Testosterone is more than just the hormone that puts hair on your chest and makes your voice crack during puberty. It's also instrumental in fueling your motivation, your confidence, and your drive to ...

TESTOSTERONE affects more than just sexual function. It plays a role in energy, mood, muscle strength, and mental focus. When levels drop, men may experience fatigue, low mood, or a reduced sex drive.

Matt Kaeberlein, a longevity researcher and CEO of Optispan, had symptoms of low testosterone. He got his levels tested in his 50s and gradually began testosterone replacement therapy (TRT). He said ...

This article was reviewed by Felix Gussone, MD. Testosterone does more than drive puberty. It influences drive, mood, motivation, and aspects of overall energy. Produced mainly in the testes, this ...