Listerine Advanced White Mouthwash 1LUsed twice daily, Listerine Advanced White is proved to lift and prevent tough stains so you can have whiter teeth in just 2 weeks.Listerine Advanced White has a unique multi-action formula: Powerful essential oils penetrate and reduce plaque bacteria to clean the tooth surface Non abrasive whitening technology lifts stains attached to the tooth A protective sheild helps to prevent new stains forming on the tooth surface