title: The vitamin B6 requirement in oral contraceptive users. II. Assessment by tryptophan metabolites, vitamin B6, and pyridoxic acid levels in urine.
mesh_terms: D000293:Adolescent; D000328:Adult; D003276:Contraceptives, Oral / Q000494:pharmacology*; D003280:Contraceptives, Oral, Synthetic / Q000494:pharmacology*; D005260:Female; D006801:Humans; D007539:Isonicotinic Acids / Q000652:urine*; D007736:Kynurenic Acid / Q000652:urine; D007737:Kynurenine / Q000031:analogs & derivatives / Q000652:urine; D009751:Nutritional Requirements; D011735:Pyridoxic Acid / Q000652:urine*; D011736:Pyridoxine / Q000378:metabolism* / Q000627:therapeutic use / Q000652:urine; D014364:Tryptophan / Q000378:metabolism*; D026681:Vitamin B 6 Deficiency / Q000188:drug therapy / Q000378:metabolism; D014977:Xanthurenates / Q000652:urine
chemical_list: D003276:Contraceptives, Oral; D003280:Contraceptives, Oral, Synthetic; D007539:Isonicotinic Acids; D014977:Xanthurenates; D007737:Kynurenine; D011735:Pyridoxic Acid; D014364:Tryptophan; D007736:Kynurenic Acid; D011736:Pyridoxine