Add Yahoo as a preferred source to see more of our stories on Google. A bright smile can light up a room, but keeping teeth white often takes a little extra effort —especially for coffee and red wine ...

A bright smile can light up a room, but keeping teeth white often takes a little extra effort —especially for coffee and red wine lovers. At-home whitening kits are effective, but many get a bad rap ...

Forget strips, gels, and pastes. Your next tooth-whitening and repairing substance might well be a new powder developed by Shanghai researchers. You'll want to use it with an electric toothbrush ...