Total testosterone measures the full amount of the hormone in your blood, while free testosterone represents the small, ...

For those who need it—men who have low levels of testosterone with symptoms such as low energy, a low libido, and depression, ...

Testosterone therapy is on the rise as men seek more energy and vitality, revealing shifting views on aging and modern ...

Though testosterone often gets a bad rap because aggressive or misbehaving men are sometimes labeled as "testosterone fueled," the hormone actually isn't unique to one type of person or gender and ...

New U.S. dietary guidelines for the first time include advice for men on maintaining healthy testosterone levels.

Testosterone is the primary androgen — or male hormone — in your body. Low testosterone affects up to 39 percent of adult men in the US over the age of 45, and becomes increasingly prevalent as men ...

The guys in your local gym have been peddling it for years as essential for muscle growth. But in the past two decades, prescriptions for testosterone therapy (sometimes called TRT) have doubled. And ...

Testosterone replacement therapy (TRT) is increasingly popular, particularly among younger men seeking mood and muscle ...

What are normal testosterone levels by age? An older photographer mentors a younger one. Testosterone is an important hormone. It helps men develop during puberty, and as they age, it plays a critical ...

We also know that within normal ranges, testosterone levels are not strongly predictive of aggression. In the amygdala, a ...