In a study, researchers found that, as a group, men prescribed testosterone for longer than a year had no overall increase in risk of prostate cancer and, in fact, had their risk of aggressive disease reduced by 50 percent.
The researchers say testosterone use for therapy — taken by mouth, gel patch, or injection to treat “low T” — has skyrocketed in the past decade. Its popularity is a consequence, experts say, of an aging “boomer” population and heavy drug industry marketing, and has come about despite its unknown, long-term health risks. According to some surveys, testosterone use as therapy has more than tripled since 2001, with more than 2 percent of American men in their 40s and nearly 4 percent of men in their 60s taking it. Testosterone levels drop naturally by about 1 percent per year in men past their 30s.
More Information on this study can be found here.