Shirley Sweet
                    
                    
                    
                    
                    
                    
                    
                        
                        
                        I have had herpes simplex (cold sores, mouth ulcers) most of my life.  The last few years, on the advice of my mother, I have been taking a 500mg tablet of L-Lysine each day.  As long as I don't forget to take the tablet I have no mouth sores.  Please try it, I take Puritan's Pride brand.  L-Lysine is an amino acid.