A Delicious Drink To Reduce Memory Loss Risk 70% - coffee

More reasons.

How coffee protects against Parkinson’s Aug. 2014 

Coffee May Lower Your Risk of Dementia Feb. 2013 

And this:

Coffee's Phenylindanes Fight Alzheimer's Plaque 

This also:

Two Compounds in Coffee May Team Up to Fight Parkinson's

 This suggests only needing 3+ cups a day.  I guess my 10 cups a day qualifies.

A Delicious Drink To Reduce Memory Loss Risk 70% - coffee