title: Beta carotene in congenital porphyria.
mesh_terms: D000293:Adolescent; D002338:Carotenoids / Q000627:therapeutic use*; D002648:Child; D006801:Humans; D008297:Male; D011164:Porphyrias / Q000151:congenital* / Q000188:drug therapy
chemical_list: D002338:Carotenoids