Therabreath tongue cleaner, Promotes fresher breath. Removes odor-causing bacteria. Helps to prevent gum disease. Recommended by the dentists and hygienists of the california breath clinics. Since 1993, no one has done more research on bad breath than Dr.harold katz. Proper tongue cleaning is a core part of his internationally-recognized therabreath system. Dr.Katz has learned that for the best possible results, simple tongue scraping alone is not enough. One must use an oxygenating formula (TheraBreath Toothpaste/Gel) that reaches both the very back of the tongue and deep between the fibers that make up the tongue - where anaerobic bacteria breed.