Because β-carotene can be converted into retinol,plant sources are referred to as preformed vitamin A.

Name: Because β-carotene can be converted into retinol,plant sources are referred to as preformed vitamin A.
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Quizplus · Accepted Answer

Plant sources of vitamin A are not considered preformed because they contain provitamin A carotenoids, such as β-carotene, that need to be converted into active retinol by the body. Preformed vitamin A is obtained directly from animal sources and is already in its active retinol form.

Because β-Carotene Can Be Converted into Retinol,plant Sources Are Referred