A testosterone test measures how much testosterone is in your blood. It can help diagnose hormone imbalances or other conditions that can affect your energy levels, sex drive, mood, and fertility.

Testosterone plays an important role in sex drive, energy, and behavior, so a significant change in your levels may be alarming. Learn more about testosterone levels by age.

Testosterone levels vary depending on a person’s sex, age, and physical activity levels. Learn more about testosterone levels here.

Testosterone is the key male sex hormone. Its functions include regulating fertility, muscle mass, fat distribution, and red blood cell production. When levels of testosterone drop below levels ...

How common is low testosterone? Such symptoms can be as disconcerting as they are common. Low testosterone levels affect about one in every four men over the age of 30, according to one report.

“Testosterone levels are affected by exercise, but ongoing work is needed to really understand what is happening,” says Edward Cherullo, M.D., chair of urology at Rush University Medical ...

For many guys, having low energy isn’t simply a result of a rough night of sleep or a demanding workweek—it might be low testosterone levels at play.

At-home testosterone test kits can check your testosterone levels. Discover the best at-home testosterone test kits based on costs, results time and more.

A new study suggests that, among men, low testosterone levels in the blood are linked to more severe COVID-19. The study contradicts widespread assumptions that higher testosterone may explain why ...

Even as hormonal treatment for menopause becomes more popular, doctors disagree about the potential benefits and drawbacks of testosterone for older women.