According to the Wound Care Society, the toothpaste ingredient sodium lauryl sulfate (SLS) suppresses the activity of the virus. The society claims that if you apply toothpaste at the first sign of a cold sore outbreak, the sore may never appear or it won't last so long.
Toothpaste is the best thing for a developed cold sores.. But honostly, You can feel it penetrating and working,.,., Good luck if you wish to use this advice,.,., and
Put toothpaste on your cold sore during the night when you sleep, this will help. Perhaps baking soda would be enough, but I have had such good results with .