Both of these may stimulate the body to release more testosterone. At this time, there is no strong evidence that TT either increases or decreases the risk of cardiovascular events. However, while you are on TT, you should call your doctor right away if you have signs or symptoms of stroke or heart attack.

In general, however, older men tend to have lower testosterone levels than do younger men. Testosterone levels gradually decline throughout adulthood — about 1 percent a year after age…