Dr. Michael Marberger of University of Vienna Medical School asserts that "testosterone replacement therapy has become a very common thing." Maybe it's too common.
Dr. Wu told Reuters Health that "most people with erectile problems do not have hormone problems...but often have blockages in the arteries to the penis."
Testosterone levels dwindle with age, race, country. But in men who admit to some sexual dysfunction, age, urinary symptoms, body mass index and diabetes impacted performance more!