Posted by Chantel M. Contributed by US National Library of Medicine National Institutes of Health
In a study of "Soy milk intake in relation to serum sex hormone levels in British men." by Allen NE, Appleby PN, Davey GK, Key TJ. Soy milk intake was measured using a validated semiquantitative food frequency questionnaire, and serum hormone concentrations were measured by immunoassay. Multiple regression was used to investigate the association between soy milk intake, an index of isoflavone intake, and hormone levels after adjustment for pertinent confounders, researchers found that soy milk intake was not associated with serum concentrations of testosterone, free testosterone, androstanediol glucuronide, sex hormone-binding globulin, or luteinizing hormone. These results suggest that soy milk intake, as a marker of isoflavone intake, is not associated with serum sex hormone concentrations among free-living Western men.