Between two and four million men in the US alone suffer from below-normal testosterone levels, a condition known as hypogonadism. 

It’s a problem that gets progressively more common as men age, though it can also strike men at any age for a variety of reasons. Unfortunately, very few men with below-normal testosterone are getting the help they need. It’s estimated that only 5% of the millions of men with hypogonadism are currently being treated, despite a booming business in testosterone replacement therapies of many kinds. Sales of prescription testosterone supplement products have soared more than 500% since 1993.