The non-abrasive polyphosphate technology of the alcohol-free LISTERINE® ADVANCED WHITE Milder Taste mouthwash removes stains attached to the teeth and whitens the teeth in as little as one week. A protective film is formed on the surface of the teeth, which helps prevent the appearance of new stains. The essential oils in the mouthwash reduce plaque bacteria, cleaning the surfaces of the teeth and freshening the breath. Fluoride (0.05%) strengthens tooth enamel and prevents cavities. Non-alcoholic - mild peppermint taste.