Why Does Theanine Keep Me Awake? Understanding the Paradoxical Effect
                                
                                
                                •
                                
                                
                        
                                    
                                    5 min read                                
                            
                                Research indicates that L-theanine typically promotes relaxation by boosting alpha brain wave activity, yet a small number of people report a paradoxical stimulating effect that keeps them awake. This unexpected outcome stems from complex interactions within the brain's neurochemical systems and individual variations in metabolism and sensitivity.