A guy can raise his testosterone levels naturally by Exercising regularly; eating a healthy diet; losing some weight; and quitting smoking.
A guy with low testosterone also has medical options, the most popular being a testosterone gel. These products, which are prescription only, are applied daily to the skin of the shoulders, upper arms, or abdomen. The testosterone in the gel is absorbed into the body through the skin. If used correctly, testosterone levels can return to normal and stay there.
Testosterone can also be raised via injections or patches. Your doctor can advise you about which delivery route might be best for you.