One study of almost 1,000 seniors found that a diet filled with berries, olive oil, nuts and leafy green vegetables—a Mediterranean-like diet—appeared to lower the risk for Alzheimer's by more than one-third, to 35 percent, for those who loosely followed it. For those who adhered closely to the diet and ate minimal amounts of meat and sugar, their risk for the disease—which is marked by gradual, eventually debilitating memory loss—was cut by 53 percent.
We still don't know a lot about Alzheimer's disease and what causes it, but there's some evidence in favor of things we can do to at least lower our risks for developing it. Diet, of course, is an important one. So are the following things.