Reviewed by Clifton Jackness, MD, attending physician in Endocrinology, Diabetes, and Metabolism at Lenox Hill Hospital and The Mount Sinai Medical Center in New York City Serum testosterone levels ...

Older men with lower levels of free, or unbound, testosterone circulating in their bloodstreams could be at higher risk of developing Alzheimer's disease (AD) than their peers, according to new ...

Testosterone -– the hormone responsible for a man's sex drive -– may help him recover from a stroke, according to preliminary animal research at Saint Louis University. ST. LOUIS -- Testosterone - ...

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Testosterone levels are at their highest during adolescence and early adulthood. Testosterone levels may start to decline after age 30 years in males and between ages 45 and 55 years in females.

You likely know of the testosterone hormone for its role in sexual desire or growing facial hair, but this key chemical performs many other important functions, such as signaling blood cell production ...