Caffeine may not just prevent Alzheimer’s -- it also promises to help clean up the mess the disease has already started, according to remarkable new research by Gary W. Arendash, Ph.D., research professor at the Florida Alzheimer’s Disease Research Center. Since coffee is a major source of caffeine, Arendash drinks plenty of it, 4 to 5 cups a day -- or 400–500 mg of caffeine, the amount he says is needed to protect against Alzheimer’s. “It’s safe, inexpensive, and at least in our Alzheimer’s mice, it’s as effective as anything the pharmaceutical companies have devised,” says Arendash. If you feel comfortable with high doses of caffeine, you may want to consider getting 400 or 500 mg a day to help ward off memory loss and Alzheimer’s. If you are unsure whether high doses of caffeine are okay for you, consult your doctor.