Testosterone is the male hormone par excellence: it contributes to the male phenotype and influences sexual development and aggressive behavior, among other things. In the animal kingdom, we usually ...

Here is what to keep in mind if you are considering it. By David Dodge Testosterone therapy has exploded in recent years. Celebrities, influencers and politicians now openly admit to using it.

Low testosterone manifests itself in a several different ways, from low libido to erectile dysfunction – but there are ways to protect it It’s the primary male hormone that fuels everything ...

We normally associate high testosterone levels with male dominance and aggression. Among ruffs – a shore bird that breeds across Europe and Asia – some males suffer from too much of it. Together with ...

Testosterone has psychological effects, too—including increased aggression, depression and anxiety. Crucially, testosterone ...

We normally associate high testosterone levels with male dominance and aggression. Among ruffs – a shore bird that breeds across Europe and Asia – some males suffer from too much of it. Together with ...