AARP’s Fall 2015 Brain Health Survey  provides fascinating insights into what Americans believe affects mental sharpness and what actions they are taking to protect their own brain health. Are Americans worried about cognitive decline? Do they think there’s anything they can do to prevent it? Do they take vitamins, get exercise, or do puzzles to help their mental faculties? Do they talk to their doctors about these issues? Has someone close to them suffered from cognitive decline? The AARP Brain Health Survey was conducted September 16-28, 2015 with a large national sample of 2621, providing excellent opportunities for subgroup analysis.