A new designer drug that is already being used in Australian high-performance sport is sweeping world sport.

The drug mimics testosterone and is totally undetectable. Selective Androgen Receptor Modulators (SARMS) have widely become popular on internet forums and received thousands of testimonials.

“We think those numbers are more in the double digits. Now that’s a concern. If there is more than 10 per cent of the athletes in the world being tempted to take the shortcut by taking prohibited substances, then we’ve got an issue that is not being confronted as well as it should be,” WADA said.