Some aspects of tryptophan metabolism in human subjects. II. Urinary tryptophan metabolites on a low-niacin diet.
D004032:Diet; D006801:Humans; D009525:Niacin / Q000172:deficiency*; D014364:Tryptophan / Q000652:urine*
D009525:Niacin; D014364:Tryptophan
NICOTINIC ACID/deficiency; TRYPTOPHAN/in urine