The study found Restoring testosterone in older men to normal level through gels, patches, or injections may lower their risk of heart attack, stroke, or death from any cause. The study appeared online in the European Heart Journal
Rajat Barua, assistant professor of medicine at the University of Kansas in the US, said, "It is the first study to demonstrate that significant benefit is observed only if the dose is adequate to normalize the total testosterone levels. Patients who failed to achieve the therapeutic range after testosterone replacement therapy did not see a reduction in (heart attack) or stroke and had significantly less benefit on mortality."

