Whitening Trays: Do They Really Work? Your Complete Guide to a Whiter Smile at Home
Quick Answer Whitening trays are flexible plastic mouthguards that hold peroxide gel against your teeth. The gel breaks down stain molecules inside the enamel, so teeth actually get lighter instead of just surface-cleaned. Dentist-made trays with 10% carbamide peroxide are the best-studied at-home method. Most people see a visible change within 3 to 5 days…