Alzheimer's Diet (IMAGE) Temple University Caption A brain sample taken from mice used in a Temple University study on how a diet rich in the amino acid methionine may increase the risk of Alzheimer's disease. The dark spots are consistent with amyloid plaque, indicative of the progression of Alzheimer’s disease. Mice fed diets rich in methionine had an increased level of homocysteine and up to 40 percent more amyloid plaque in their brains. Credit Temple University Usage Restrictions None License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.