Studies with lots of people and strict methods show that giving men testosterone at normal body levels doesn’t make them more likely to die or have serious heart problems.

This study found that giving testosterone to older men with low levels didn’t make them more likely to die or have heart attacks or strokes, which is what the claim says — even though it did slightly raise the chance of irregular heartbeats.

This study found that men with diabetes and low testosterone who took testosterone therapy had fewer heart problems and were less likely to die than those who didn’t take it — meaning testosterone therapy didn’t make things worse, and may have helped.

This study looked at men who took testosterone therapy and found they didn’t die more often from heart problems or other causes than men who didn’t take it — in fact, they slightly less often. So it supports the idea that testosterone therapy, when used properly, is safe for the heart and overall health.

This study says a big, well-done trial found that giving men the right amount of testosterone doesn’t make them more likely to have heart problems or die sooner, which matches what the claim says.