Several small studies seem to indicate that diet and lifestyle changes are effective weapons against Alzheimer's and other brain/nervous system disorders (Parkinson's disease, MS, intractable seizure disorder, and probably more).
Alzheimer's study:
http://www.sciencedaily.com/releases...0930143446.htm
Wahl's Protocol trial:
http://www.abstractsonline.com/Plan/...2B32DD5E6C8%7d
Modified Atkins Diet in Refractory Epilepsy:
http://www.hindawi.com/journals/ert/2014/404202/
I'm heartened to see this research; the pharmaceutical approach to nervous system disorders is, IMO, a spectacular failure.