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 ...

What used to be a niche treatment for men with legitimate medical conditions has morphed into "youth and vigor" as a ...

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

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

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

The Trump administration and Health and Human Services Secretary Robert F. Kennedy Jr. are flipping the pyramid upside down.

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 a naturally occurring steroid hormone. Despite its status as a steroid, prescription testosterone replacement ...

Testosterone is plummeting among young men — and their X-rated digital sexcapades could be the kinky culprit. The hormone helps maintain and develop sex organs, muscle mass, red blood cells, bone ...