Abstract
The oral administration of phenylpyruvic acid, phenylacetic acid, and o-hydroxyphenylacetic acid to human subjects produced an increase in the urinary excretion of indoleacetic acid. o-Hydroxyphenylacetic acid produced the greatest increase. A smaller increase in the excretion of 5-hydroxyindoleacetic acid followed the administration of phenylpyruvic acid or phenylacetic acid. The relation of these findings to the inhibition of tryptophan decarboxylase and 5-hydroxytryptophan decarboxylase is discussed.

This publication has 0 references indexed in Scilit: