It’s easy syringe delivery, four concentrations of carbamide peroxide (10%, 15%, 20%, and 35%), and three great-tasting flavors (Mint, Melon, and Regular) allow for maximum flexibility based on your needs. Opalescence tooth whitening gel is vegan—no animal products are used. It is also certified gluten free and certified kosher, so it fits in with diverse lifestyles and beliefs. The sticky, viscous formula helps keep the gel and tray in place, without migrating to soft tissues.<br><br>It is sweetened with xylitol, which may reduce the risk of tooth decay, with a pH that closely matches the natural pH of a patient’s saliva. Opalescence teeth whitening products are among the most stable whitening products in the industry, each maintaining virtually all of its effectiveness over the course of its shelf life. Because delivery times vary, Opalescence whitening products are formulated with transit time in mind. Although shelf life is ultimately dependent on how each product is stored, our teeth whiteners will remain stable even after being shipped across the country.<br><br>With over 30 years of experience, more than 50 teeth whitening awards earned, and over 100 million smiles brightened, Opalescence teeth whitening is the #1 professional teeth whitening brand on the planet for a reason. The name Opalescence teeth whitening is synonymous with quality. Opalescence teeth whitening gels, trays, syringes, and toothpastes are manufactured in the USA from globally sourced materials.