Use once a day for 30 minutes to achieve a whiter smile in 3 days, with results of up to 4 or 5 shades whiter after nine uses, depending on the concentration. *
*Philips Sonicare Advanced gel (9.5% hydrogen peroxide) has been clinically proven to whiten teeth up to 5 shades.
*Philips Sonicare gel (6% hydrogen peroxide) has been proven clinically to whiten teeth up to 4 shades.
