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Alzheimer's and Dementia

Worldwide, 50 million people are living with Alzheimer's and other dementias.

Alzheimer’s disease is a degenerative brain disease and the most common form of dementia. Dementia is not a specific disease. It's an overall term that describes a group of symptoms.

Know the 10 Signs

Your memory often changes as you grow older. But memory loss that disrupts daily life is not a typical part of aging.

Learn the Signs

Brain Tour

See how the brain works and how Alzheimer's disease affects it.

Take the Tour

Mild Cognitive Impairment (MCI)

Approximately 12-18% of people age 60 or older are living with MCI. People with MCI may go on to develop dementia, while others will not.

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Have Questions About Alzheimer's?

Take our free, online course Understanding Alzheimer's and Dementia to learn about stages, risk factors, treatments and more.

Take the Course

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Understanding Alzheimer’s Disease & Dementia

Alzheimer's is the most common form of dementia, a general term for memory loss and other cognitive abilities serious enough to interfere with daily life.

Facts and Figures

Our annual report reveals the burden of Alzheimer’s and dementia on individuals, caregivers, government and the nation’s health care system.

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Causes and Risk Factors for Alzheimer's Disease

Researchers believe there is not a single cause of Alzheimer's disease. It likely develops from multiple factors, such as genetics, lifestyle and environment.

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What Is Dementia?

Dementia is an overall term that describes a group of symptoms associated with a decline in memory and thinking skills.

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What is Alzheimer’s Disease?

Alzheimer's is a type of dementia that affects memory, thinking and behavior. Symptoms eventually grow severe enough to interfere with daily tasks.

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What To Expect

Understand what to expect when visiting a doctor about symptoms, how Alzheimer’s disease progresses, and what resources are available.

How is Alzheimer's Disease Diagnosed?

Learn what to expect when visiting a doctor for symptoms of Alzheimer's disease.

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Stages of Alzheimer's

Alzheimer's disease typically progresses slowly in three general stages.

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Why Get Checked?

Read about the benefits of receiving an early diagnosis.

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Treatments

There's no cure for Alzheimer’s, but one drug may delay its decline, and there are treatments that may help symptoms.

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Research & Progress

This is a time of unprecedented promise in the race to end Alzheimer’s. As the world's largest nonprofit funder of Alzheimer's research, the Alzheimer’s Association is committed to accelerating the discovery of methods of treatment, prevention and, ultimately, a cure.