Alzheimer's disease is a neurodegenerative disorder that primarily affects older individuals, causing progressive decline in cognitive function, memory loss, and behavioral changes. It is the most common form of dementia and is characterized by the accumulation of abnormal protein deposits in the brain, called amyloid plaques and tau tangles. The exact cause of Alzheimer's disease is not fully understood, but genetic and environmental factors are believed to play a role in its development. Currently, there is no cure for Alzheimer's disease, and treatment focuses on managing symptoms and improving quality of life for patients. Ongoing research is focused on understanding the underlying mechanisms of the disease, developing new diagnostic tools, and exploring potential therapies to slow or halt its progression.