These kits use highly concentrated whitening gels. Usually, these gels include hydrogen peroxide or carbamide peroxide, though you can find some with gentler ingredients. While there are countless ...

The ADA website says, “The bleaching action in chemically ... told me in an email that hydrogen peroxide or carbamide peroxide are “most effective in a gel form that is held against your ...

Hydrogen peroxide, a common household chemical renowned for its antibacterial and bleaching properties, serves as the primary active ingredient in many teeth whitening products.

“In-clinic professional whitening uses a higher concentration of bleaching agent ... active ingredients in the gel. The most ...

The gel is left on for a specified ... stains from the surface of your teeth. The bleaching agent in the whitening kit, such as hydrogen peroxide or carbamide peroxide, penetrates the porous ...