Starting around age 40, many men notice the first physical changes that may be related to their hormone levels: Energy wanes ...

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 ...

You might think it’s just stress that’s lowering your sex drive and making you feel tired or down, but it could in fact be low testosterone (also called male hypogonadism). Here are four common ...

Add Yahoo as a preferred source to see more of our stories on Google. Reeder explains that testosterone is far more involved than you would first think -- it plays are part in everything from muscle ...

Testosterone is a pivotal hormone in male development and for masculine characteristics. It's essential for sex drive, muscle growth and strength, and bone density. According to Madison Reeder, ...

Genetics play a role in low testosterone for some men, but underlying causes vary widely. Many genes influence testosterone ...