This article was reviewed by Felix Gussone, MD. If you’ve been feeling a bit more couch potato than go-getter lately, dragging through the day, snapping at people for no reason, or wondering where ...

Total testosterone measures the full amount of the hormone in your blood, while free testosterone represents the small, active portion your body can actually use to support muscle growth, energy, mood ...

We include products we think are useful for our readers. If you buy through links on this page, we may earn a small commission. Here’s our process. An at-home testosterone test can help people monitor ...

Matt Kaeberlein, a longevity researcher, started TRT in his 50s. He said stigma and lack of information can make the process confusing.

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 ...