As a dentist I can tell you that there is no bleaching product on the market today, whether done in office by a dentist or at home by a consumer with either custom bleaching trays or whitening strips or any toothpaste for that matter, that will whiten both enamel and porcelain veneers or crowns or tooth-colored bonded restorations. The after photos of Cathy's teeth show all of her natural enamel teeth whitened as well as the several porcelain crowns she has on some of her posterior teeth. This cannot be possible unless those old... read full review »