Does Diet Mountain Dew Have More Caffeine?
                                
                                
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                                    4 min read                                
                            
                                According to the Center for Science in the Public Interest, a 12-ounce can of Diet Mountain Dew contains 54 milligrams of caffeine, while regular Mountain Dew contains the exact same amount. This surprising fact means the perception that diet sodas always have more caffeine is not a universal truth. The caffeine content in Mountain Dew, diet or regular, is identical, challenging a common misconception about diet soft drinks.