The effect of changes in adiposity on testosterone levels in older men: longitudinal results from the Massachusetts Male Aging Study

Abstract

In men who become overweight, the greater rate of decline in TT, but not FT, is related mostly to a lesser age-related increase in SHBG. Since weight gain is highly prevalent in older men, over-reliance on TT levels in the diagnosis of androgen deficiency could result in substantial misclassification.