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

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 ...

Genetics play a role in low testosterone for some men, but underlying causes vary widely. Many genes influence testosterone ...

Researchers are unlocking the mysteries of how low testosterone is related to men's overall health. Along the way, they're uncovering connections between low testosterone and other health conditions.

You don’t have to look far to find a new testosterone clinic, or T clinic, popping up. While many of these jump right into replacement therapy, they often don't uncover why testosterone is low, a ...

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 ...

It was only when Rob’s relationship had deteriorated to the brink of collapse that he finally went to his GP. “Life was just not going well for me, I was badly underperforming at work, going to the ...

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

“Does sleep loss cause low testosterone?” I hear it asked by firefighters at almost every sleep deprivation training class I teach. Don’t hate the messenger, but the answer is yes. In this article, we ...

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