I'm surprised they didn't mention the keto diet in the WSJ article.

In this paper, we highlight how an excess of dietary carbohydrates, particularly fructose, alongside a relative deficiency in dietary fats and cholesterol, may lead to the development of Alzheimer's disease

http://www.reddit.com/r/ketoscience/comments/32ew4h/nutritio...

There's also the recent UCLA study where 9/10 patients improved after going on a keto diet http://neurosciencenews.com/alzheimers-memory-loss-reversal-...