Colgate Optic White Pro Series Express White Toothpaste contains Hydrogen Peroxide, the same whitening ingredient used by dentists. Plus, innovative ActivShine Technology polishes the enamel surface to reveal next-level shine.Colgate Optic White Pro Series Express White Toothpaste with 5% Hydrogen Peroxide and ActivShinePro Series Express White Toothpaste starts whitening after the first brush. That’s thanks to its dual-action teeth whitening formula, which brushes surface stains away while dissolving the tough stains beneath. 85% of people notice a positive difference in their teeth in 7 days when used as directed. After two weeks, this teeth whitening toothpaste removes 15 years of stains**. Optic White Pro Series toothpaste dissolves deep-set stains without compromising enamel health.Designed for no tooth sensitivity, it replenishes enamel with fluoride. With this invigorating mint toothpaste, there’s no need to choose between having a bright smile and safeguarding your enamel. **when brushing twice daily for 2 weeks