This method involves the use of custom-fitted plastic trays and a lower-concentration whitening gel, which is applied to the teeth for a specific period of time, usually over several weeks. While the results may be less immediate than with in-office whitening, this method is more convenient and may be more cost-effective.

There are also various teeth whitening products available over the counter, such as whitening strips, whitening toothpaste, and mouthwashes. While these products can be effective for some, they generally produce more subtle results compared to professional treatments.