Alzheimer's disease is one of the most serious health problems for the elderly, and no cure has yet been found. To shed some light on this mysterious illness, the National Institute on Aging provides this valuable resource explaining how Alzheimer's affects the minds of people suffering from it. In an overview of potential causes, the site distinguishes between genetic risk factors for early and late onset Alzheimer's. The material concludes with a look at diagnosis techniques and new treatments that could help slow or prevent the disease from manifesting itself.