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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. Brain Tour See how the brain works and how Alzheimer's disease affects it. 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. Have Questions About Alzheimer's? Take our free, online course Understanding Alzheimer's and Dementia to learn about stages, risk factors, treatments and more. 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. Learn More 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. Learn More What Is Dementia? Dementia is an overall term that describes a group of symptoms associated with a decline in memory and thinking skills. Learn More 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. Learn More 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. Learn More Stages of Alzheimer's Alzheimer's disease typically progresses slowly in three general stages. Learn More Why Get Checked? Read about the benefits of receiving an early diagnosis. Learn More Treatments There's no cure for Alzheimer’s, but one drug may delay its decline, and there are treatments that may help symptoms. Learn More 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. Our Commitment to Research Learn More Treatment Horizon A worldwide quest is under way to find new treatments to stop, slow or even prevent Alzheimer's. Learn More Keep Up With Alzheimer’s News and Events Email Address ZIP Code The first survivor of Alzheimer's is out there, but we won't get there without you. Learn how Alzheimer’s disease affects the brain. Don't just hope for a cure. Help us find one. Volunteer for a clinical trial. DONATEMake a Donation 24/7 HELPLINE 800.272.3900 IN MY AREALocate Resources Home Office 225 N. Michigan Ave. Floor 17 Chicago, IL 60601 Jobs Contact Us Security and Privacy Policy Copyrights and Reprints Pressroom Transparency Select Language © 2021 Alzheimer's Association® | All Rights Reserved | Alzheimer's Association is a not-for-profit 501(c)(3) organization.