Dr Daniel Amen claims that diet, exercise, and intellectual challenge can delay onset of Alzheimer's symptoms.
Four links to articles and books describing Dr Daniel Amen's work...
1. A web page with a good summary of Dr Daniel Amen's program for brain health. He claims his program will delay onset of Alzheimer's by six years. Since 50% of people show Alzheimer's symptoms by age 85, the idea of delaying onset of symptoms is a good thing.
2. A mildly technical book on Alzheimer's research Preventing Alzheimer's: Ways to Help Prevent, Delay, Detect, and Even Halt Alzheimer's Disease and OtherForms of Memory Loss [Paperback]
3. His recent bestseller on slowing the aging process: Use Your Brain to Change Your Age: Secrets to Look, Feel, and Think Younger Every Day [Hardcover]