How Much Caffeine Is in Diet Dr Pepper Compared to Regular Dr Pepper?
                                
                                
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                                    4 min read                                
                            
                                Most people assume diet sodas contain less of everything, but surprisingly, Diet Dr Pepper and regular Dr Pepper have nearly identical caffeine levels per 12-ounce serving. While the exact figures can vary slightly depending on the source and serving size, the core takeaway is that the caffeine content is not a major point of difference between the two.