This at-home whitening kit is at one of its lowest prices for a limited time. The kit retails for $49.99 and is currently on ...

This kit delivers on its pro-level, smile-brightening claims, reviewers say. It promises to remove up to 25 years' worth of ...

Crest says its express whitening strips contain a 10% concentration of hydrogen peroxide. For context, the original 3D Whitestrips, which have been shown to work, reportedly contain only 6% ...