A form of vitamin A that is less active than regular retinol but still important for vision and cell growth.
From de- + hydro- + retinol (from retina). Chemical terminology for a dehydrated form of retinol, discovered when analyzing vitamin A metabolism.
Dehydroretinol (vitamin A2) is found in freshwater fish and is about half as powerful as regular retinol—it's why ocean fish are better vitamin A sources!
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