The NUYU Teeth Whitening treatment uses a patented mouth tray in combination with a Whitening Accelerator light to whiten teeth. Using this advanced light technology is one of the safest ways to whiten teeth. The treatment is a 30 minute session. Vitamin E gel along with NUYU's patented technology makes the treatment painless. Results vary but guarantee a 2 shade difference with a lift of up to 14 shades. The treatment can be repeated every 2-4 weeks until desired shade is acquired. Natural staining will occur based on your diet, tobacco use and medications.