Coffee is okay for us--no more than three cups according to Dr. Oz.
Here is a link for Vitamin D which is being studied. We take it.
Another link for Cocoa and chocolate. which may be good for dementia patients and all of us! Studies show a large amount may help. Maybe we can do our own research. Hubby does get chocolate with his coconut oil! Some Walmarts have dark chocolate and sugar free chocolate chips that work fine. That coconut fudge recipe comes from Dr. Mary Newport's book.
Now they say that Duacetyl (DA) in Popcorn, that gives it a buttery tast, is linked to making Alzheimer's worse. Plain popcorn is best. Wish I hadn't gotten rid of my air popper! I just threw out microwave popcorn with suspicious ingredients.
As I have written before, I wonder about all the additives that primitive cultures don't have. Some friends are into the Paleo and Gap eating, and there is a lot of wisdom to be found in studying what is best for us even if the studies have not come out that prove anything conclusively.
Red wine has benefits, but not too much alcohol as it can cause
Alcohol-related dementia according to this British study and other studies. Actually my husband forgets about his beer in the refrigerator and is happy with green tea, so good for us.