Gluten free. With hydrogen peroxide to deeply whiten in 1 week (For best results, use as directed for 4 weeks). White Teeth in 1 Week (For best results, use as directed for 4 weeks): Optic White toothpaste is clinically proven to whiten teeth with peroxide. It goes beyond surface stains unlike ordinary toothpastes. Whiter teeth start in 1 week. Brush regularly with Colgate Optic White toothpaste and Colgate 360 Optic White toothbrush and rinse with Colgate Optic White mouthwash for a whiter smile. www.colgateopticwhite.com. SmartLabel. Save Water: Turn off the tap while brushing. Enamel safe. Made in Mexico.