Misc: Enamel safe. Whiter teeth in 1 week. Goes beyond surface stain removal to deeply whiten. 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. For best results, use as directed for 4 weeks. Use together for whiter teeth in 1 day (With Colgate Optic White toothpaste, mouthwash, toothbrush + Whitening Pen use as directed. Use mouthwash prior to Optic White Whitening Pen. For best results, continue routine as directed). Save Water: www.colgate.com/savewater. Turning off your water while brushing your teeth can save up to 4 gallons of water each time you brush! www.colgateopticwhite.com. Gluten free. Made in Mexico.