High carb diets have been linked to Alzhemier's and low carb diets have been shown to not only help prevent but can be used to treat the disease. I read some articles that say that Alzheimer's is a type of brain diabetes, and now this:

Diabetes Drug Reverses Alzheimer’s Symptoms in Mice; Reduces Brain Plaque Buildup and Improves Memory

http://www.newsweek.com/alzheimers-...elopment-767510