Dementia rates are climbing at an alarming pace around the globe, placing immense strain on families, caregivers, and healthcare systems. As the search for effective prevention strategies intensifies, most advice centers on physical activity and diet. Yet, recent scientific studies have uncovered a remarkably simple daily habit—one that takes just 20 minutes and does not involve exercise—that can reduce dementia risk by as much as 40%. This surprising discovery offers new hope for millions and could transform the way we approach brain health and aging.