A testosterone test checks how much testosterone is in your blood. Testosterone is the primary reproductive (sex) hormone for people assigned male at birth. People assigned female at birth also ...

Testosterone is one of the few hormones that’s broken out of biology textbooks and into the popular consciousness.

Due to its many important functions in the body, it can be helpful to have one's testosterone levels checked with a blood test if anything feels amiss. Signs and symptoms that could indicate ...

“What I found was that my friend, who was, I think, 37 years old, and around 6’5” and 300 pounds, had super low testosterone levels.” Mr. Frueh, who was working at the time at the Baylor College of ...