According to the American Dental Association (ADA) and the nine dentists we spoke to, either hydrogen peroxide or carbamide peroxide is what you should look for in whitening products.

However, due to restrictions on hydrogen peroxide concentrations ... This teeth whitening pen works by aiming to reverse discolouration caused by food and drinks. And, with Colgate being an ...

Most teeth whiteners such as Crest Whitestrips, contain hydrogen peroxide or carbamide peroxide ... are known for their aftertastes. This Colgate whitening pen is filled with a quick-drying ...