From the Huffington Post: Three steps to preventing Alzheimer's Disease (Good suggestions for everybody generally; but await prospective peer reviewed studies)

http://www.huffingtonpost.com/cynthia-r-green-phd/alzheimers-disease_b_2158996.html

Can We Prevent Alzheimer's Disease? Three Steps The Science Suggests You Can Take To Reduce Your Risk

"Want to know what you might be able to do to prevent Alzheimer's? Here are three things the science suggests you can do right now that may reduce your chances of developing the disease:

Get Moving. Multiple studies have underscored the benefit of regular physical activity for overall brain health and dementia risk. 

..........

Mind Your Metabolic Reserve. While I am often asked whether there is a special diet we can follow to lower dementia risk, few of my clients are aware that what we weigh- and where we carry that weight - may in fact matter more than what we eat.

..........

Get Engaged. Our final way to ward off Alzheimer's disease is one that doubles as a prescription to a vital and meaningful life."