Whitening your teeth with an LED light charged through your smartphone sounds like science fiction. But could it whiten teeth without causing sensitivity? I tried it to find out. Our editors and ...

While professional whitening treatments will always be the strongest (and quickest) option, these at-home kits gradually break down staining with minimal irritation.

What We Love: The mouthguard is very flexible and adjusts to the shape of your teeth. What We Don’t Love: It only comes with one whitening pen. The Colgate Teeth Whitening Kit is hassle-free and super ...