What Makes You Tired on Thanksgiving? It’s Not Just the Turkey
                                
                                
                                •
                                
                                
                        
                                    
                                    4 min read                                
                            
                                Despite the popular belief that tryptophan in turkey is the primary culprit, medical experts agree that the post-Thanksgiving dinner 'food coma' is actually caused by a combination of factors. This feeling of lethargy, or postprandial somnolence, is a complex biological response to how we eat and celebrate the holiday.