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provitamin A

Origin of provitamin A
First recorded in 1950-55 Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2017.
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provitamin A in Medicine

provitamin A n.
Any of the carotenoids that are precursors of vitamin A and exhibit qualitatively the biological activity of beta-carotene; they are present in fish-liver oils, egg yolk, milk products, and green-leaf or yellow vegetables and fruits.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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