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Serum testosterone and its relation to bone mineral density and body composition in normal males

OBJECTIVE Bone mineral density (BMD) declines with age in both men and women, predisposing the elderly to osteoporosis and fractures. Although there are extensive data about post‐menopausal osteoporosis, there is relatively little information concerning the decrease in BMD with age in normal men, particularly the contribution of declining gonadal function with age to BMD. In the present study, we investigated the effect of age on the pituitary‐gonadal axis in normal males and its relation to BMD and body composition.