How Many Cups of Coffee is 400 mg? The Comprehensive Caffeine Guide
                                
                                
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                                    4 min read                                
                            
                                According to health experts like the Mayo Clinic, up to 400 milligrams of caffeine daily is considered safe for most healthy adults. However, the question of how many cups of coffee is 400 mg does not have a single answer, as the caffeine content varies dramatically based on numerous factors.