What is a precursor for Vitamin A?

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Multiple Choice

What is a precursor for Vitamin A?

Explanation:
A provitamin A carotenoid called beta-carotene functions as the precursor to vitamin A. It’s found in colorful vegetables and fruits, and the body converts it in the intestinal lining and liver into active retinol as needed. This distinguishes it from the other substances listed—vitamin D and vitamin E are separate vitamins, and lutein is another carotenoid that supports eye health but is not converted to vitamin A in humans. Understanding that beta-carotene is an inactive form that provides vitamin A after conversion explains why it’s the precursor.

A provitamin A carotenoid called beta-carotene functions as the precursor to vitamin A. It’s found in colorful vegetables and fruits, and the body converts it in the intestinal lining and liver into active retinol as needed. This distinguishes it from the other substances listed—vitamin D and vitamin E are separate vitamins, and lutein is another carotenoid that supports eye health but is not converted to vitamin A in humans. Understanding that beta-carotene is an inactive form that provides vitamin A after conversion explains why it’s the precursor.

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