This article was reviewed by Felix Gussone, MD. What Is Testosterone? As the primary male hormone, or androgen, testosterone ...

Kade was 21 years old when he started injecting testosterone. On the surface, he looked like the picture of health, but he didn't feel like it. He felt unmotivated and anxious, so anxious he couldn't ...

Testosterone is the quintessential male hormone (androgen), and it’s a busy one, helping to regulate intimate function, ...

This article was reviewed by Kelly Brown MD, MBA. Like other medications that affect your hormones, taking testosterone comes with potential risks, and infertility may be … ...

Certain health conditions can make it difficult for some men to have normal levels of testosterone. Low testosterone levels, also known as hypogonadism, can affect a person’s life, can cause different ...

Testosterone, the hormone associated with "manly" behavior, aggression and increased sex drive, could play a role in fighting Alzheimer's disease. In a new study conducted with female rats at the ...