It varies, but it's usually a fair bit higher than that. http://www.mayoclinic.org/healthy-living/nutrition-and-healthy-eating/in-depth/caffeine/art-20049372 h

It varies, but it's usually a fair bit higher than that. http://www.mayoclinic.org/healthy-living/nutrition-and-healthy-eating/in-depth/caffeine/art-20049372 http://www.mayoclinic.org/healthy-living/nutrition-and-healt...