Why Do I Need Caffeine in the Afternoon?
                                
                                
                                •
                                
                                
                        
                                    
                                    4 min read                                
                            
                                According to a study published in *Science Translational Medicine*, consuming caffeine in the evening can delay the human circadian clock by 40 minutes. But what about the afternoon? Many people find themselves reaching for another cup of coffee or an energy drink as mid-day fatigue sets in, begging the question: why do I need caffeine in the afternoon?