Zoom Whitening is an in-office teeth whitening procedure that can brighten stained or discolored teeth in an hour. Using ultraviolet light to supercharge the whitening gel, Zoom Whitening can whiten teeth up to eight shades in one procedure.

However, a substantial percentage of RealSelf member reviewers say they weren’t impressed. Only 58% say it was “Worth It,” and those who were disappointed say they either didn’t get the promised result, or that the treatment supercharged their tooth sensitivity more than it whitened. “I would never promise amazing results with any teeth whitening system,” says Dr. Michael Ayzin, a dentist in Costa Mesa, California. “I usually tell a patient to not expect color of the teeth to be like a white piece of paper. They will definitely become whiter, but to what extent depends on many factors.”