The Zoom! light activated whitening gel's active ingredient is Hydrogen Peroxide. As the Hydrogen Peroxide is broken down, oxygen enters the enamel and dentin, bleaching colored substances while the structure of the tooth is unchanged. The Zoom! light aids in activating the hydrogen peroxide and helps it penetrate the surface of the tooth. A study has shown that use of the Zoom! lamp increases the effectiveness of the Zoom! gel by 33% or more, giving an average improvement of eight shades. The patented BriteSmile whitening treatment consists of a lamp filtered to emit light in the blue-green region of the spectrum (approximately 400-500 nanometers) and a patented delivery device, which illuminates all smile teeth at once. The BriteSmile light is used in combination with a patented peroxide gel, which has been optimized to obtain a maximal whitening effect and to ensure patient safety. The patented chemistry consists of a 15% hydrogen peroxide gel buffered at an approximately neutral pH that is compatible with tooth enamel. The gel also contains other ingredients such as glycerin and highly purified water to prevent tooth dehydration and to further ensure safety. The gel also contains a patented photo-initiator, which assists in chromophore destruction at the tooth's surface.