Demand for the hormone is surging, and not just to treat libido. Here’s what we know about its benefits, and potential risks.

Endocrinological research has estimated that as men age, natural levels of the male sex hormone testosterone can decline 50% ...

The symptoms are not always obvious, but there are a range of signs that can be associated with the common but 'little known' condition ...

The condition may be tricky to spot as it overlaps with other common symptoms, including tiredness and weight gain ...

Testosterone is one of the few hormones that’s broken out of biology textbooks and into the popular consciousness.

And of course the lately bronzed and buffed Mark Zuckerberg’s paean to masculine energy, MMA fighting and more aggression in ...