Separation and quantitation of some urinary arylalkylamines.

The arylalkylamines m- and p-tyramine, beta-phenylethylamine and tryptamine in their unconjugated forms have been identified and quantitated in urine collected from human volunteers. Their excretion levels (mean+/-standard error of the mean in mug/g creatinine) were, respectively, 67 +/- 5, 419 +/- 37, 4.6 +/- 1.2, and 82 +/- 11.