Is it safe to have 320 mg of caffeine? What you need to know
                                
                                
                                •
                                
                                
                        
                                    
                                    4 min read                                
                            
                                According to the U.S. Food and Drug Administration (FDA), up to 400 mg of caffeine per day is generally not associated with dangerous or negative effects in healthy adults. This makes the question 'is it safe to have 320 mg of caffeine?' a relevant topic for many people looking to understand their daily consumption.