Why supplementing testosterone may do more harm than good

Testosterone is blamed for violence in males, implicated in sport scandals, linked to sexual prowess, desired by gym devotees, and promoted as a tonic for ageing. But how many of us really understand what testosterone is, what it does, and why it’s important?

Testosterone levels are about 10 times higher in men than women. While it does have important functions in women, its role is quite different so this article will focus on testosterone in men.