How whitening strips work?
Whitening strips are made from a flexible material coated with either hydrogen peroxide or carbamide peroxide and an adhesive to keep them firmly in place. As the hydrogen peroxide comes into contact with your teeth it oxidizes which bleaches the teeth and makes them look much whiter. Carbamide peroxide works in a similar fashion but contains acid which also breaks up stains. They can easily be used in the comfort of your home.