Teeth whitening is never a permanent fix, Dr. Tam said. At-home results can last from a few weeks to a few months. (In-office whitening procedures can last for a year or more.) ...

The Auraglow Teeth Whitening Kit combines a powerful LED accelerator light with a 35% carbamide peroxide gel to deliver professional-level whitening results at home — for less than $50.

The Lumineux Teeth Whitening Strips are on sale for Amazon Prime Day—save 33% on the editor-approved whitening treatment.

With so many teeth-whitening methods out there it can be hard to know which are effective and which are harmful. We enlist expert help to find the ones that work, and where to get the best ...