Tobacco and coffee affect the outer layer of your teeth; if left untreated, these stains can make your teeth look unhealthy and lose their whiteness. Stained teeth can be a real confidence killer, ...

Dreaming of a whiter smile but frustrated by those persistent stains thanks to the effects of your daily coffee (or wine) fix? Less-than-white teeth can be a real confidence killer, but don't worry — ...

Add Yahoo as a preferred source to see more of our stories on Google. If you've found yourself looking extra closely in the mirror lately or zooming in on pictures in your camera roll to analyze your ...