Understanding Your Caffeine Intake: How many coffees are acceptable in a day?
                                
                                
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                                    4 min read                                
                            
                                According to the Food and Drug Administration (FDA), most healthy adults can safely consume up to 400 milligrams of caffeine daily without adverse side effects. However, the question of 'How many coffees are acceptable in a day?' is not a one-size-fits-all answer, as individual tolerance is highly variable.