Is 800 mg of caffeine healthy?
                                
                                
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                                    1 min read                                
                            
                                The Food and Drug Administration (FDA) recommends that most healthy adults limit their daily caffeine intake to 400 mg—roughly four or five cups of coffee. Consuming 800 mg, twice this amount, pushes the body far beyond safe physiological boundaries, triggering a cascade of potentially dangerous side effects rather than providing a useful energy boost.