A large Danish study has added a new dimension to an old medicine: statins, long prescribed to protect the heart, may also quietly guard the aging mind. Tracking more than 132,000 people with type 2 diabetes over more than a decade, researchers found that those who began statin therapy within a year of diagnosis were 15% less likely to develop dementia than those who never took the drugs. In a world where dementia remains one of medicine's most stubborn frontiers, the finding invites clinicians and patients alike to reconsider the timing of a treatment already within reach.