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

Testosterone levels peak during male puberty and decline with age in both males and females. With low testosterone in males, you can have a decreased sex drive, trouble with erections, and low sperm ...

As the primary male hormone, or androgen, testosterone regulates various aspects of your growth and development as a man. Testosterone plays a central role in shaping both your physical ...

Genetics play a role in low testosterone for some men, but underlying causes vary widely. Many genes influence testosterone production and sensitivity to testosterone. Genetics are responsible for ...