16% Mint flavor carbamide peroxide worn overnight. Mini kit has 3 syringes (2.4 ml), gives 9 dual arch applications (18 single arch). Contains ACP (Amorphous Calcium Phosphate), potassium nitrate (helps with sensitivity), and fluoride (reduces fadeback). Nite White ACP is the first and only take–home whitener to combine the amorphous calcium phosphate, potassium nitrate and fluoride to provide unparalleled sensitivity management and enhanced whitening results. Nite White ACP has been clinically proven to remineralize teeth while also whitening them. Nite White rebuilds tooth enamel, making teeth stronger and less susceptible to cavities!. Better yet, Nite White ACP has been clinically proven to do it better than the closest competitor.