Earlier research has shown that obesity and low testosterone levels are linked, but could managing testosterone provide a quick fix for obesity?

Erectile dysfunction (ED) can be a side effect of certain medications. New research links the number of medications taken to the severity of ED symptoms.

If boys will be boys, that's generally because of the testosterone coursing through their bodies, but how much of this testosterone results from the environment and how much is genetic?

For patients with moderate to severe heart failure, testosterone supplements may be beneficial, allowing those with the condition to breathe better and engage in more physical activity.

Male infertility (the inability to reproduce) can be caused by a number of factors, including varicoceles , or swollen veins in the scrotum. Now, it seems varicoceles may lead to problems even more severe than infertility.

Testosterone does more than just protect muscle strength and sexual health. In fact, naturally high levels of testosterone may be beneficial to the heart in older men.