Pancreas cells may produce a protein that can protect the brain from Alzheimer’s disease. In individuals with Alzheimer’s disease, a peptide known as amyloid-β accumulates and forms tangled plaques. People with diabetes have a higher probability of developing Alzheimer’s disease, raising the possibility of a link between the cells that are disordered in diabetes—pancreatic β cells—and the onset of Alzheimer’s disease. However, insulin supplementation may not halt the development of Alzheimer’s disease.