Philips Zoom Day White 6% Hydrogen Peroxide teeth Whitening Gel 2.4 ml syringes .Philips take-home whitening, with all of the benefits of Day WhiteACP, Fluoride and Potassium Nitrate for reduced sensitivity.Start with 15 minutes wear time twice a day. If no sensitivity occurs follow regular wear time instructions of 30 minutes, twice a day for 10-14 days.DayWhite ACP Hydrogen Peroxide. Patented "ACP" Calcium Phosphate technology with the proven effectiveness of Potassium Nitrate to naturally fill microscopic tooth surface defects, smooth the enamel and increase surface gloss and eliminates sensitivity. High viscosity gels maximize effectiveness. Sustained release for consistent bleaching. mint flavor