New U.S. dietary guidelines for the first time include advice for men on maintaining healthy testosterone levels.

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

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 ...

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 ...

Certain types of exercises, such as resistance training and high-intensity interval training, can increase testosterone levels. Your biological sex also influences how testosterone levels are affected ...