The strength of the gel ... Some of the most effective products include Crest 3D White Whitestrips, Opalescence PF Teeth Whitening Gel, and Philips Zoom DayWhite. What is the best teeth whitening ...

Teeth-whitening treatments are relatively ... is plastic-free and offers a similar-strength formula to the Opalescence Go kit. It contains 36 percent carbamide peroxide, which is the equivalent ...