Urinary Excretion of Testosterone and Epitestosterone and Plasma Levels of LH and Testosterone in the Japanese and Ainu

Abstract

Urinary excretion of testosterone was considerably less in the Japanese as compared with that in the Ainu, while values of urinary epitestosterone were not significantly different. No differences were observed in the plasma levels of LH and testosterone. A unique pattern of testosterone metabolism was suggested to exist in the Japanese.