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.
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Akhter et al. (1978) studied this question.