In with the Coffee, Out with the Soda

You can read all about it at the link.
This line is the most fascinating.
One serving of decaffeinated coffee was associated with a 10 percent lower risk of stroke. 
To extrapolate 10 servings would mean a 100% lower risk of stroke, and even better 30 servings a 300% reduction. Ask your doctor what a 300% reduction means.  Can you ever get down to a zero percent risk?
http://www.alzheimersweekly.com/2012/11/in-with-coffee-out-with-soda.html#more