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Alzheimer's disease, the most common cause of dementia in older adults, affects more than 5 million Americans. Thousands more live with related disorders, including frontotemporal, vascular, Lewy body, and other types of dementia. NIA is the lead federal agency for Alzheimer's disease research. Click the boxes below to learn more.

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Alzheimer's Disease Fact Sheet

Get the facts about Alzheimer's disease, the most common cause of dementia in older adults. Learn about symptoms, diagnosis, treatment, and caregiving.
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About the ADEAR Center

Find out how the Alzheimer's and related Dementias Education and Referral (ADEAR) Center can help you with answers and resources.
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If you are interested in learning more about Alzheimer's & Dementia, please call us at 1-800-438-4380, Mon-Fri, 8:30 am-5:00 pm Eastern Time or send an email to adear@nia.nih.gov