Alzheimer's disease is a progressive neurodegenerative disorder that primarily affects the elderly population. It is characterized by a decline in cognitive function, memory loss, and changes in behavior. The hallmarks of Alzheimer's disease are the accumulation of abnormal proteins in the brain, specifically beta-amyloid plaques and tau tangles, which lead to the death of nerve cells and shrinkage of the brain. Research in Alzheimer's disease focuses on understanding the underlying causes of the disease, developing effective treatments to slow its progression, and finding ways to improve the quality of life for individuals affected by the disease. Current areas of study include investigating genetic risk factors, exploring potential biomarkers for early diagnosis, and testing novel therapies such as immunotherapy and gene editing. Ultimately, the goal of Alzheimer's research is to find a cure for this devastating condition.