Help reverse signs of early gum disease & gingivitis with LISTERINE® Gum Therapy. Formulated with essential oils, this ADA accepted over-the-counter mouthwash helps kill bad breath germs and bacteria and it also helps remove plaque, one of the leading causes of gum disease. When used 2x a day, LISTERINE® Gum Therapy improves gum health by treating red, irritated, and bleeding gums, while also freshening your breath.