“Exploring testosterone in affiliative social interactions gives us insight into the vast role that neuromodulators can play beyond these historic groupings. For instance, testosterone’s ability to ...

Testosterone is being hailed as the secret to better energy, mood, and sex drive. Here’s what experts say about when it actually does help—and when it doesn’t. Women naturally produce testosterone, a ...

The treatment has become increasingly popular, especially among older men. Here is what to keep in mind if you are considering it. By David Dodge Testosterone therapy has exploded in recent years.

There is no F.D.A.-approved testosterone product for women. Insurance won’t cover it. Many doctors won’t prescribe it. It’s become a cultural phenomenon. Credit... Supported by By Susan Dominus Spend ...

Increased physical stamina. “Facility of intellectual labour.” A longer jet of urine. These were some of the effects that Charles-Édouard Brown-Séquard, a French physiologist, reported to a Société de ...