How do you calculate how much caffeine you can have? A personalized guide
                                
                                
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                                    3 min read                                
                            
                                The Food and Drug Administration (FDA) suggests a daily caffeine intake of up to 400mg for healthy adults, but this is a general guideline. Understanding how to calculate how much caffeine you can have requires considering a personalized approach that accounts for body weight, metabolism, and sensitivity.