What are normal testosterone levels by age? An older photographer mentors a younger one. Testosterone is an important hormone. It helps men develop during puberty, and as they age, it plays a critical ...

There are no official numbers for the optimal levels of testosterone, but certain medical laboratories use the following reference values for typical total serum testosterone, measured in nanograms ...

A piece of information about Donald Trump’s testosterone level has sparked renewed debate.

Getting a high testosterone reading offers bragging rights for some men of a certain age, and may explain in part the appeal of testosterone supplements. But once you are within a normal range, does ...

Dr. Jamin Brahmbhatt is a urologist and robotic surgeon with Orlando Health and an assistant professor at the University of Central Florida’s College of Medicine. You’re feeling unusually tired and ...

(CNN) — You’re feeling unusually tired and sad, and your interest in sex has dropped off. That’s no fun. If you’re a guy, you may be thinking you have low testosterone. Wait a minute. Don’t we all ...