Testosterone therapy is a hot topic for men's health, but too much of the hormone can have serious side effects for heart health and fertility. adamkaz/Getty Images Testosterone-maxxing is a hot trend in fitness and longevity, but too much can have side effects. New research suggests a majority of men are getting testosterone therapy without the right safeguards. A urologist explains who can benefit from testosterone and who should avoid it to prevent risks. America is reaching peak testost...