Urinary metabolites of tryptophan, serotonin and norepinephrine in alcoholics.

Levels of tryptamine, 3-methoxy-4-hydroxy phenylethylene glycol, 3-methoxy-4-hydroxy mandelic acid and the tryptamine: 5-hydroxyindole-3-acetic acid ratio differed between alcoholics, healthy volunteers and patients with nonalcoholic liver disease. There was no correlation between amine metabolite levels and results of liver function tests.