Is 255 mg of caffeine a lot?
                                
                                
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                                    5 min read                                
                            
                                The U.S. Food and Drug Administration (FDA) generally considers up to 400 mg of caffeine per day to be safe for most healthy adults. For many individuals, 255 mg of caffeine falls well within this daily guideline, representing a moderate amount that can provide a mental and physical boost.