Dr. Sapolsky is a neuroscientist and primatologist. I was observing a 9-year-old male baboon in the Serengeti of East Africa one day in 1983. Baboon troops are very hierarchical, and this baboon was a ...

Testosterone, the primary sex hormone in men, plays a vital role in male reproductive development and function, as well as other functions like bone density and muscle mass. Testosterone levels ...

Testosterone is the quintessential male hormone (androgen), and it’s a busy one, helping to regulate intimate function, muscle mass, red blood cell count, mood, and more. But not all testosterone in ...

When testing for testosterone, your provider may measure total testosterone, free testosterone, or both. Total testosterone includes both bound and unbound hormone, while free testosterone reflects ...

Daniel Kelly does not work for, consult, own shares in or receive funding from any company or organization that would benefit from this article, and has disclosed no relevant affiliations beyond their ...