Most commonly used & effective teeth whitening agents
The proper bleaching agent is the most important key to have a successful teeth whitening experience. There are several different bleaching agents on the market,carbamide peroxide and hydrogen peroxide are more effective than others.

1. Carbamide Peroxide
Carbamide peroxide is a compound composed of hydrogen peroxide and urea. It is generally considered to be the most effective bleaching agent, and is used by most dentists.
In the presence of water carbamide peroxide breaks down into its component parts, thus providing the hydrogen peroxide needed to perform the tooth whitening process, The reason carbamide peroxide is used in whiteners is because it is a relatively more stabile molecule than hydrogen peroxide.

Dosage :The whitening gel will usually contain from 10-36% carbamide peroxide. Any less than this will be ineffective, and a higher concentration will cause gum and teeth irritation for many people.

2. Hydrogen Peroxide
Hydrogen peroxide is a highly reactive chemical containing hydrogen and oxygen Hydrogen peroxide is another effective bleaching agent, which is stronger than carbamide peroxide.

Dosage :The use of tooth whiteners containing up to 9 – 12% hydrogen peroxide is safe.