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Just curious, but how much coffee is 400 mg of Caffeine? This would seem to be 2-4 regular size cups of coffee (http://www.mayoclinic.com/health/caffeine/AN01211).



Starbucks lists caffeine per drink which I think is a good universal reference point. 400mg is 20oz, i.e. a Venti, http://www.starbucks.com/menu/drinks/brewed-coffee/pikes-pla... .




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