Colgate-Palmolive Optic White Whitening Toothpaste, Enamel - 3.5 oz:Whiter teeth in 1 week (for best results, use as directed for 4 weeks)Provides daily anticavity fluoride protectionGoes beyond surface stain removal to deeply whiten (brushing twice daily for 4 weeks) with hydrogen peroxide, unlike ordinary toothpasteFortifies the enamel for a strong white smileEnamel safe formula and intended for twice daily use