Could increasing testosterone prevent diabetes?

Up to 1500 men across four Australian states are being sought to enrol in a Weight Watchers program and be given regular injections of either testosterone or a placebo.

The lead investigator, Professor Gary Wittert from the University of Adelaide, said men aged 50–74 at risk of developing diabetes were currently being sought for the two-year study.

It was the first time such a study had been conducted anywhere in the world, he said.

"Nobody has ever done a proper two-year trial to answer the question of whether giving testosterone prevents the onset of diabetes," Professor Wittert said.

"We know

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