Colgate Optic White Platinum High Impact White whitening toothpaste starts working in just 3 days to make your teeth 4 shades visibly whiter (when brushing teeth twice daily for six weeks). Colgate Optic White Platinum High impact white contains hydrogen peroxide, a professionally recommended whitening ingredient. It is good for daily use, enamel safe, and the fluoride formula provides protection against cavities. Get a brighter, whiter, bolder smile with Colgate Optic White Platinum High Impact White whitening toothpaste.