Effective way to whitening your teeth up to 2-4 shades in just a couple minutes. The fastest way of bleaching your teeth in-office is by using a zoom light, which activates the hydrogen peroxide and the bleaching gel, which in turn whitens your teeth. The way it works is hydrogen peroxide releases oxygen molecules.The molecules are what lifts the intrinsic stains out of your teeth. We use a concentrated amount of 35% of hydrogen peroxide on the teeth. The laser light acts as a catalyst to release those oxygen molecules so we can break up the stains in the teeth.