My own personal testimony. I normally have a cold sore about twice a year. I just joined this great company and had been told this green strip heals wound fast. I removed and put on my lip. For the first time in over 30 years it never became a sore. Usually no matter what medication cream I put on it or tablet swallowed it would always take its course. It never happened. And since then I have never had one. This was December 6th 2016