vitamin A is an important nutrient that benefits health in many ways.. Potent antioxidant. Provitamin A carotenoids such as beta carotene, alpha carotene, and beta … WebProvitamin definition: a substance , such as carotene , that is converted into a vitamin in animal tissues Meaning, pronunciation, translations and examples WebDefine provitamins. provitamins synonyms, provitamins pronunciation, provitamins translation, English dictionary definition of provitamins. n. A vitamin precursor that the … crimen karaoke