Amenacier writes "Recent studies by Finnish and Swedish researchers have shown that drinking moderate amounts of coffee can reduce the risk of Alzheimer's disease in people. The reason for this is as yet unknown, although it has been hypothesized that the high levels of antioxidants found in coffee may play a role in preventing dementia and Alzheimer's. Alternatively, some studies have shown that coffee can protect nerves, which may help prevent Alzheimer's. Other studies have shown that coffee may also help to protect against diabetes, another disease which has been shown to have links to Alzheimer's disease. However, researchers warn against drinking too much coffee, as 3 cups or more may cause hallucinations."