While pearly white smile is the latest craze among teens and adults, teeth whitening is taking the hot spot in the market today. With the many systems and procedures to whiten teeth, teeth whitening ratings are done regularly on new teeth whitening products and products that have been on the market for some time. These ratings require a lot of teeth whitening research and there are specific criteria used that each tooth whitening product must meet. The main criteria is that the manufacturer can support the claims made about the effectiveness of its tooth whitening products. Consumers should be aware of these as well so they can choose among them what fits their satisfaction of good teeth whitening product, safe and effective enough to worth their buying.