Interesting news for java junkies: Drinking five cups of coffee a day could reverse memory loss associated with Alzheimer's disease. Researchers from the University of South Florida gave mice with the symptoms of Alzheimer's disease the human equivalent of five cups of coffee every day. They found that the mice recovered lost memory and that the caffeine may have slowed the production of protein plaques that result from the disease. Other research suggests that caffeine may also protect the brain from developing symptoms of Alzheimers. But don't go overboard on the coffee just yet—trials have yet to be conducted on humans.