title: Vitamin A metabolism and requirements in the human studied with the use of labeled retinol.
mesh_terms: D000085:Acetates / Q000008:administration & dosage; D000293:Adolescent; D000328:Adult; D002250:Carbon Radioisotopes; D002338:Carotenoids / Q000627:therapeutic use; D002648:Child; D002675:Child, Preschool; D003623:Dark Adaptation; D004032:Diet; D005260:Female; D006801:Humans; D007642:Keratosis / Q000209:etiology; D008099:Liver / Q000378:metabolism; D008297:Male; D009751:Nutritional Requirements; D012164:Retinal Diseases / Q000209:etiology; D012737:Sex Factors; D014801:Vitamin A / Q000008:administration & dosage / Q000378:metabolism / Q000627:therapeutic use; D014802:Vitamin A Deficiency / Q000150:complications / Q000188:drug therapy / Q000378:metabolism
chemical_list: D000085:Acetates; D002250:Carbon Radioisotopes; D014801:Vitamin A; D002338:Carotenoids