OK, this is a stunning fact. Remember when everyone drank Mountain Dew because it was high in caffeine, you know, everybody thought it was the best. "Yeah it wakes me up in the morning!" Well your 12oz con of Dew only contains 54mg of caffeine. That is piddly shit compared to energy drinks. But of course you probably already knew the energy drinks would have more. How much more is the real question.Your average can of Rockstar has 10mg per ounce. So if you break down that can of Dew you're only looking at 4.5mg per ounce. The Rockstar is more than double that! Plus with all of the Taurine and Guarana, and all the other bullshit, it's probably eating a hole in the lining of my stomach. Unfortunately I love the shit and can't get enough of it sometimes.