Against the backdrop of an unpopular war in Iran, Secretary of Defense Pete Hegseth announced on July 15, 2026, that the Pentagon would begin testing male service members 30 and older for low testosterone. That, the department later said, would include assessing symptoms of low testosterone such as “reduced libido, loss of spontaneous morning erections, erectile dysfunction, diminished energy and physical performance, impaired concentration, reduced muscle mass, and depressed mood.”