title: Letter: Dark urine after hair coloring.
mesh_terms: D000814:Aniline Compounds / Q000378:metabolism / Q000494:pharmacology / Q000652:urine; D003116:Color; D004396:Coloring Agents / Q000494:pharmacology*; D003358:Cosmetics / Q000494:pharmacology*; D005260:Female; D006197:Hair; D006801:Humans; D008875:Middle Aged; D012535:Scalp / Q000378:metabolism; D012869:Skin Absorption; D014556:Urine
chemical_list: D000814:Aniline Compounds; D004396:Coloring Agents; D003358:Cosmetics