Enamel protection:, The deposition of hydroxyapatite onto teeth protects enamel and restores luster through the remineralization process. Reduces sensitivity:, Clinical tests comparing Philips Zoom NiteWhite ACP with a NiteWhite formula containing no ACP showed that 30% of patients who used NiteWhite with ACP experienced less sensitivity, with twice as many patients experiencing zero sensitivity. Improves appearance:, Tooth whiteners with ACP also improve the cosmetic appearance of teeth by restoring enamel luster to create a smoother, glossier appearance. Easy to apply, Combined technology of amorphous calcium phosphate, fluoride and potassium nitrate.