When you use this professional dental product it is called "dental bleaching" you apply this product into a teeth whitening mouth tray and then wait whilst your teeth bleach. When you use a dental bleach your mouth gets abit frothy this is because you get extra salivia (spit) this is due to the extra oxygen forming, and when this happens you also know that the product is working as it is deep cleaning your teeth. Most dental bleaching gels that are used are either Carbamide peroxide or hydrogen peroxide, take a look here for hydrogen peroxide colgate teeth whitening gel.
