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"$99 treatment special and paid extra $50 for take home trays and 1 tube.\r\n\t\r\n\tfirst and second 15 minute stages went smooth.....although be prepared to have all this stuff in your mouth for an hour.\r\n\t\r\n\tmy 3rd 15 min stage was no light and stronger whitener. I began to get zings right away. Probably 5-10 in that last session.\r\n\t\r\n\tThe 4 stage for me was 5 minutes of flouride paste to help..."^^<http://www.w3.org/2001/XMLSchema#string>
<https://www.realself.com/review/zoom-whitening-ouch>