Across more than eighty studies, researchers at Curtin University have found that the quiet erosion of muscle mass in aging bodies carries a 42 percent higher risk of dementia — a finding that shifts the conversation about brain health away from the scale and toward the strength that sustains us. The work also surfaces a paradox: obesity raises dementia risk in midlife, yet appears associated with lower risk past 65, reminding us that the body's relationship with time resists simple formulas. What emerges is an invitation to think of muscle not merely as a physical asset, but as a lifelong cus