title: Metabolism of tryptophan and niacin in oral contraceptives users receiving controlled intakes of vitamin B6.
mesh_terms: D003276:Contraceptives, Oral / Q000494:pharmacology*; D003278:Contraceptives, Oral, Hormonal / Q000494:pharmacology*; D005260:Female; D006801:Humans; D007736:Kynurenic Acid / Q000652:urine; D007737:Kynurenine / Q000032:analysis / Q000652:urine; D009539:Nicotinic Acids / Q000378:metabolism*; D011736:Pyridoxine / Q000627:therapeutic use; D014364:Tryptophan / Q000378:metabolism*; D026681:Vitamin B 6 Deficiency / Q000188:drug therapy / Q000378:metabolism*; D014977:Xanthurenates / Q000652:urine
chemical_list: D003276:Contraceptives, Oral; D003278:Contraceptives, Oral, Hormonal; D009539:Nicotinic Acids; D014977:Xanthurenates; D007737:Kynurenine; D014364:Tryptophan; D007736:Kynurenic Acid; D011736:Pyridoxine