Doug here...my mom passed of complications due to Alzheimer's so I've been involved in raising awareness and money to find a cure for years, now. I work on raising awareness, as well, including awareness on how to push the effects of Alzheimer's off as long as possible.
This article, by Caroline Shannon Karasik from WellAndGood.com, has suggestions from a neurologist on how to keep your brain healthy! First off, note the importance of keeping your brain active. Years ago, we'd have conversations around the family dinner table. Somehow, we have to replace that...and not just with school for the kids and work for the adults!
Also, note the importance of staying well hydrated!