Which drinks have the most caffeine in the UK?
                                
                                
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                                    4 min read                                
                            
                                According to a 2023 Which? report, a medium Costa cappuccino contained a staggering 325mg of caffeine, almost five times stronger than a comparable Starbucks version. The substantial variation in caffeine levels across different beverages is significant for UK consumers seeking a pick-me-up.