Question

$\beta$-carotene is

• A. Preformed vitamin A
• B. Provitamin A
• C. Synthetic vitamin A
• D. None of the above

Answer 1

The correct option is B Provitamin A

Two forms of vitamin A are available in the human diet: preformed vitamin A (retinol and its esterified form, retinyl ester) and provitamin A carotenoids. Preformed vitamin A is found in foods from animal sources, including dairy products, fish, and meat (especially liver). The most important provitamin A carotenoid is beta-carotene; other provitamin A carotenoids are alpha-carotene and beta-cryptoxanthin.