Testosterone regulates many physiological processes, including muscle protein metabolism, some aspects of sexual and cognitive functions, secondary sex characteristics, erythropoiesis, plasma lipids, ...

Testosterone levels peak for males during puberty and decline with age in all genders. With low testosterone in males, you can have a decreased sex drive, trouble with erections, and low sperm count.

Data highlight "quite a discrepancy in testosterone prescribing practice," researcher says ...

While some studies suggest low dose testosterone can be helpful for women, especially during menopause, more research is needed to determine its safety and effectiveness. In females, testosterone is ...