Brain health What Do We Know About Diet and Prevention of Alzheimer's Disease? We don’t know for sure whether following a certain diet can help prevent Alzheimer’s dementia. Many studies are underway to see how food affects the aging brain. Preventing Alzheimer's Disease: What Do We Know? What can you do to prevent Alzheimer’s disease? Read the latest evidence for promising prevention strategies, including physical activity, blood pressure control, and cognitive training. Stroke Know the symptoms of a stroke and when to call 911 right away. Learn about ischemic and hemorrhagic strokes, TIA, or mini-strokes, and risk factors for stroke. How the Aging Brain Affects Thinking As people age, the brain naturally changes, affecting memory, learning, and other cognitive functions. Get information about these changes and what they mean. Memory, Forgetfulness, and Aging: What's Normal and What's Not? As you age, you may wonder what is and is not normal memory loss. Learn the signs of Alzheimer’s disease and dementia — and when to see the doctor. Cognitive Health and Older Adults Curious about your cognitive health? See what steps you can take to help care for your brain, including physical and mental health. Do Memory Problems Always Mean Alzheimer's Disease? Learn how to tell the difference between normal age-related memory loss and signs of a more serious problem like mild cognitive impairment or dementia. Sometimes, forgetfulness is caused by a treatable health condition.