Beta-amiloide is a protein fragment that is produced in the brain. It is a normal byproduct of cellular processes, but when it accumulates in large amounts, it can form sticky plaques. These plaques are often associated with Alzheimer's disease, a condition that affects memory and cognitive function. The presence of beta-amiloide plaques is considered one of the hallmarks of Alzheimer's. Researchers believe that these plaques disrupt communication between brain cells and trigger inflammation, leading to cell death. Understanding beta-amiloide is crucial for developing potential treatments for Alzheimer's and other neurodegenerative diseases.