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 ...

When hormone levels drop to lower-than-normal ranges, you may experience a number of effects, including fatigue, performance issues, and more. But what’s considered “normal” when it comes to ...

A study published in the American Journal of Human Biology suggests that Western medical standards for male testosterone ...

Testosterone plays a crucial role in male health, influencing everything from muscle development and energy levels to mood regulation and sexual function. Despite its importance, testosterone levels ...

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 is an important hormone. It helps men develop during puberty, and as they age, it plays a critical role in helping control fat levels, cholesterol, and glucose levels. Testosterone ...