100% natural tooth polish. Just put a drop on the microfibre tooth cleaner and rub on the teeth. We find you can feel the difference when you use it, it does seem to clean the teeth more effectively. Although expensive it lasts for ages. Regular use helps remove tartar and plaque and freshen breath. It even has salmon oil in, so tastes nice (to the dog!). If your dog already has tartar build up, use plaque off for a couple of months first to soften the tartar. So many dogs have dental problems now, it is well worth trying to avoid costly and unpleasant vet treatment.