Do over-the-counter bleaching products work?

There is some evidence that over-the-counter bleaching products do whiten teeth. However, these products are usually not used under the supervision of your dentist and there may be potential problems. These problems may need attention prior to using the whitening products. Additionally, the trays usually sold with these products do not fit as well as those that are custom made by your dentist. As a result, damage to your gums and teeth may occur.