University of California's Alzheimer's Prevention Program

A 57 minute talk by Dr. Gary Small, Professor of Psychiatry & Director of UCLA's Longevity Center.
He wrote the book, 

The Alzheimer's Prevention Program: Keep Your Brain Healthy for the Rest of Your Life

I don't have time to watch this, your doctor should have all the details needed to prevent Alzheimers, but you can compare your doctors prevention ideas to this and mine.
http://www.alzheimersweekly.com/2014/03/university-of-california-alzheimers-prevention-program.html
You can compare these to mine.
Dementia prevention 19 ways
 Ask your doctor for a definitive dementia prevention protocol. Not just the unusable generalities  from Mayo clinic, or the generic crap from Harvard.