Which of the following substances is a provitamin or a precursor for a vitamin?

Question

Quizplus · Accepted Answer

Beta-carotene is a provitamin or a precursor for vitamin A. Once it is converted to vitamin A in the body, it functions in maintaining healthy vision, immune function, and skin health. Collagen is a protein found in skin and connective tissues, biotin is a B vitamin important for hair, skin, and nail health, and alpha-tocopherol is a form of vitamin E known for its antioxidant properties, but none of them are provitamins or precursors for other vitamins.

Which of the Following Substances Is a Provitamin or a Precursor