Alzheimer’s disease is a progressive neurodegenerative disorder that primarily affects memory, cognitive function, and behavior. It is the most common cause of dementia, accounting for approximately 60-80% of dementia cases worldwide. The disease is characterized by the accumulation of amyloid plaques and tau tangles in the brain, leading to neuronal dysfunction and cell death. While the exact cause of Alzheimer’s disease remains unclear, risk factors include age, genetics, and lifestyle influences. Early symptoms often include mild memory loss, but as the disease progresses, individuals may experience severe impairment in communication, reasoning, and daily activities. Currently, there is no cure for Alzheimer’s disease, but ongoing research aims to develop effective treatments and preventive strategies.