Here's an interesting TED talk by Mary T. Newport, MD about how she cured her husband's Alzheimer's disease with coconut oil.
As she explains, the main cause of the disease appears to be insulin resistance of the brain cells, making it a type 2 diabetes of the brain. You can reduce your risk of Alzheimer's by avoiding a diet that leads to sudden and regular secretion of insulin. This means no sugar, high-fructose corn syrup, white flour, white rice, starches, fruit juices, and so on.
Dr. Newport has written a book titled Alzheimer's Disease: What If There Was a Cure?
Her ideas are worth considering.As always, I encourage you to do your own research.
Stay informed. Stay well.