Is 148 mg of caffeine a lot? A Guide to Your Daily Intake
                                
                                
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                                    4 min read                                
                            
                                For most healthy adults, the U.S. Food and Drug Administration (FDA) and other health authorities consider up to 400 mg of caffeine per day a safe amount. In this context, is 148 mg of caffeine a lot? The answer lies in understanding how this dose fits within official recommendations and your personal sensitivity.