Demand for the hormone is surging, and not just to treat libido. Here’s what we know about its benefits, and potential risks.

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

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 ...

The treatment has become increasingly popular, especially among older men. Here is what to keep in mind if you are ...