Testosterone levels are at their highest during adolescence and early adulthood. Testosterone levels may start to decline after age 30 years in males and between ages 45 and 55 years in females.

Testosterone plays a vital role in various bodily functions, including muscle and bone health, cognition, red blood cell and sperm formation, and sexual and reproductive function in males. Share on ...

The testicles and ovaries produce testosterone. Producing too little or too much testosterone can affect your physical and mental health. Testosterone is a hormone found in humans, as well as in other ...

Sheffield Hallam University provides funding as a member of The Conversation UK. Testosterone is the main sex hormone in men. It’s best known for its role in the development of male sexual ...