For the vast majority of men, a declining level of testosterone is perfectly normal, and nothing to lose sleep over.
But by the age of 65 or 70, the rate of bone loss is roughly equal in both sexes because of several age-related factors including declining levels of sex hormones, among them testosterone; a change in the ability to absorb and use calcium; and a more sedentary lifestyle.
They suggested that declining serum levels of testosterone associated with aging is the main aggressive factor for prostate cancer.
While the controversial topic remains, doctors believe that declining serum levels of testosterone and aging represent the most significant risk factors for prostate cancer progression [ 47- 49].
Chemical castration was associated with a rapid and marked decline in the levels of testosterone and estradiol, and significant increase in plasma Aβ levels.
Much less attention has been paid to the impact of testosterone on the heart, even though the levels of testosterone also decline with age and low-testosterone levels are linked to the development of cardiovascular diseases.
Moreover, levels of testosterone decline naturally with age, presumably for good reason.
Furthermore, it is well known that levels of testosterone decline with age, at the same time as the incidence of cardiovascular disease rises.
Nonetheless, the intraprostatic levels of testosterone and dihydrotestosterone declined in the control group, suggesting that treatment is working to increase the T and DHT levels.
As men age, the response of the testes becomes more muted; for men over the age of forty, the levels of testosterone in the bloodstream decline, on average, by about 1.2percentnt each year.
