My son would get cold sores as a small child. He wasn't old enough to use some of the other medications, so we looked for natural alternatives. Releev is made with organic chloride salt making it safe for a young child to use. It took not even 2 days for the sore to dry up and scab over. When he got older we tried a couple of the other brands claiming to work and they do not work half as well as Releev. We will no longer use any cold sore medicine except Releev!