For a brighter, whiter smile without the wait, opt for Opalescence Boost, an in-office, chemically activated whitening treatment that offers results in about an hour. Advanced Opalescence Boost features a unique, chemically activated formula that allows your dentist to whiten your teeth without the bothersome heat or ultraviolet rays of a light. Opalescence Boost also contains potassium nitrate and fluoride, which help to improve oral health by strengthening enamel, decreasing sensitivity, and offering increased cavity prevention. Immediate Opalescence Boost offers results in about an hour. The dentist-supervised, in-office procedure is safe and effective, and offers a brighter, whiter smile after just one appointment.