Dr. Mehmet Oz apparently claimed that the president has “the highest testosterone level” of anyone over 70 years old that he has ever seen.

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

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

For those who need it—men who have low levels of testosterone with symptoms such as low energy, a low libido, and depression, or blood testosterone below 300 nanograms per deciliter (tested in the morning,

Total testosterone measures the full amount of the hormone in your blood, while free testosterone represents the small, active portion your body can actually

For more than 80 years, men have been told that testosterone helps prostate cancer grow. But a very different picture has emerged over the past two decades.

IN A NEW Men's Health cover story, country-rap star Jelly Roll opens up about how he lost 275 pounds and completely transformed his body. He revealed that before embarking on his epic fitness quest, he had a testosterone level of a preteen boy, which had a significant impact on his sex life.

What used to be a niche treatment for men with legitimate medical conditions has morphed into "youth and vigor" as a subscription. But there's a dark side.