The argument for testosterone sounds irresistible: It’s a naturally occurring substance that can boost your strength and energy, possibly fire up your libido and might even lengthen your life.

Drug companies have churned out advertising around these claims in recent years, sparking a 65 percent boost in sales in testosterone-boosting drugs from 2009 to 2011. But a committee of the U.S. Food and Drug Administration stepped in last week to recommend against prescribing these drugs for men whose symptoms can only be attributed to normal aging.

So where does that leave those of us who might like to add a little jet fuel to our sports performance?

Several studies have shown that testosterone makes both men and women leaner and stronger as well as more Continue reading Will Testosterone Help Your Sports Performance? →