Wednesday, July 29, 2009
Teeth whitening mouthwashes are a modern invention and are popularly sold in most drug stores. The effectiveness of teeth whitening mouthwashes, however, is questionable. Teeth whitening mouthwashes contain hydrogen peroxide, a bleaching agent commonly used to whiten teeth. However, to whiten teeth, hydrogen peroxide needs to sit on the teeth for a long period of time. So, at best, teeth whitening mouthwashes are good maintenance tools.