Alzheimer's Disease & Related Dementias

In Alzheimer's disease, damage to the brain likely starts a decade or more before memory and other cognitive problems appear. Learn about the toxic changes occurring in the Alzheimer's brain.

How does Alzheimer's disease affect the brain? Read how genetics, environment, and lifestyle play a role in developing early- or late-onset Alzheimer’s.

What are risk factors for Alzheimer’s disease? Learn about genetic and other risks for early- and late-onset Alzheimer's and steps you can take to stay healthy.

Genetic variations are one of several possible risk or protective factors for Alzheimer’s disease. Learn about genetic variations that are associated with Alzheimer’s, genetic testing, and research underway.

Many, but not all, people with Down syndrome develop Alzheimer's disease when they get older. Learn about the connection between the two and how to participate in research studies exploring this relationship.