title: Tryptophan metabolism, oral contraceptives, and pyridoxine.
mesh_terms: D003276:Contraceptives, Oral / Q000378:metabolism*; D005260:Female; D006801:Humans; D011736:Pyridoxine / Q000378:metabolism; D014364:Tryptophan / Q000378:metabolism*
chemical_list: D003276:Contraceptives, Oral; D014364:Tryptophan; D011736:Pyridoxine