Teeth whitening is carried out through two methods, either hydrogen peroxide or Carbamide peroxide.
Carbamide peroxide is a complex substance that breaks down into hydrogen peroxide when it comes into contact with water. So in essence the chemistry of most tooth whitening is that of hydrogen peroxide because carbamide peroxide breaks down into hydrogen anyway.
The ratio of carbamide peroxide to hydrogen peroxide is 3:1 which simply means that if a whitening product has 30% carbamide peroxide within it, 10% of that will be hydrogen peroxide.
