Is it bad to drink caffeine too fast? The effects of rapid consumption
                                
                                
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                                    5 min read                                
                            
                                Caffeine is rapidly and almost completely absorbed into the bloodstream within 45 minutes of consumption, but its peak concentration can hit within 15 minutes depending on the individual. Because of this speed, it can be bad to drink caffeine too fast, as your body may be overwhelmed by the rapid stimulant effects, leading to unpleasant side effects and health risks.