Just as its name implies, Opalescence Endo whitening gel is designed specifically to whiten endodontically treated teeth from the inside out. Your dentist will put the whitening gel inside your discolored tooth. Once inside, the oxygen molecules from the 35% hydrogen peroxide gel will break down the discolored molecules and whiten the tooth as a result. An Opalescence Endo whitening treatment may last between 1–5 days to achieve the desired results. Opalescence Endo teeth whitening has helped many patients restore their bright white smiles when they thought it was impossible or out of reach. Opalescence Endo teeth whitening isn’t right for everyone. Consult with a dental professional to determine if you are a good candidate for an Opalescence Endo whitening treatment. Opalescence Endo teeth whitening is vegan-no animal products are used.