Relative potencies of vitamin A and carotene for animals.
D000818:Animals; D002338:Carotenoids / Q000378:metabolism / Q000494:pharmacology*; D009566:Nitrates / Q000494:pharmacology; D009573:Nitrites / Q000494:pharmacology; D014801:Vitamin A / Q000378:metabolism / Q000494:pharmacology*
D009566:Nitrates; D009573:Nitrites; D014801:Vitamin A; D002338:Carotenoids