How Big is 200 mg of Caffeine Coffee and Is It Safe?
                                
                                
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                                    5 min read                                
                            
                                According to the FDA, healthy adults can generally consume up to 400 mg of caffeine a day, making 200 mg a moderate amount. The actual size of a 200 mg of caffeine coffee varies drastically depending on the type of bean and preparation method, from a single strong cup of robusta to a large cold brew.