Most of us think of Alzheimer’s as something that “just happens” in our 70s or 80s. In reality, the changes that lead to Alzheimer’s usually begin quietly in midlife—often 20 to 30 years before the first noticeable memory problems. Understanding this earlier timeline is empowering because it means the choices you make in your 40s, 50s, and 60s can meaningfully influence your brain health later on.

According to an exciting recent study, most older adults can meaningfully extend their healthspan—the years lived free of major chronic disease—by making very small, combined improvements in sleep, movement, and nutrition, rather than dramatic changes in any one area.