title: [Natural and synthetic vitamins--their biological effectiveness with special reference to vitamin C and carotene].
mesh_terms: D001205:Ascorbic Acid / Q000494:pharmacology*; D002338:Carotenoids / Q000494:pharmacology*; D006801:Humans; D014801:Vitamin A; D014812:Vitamin K; D014815:Vitamins
chemical_list: D014815:Vitamins; D014801:Vitamin A; D014812:Vitamin K; D002338:Carotenoids; D001205:Ascorbic Acid
keywords: CAROTENE/pharmacology; VITAMIN C/pharmacology