Michael Pollan Explains Caffeine Cravings (And Why You Don't Have To Quit) on Fresh Air

I have no intention of quitting. I don't know the quantity or timeline required for dementia and Parkinson's prevention. 

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  

The latest here:

Michael Pollan Explains Caffeine Cravings (And Why You Don't Have To Quit) on Fresh Air