title: Efficiency of conversion of tryptophan to niacin in humans.
mesh_terms: D000328:Adult; D000596:Amino Acids; D001835:Body Weight; D003404:Creatinine / Q000652:urine; D004032:Diet; D004305:Dose-Response Relationship, Drug; D005260:Female; D006801:Humans; D008297:Male; D009536:Niacinamide / Q000652:urine; D009539:Nicotinic Acids / Q000378:metabolism* / Q000652:urine; D009584:Nitrogen / Q000652:urine; D009747:Nutritional Physiological Phenomena; D011726:Pyridinium Compounds / Q000652:urine; D014364:Tryptophan / Q000008:administration & dosage / Q000378:metabolism*
chemical_list: D000596:Amino Acids; D009539:Nicotinic Acids; D011726:Pyridinium Compounds; D009536:Niacinamide; D014364:Tryptophan; D003404:Creatinine; D009584:Nitrogen