SEARCH Articles Figures Tables Metabolite excretion rates Metabolite excretion rates equations Niacin, absorption metabolite excretion Optimization metabolite-excretion rates Smokeless tobacco urinary metabolites, excretion Spontaneous Excretion of Tryptophan Metabolites in 28 Patients with Hodgkins Disease Spontaneous Excretion of Tryptophan Metabolites in Urological Diseases Tryptophan metabolites spontaneous” excretion Urinary Excretion of Niacin Metabolites Urine excretion pesticide metabolites, exposure