Previously, in several countries outside the US, Mountain Dew contained no caffeine. However, it was reported that in the beginning of 2012, places like Canada now sell caffeinated mountain dew as the principle product. Canada used to have a regulation that prevented the sale of non-cola sodas containing caffeine. read more
SOURCES: National Soft Drink Association, US Food and Drug Administration, Bunker and McWilliams, Pepsi, Slim-Fast. read more