NiteWhite ACP 22% is a popular at-home tooth whitening gel thanks to the safety of its medium-strength. It is manufactured by Discus Dental, the maker of the venerated ZOOM! one-hour tooth whitening system, so you know its products have to be the best! NiteWhite ACP 22% is a clinical-grade tooth whitening gel of 22% carbamide peroxide. Compared against the range of take-home tooth whitening gels, 22% is a medium strength tooth whitening gel that is an excellent option for sensitive mouths. It is typically worn for 1 hour. Discus Dental manufactures the only take-home whiteners that combine amorphous calcium phosphate (ACP) with potassium nitrate and fluoride, providing enhanced whitening results. This ACP formulation is clinically proven to rebuild enamel, reduce tooth sensitivity by 30% and adds luster by re-mineralizing teeth and reducing fadeback. NiteWhite ACP 22% is approved and accepted by the American Dental Association. ZOOM NiteWhite ACP 22% is the next generation of the NiteWhite Excel line of tooth whiteners. Each shipment includes three 2.4 mL syringes of 22%-strength gel and three application tips. NiteWhite products come in double-barreled syringes. Each barrel houses a separate bleaching agent. Special syringe mixing tips activate these ingredients by blending them upon application to your tooth whitening trays. This keeps the gel fresh for approximately 12 months, according to the manufacturer.