Definitions for vitamin a1
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vitamin A1, retinol(noun)
an unsaturated alcohol that occurs in marine fish-liver oils and is synthesized biologically from carotene
retinol (C20H30O), one of the substances also called vitamin A. It is also called more specifically vitamin A alcohol. It is a required factor for human nutrition. The USP unit of activity is equal to 0.30 micrograms of retinol.
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