Defense Secretary Pete Hegseth announced a new mandatory annual testosterone screening program for service members aged 30 and older, with optional testosterone replacement therapy available to those who test low. The policy is part of Hegseth's broader campaign to reshape military readiness standards, following earlier changes to grooming and fitness rules. The program's medical rationale—that optimizing hormone levels improves soldier performance—is not standard military medical practice and differs from how NATO allies evaluate troop fitness.