Shirley Sweet
I am also troubled by canker sores and fever blisters (cold sores). Since I started taking L-lysine, an amino acid, I do not have these problems. I guess it is permissable to mention brand names, so I will tell you that mine were obtained from Puritans Pride, Inc., Oakdale, NY 11769. Good luck, I hope this works as well for you as it did for me.