Guest guest Posted January 4, 2012 Report Share Posted January 4, 2012 Most tooth bleaching kits also contain 'carriers' for the peroxide component, which may include some or all of the following: propylene glycol, polyethylene glycol (PEG), or glycerine. These chemicals, in conjunction with the peroxide of choice, add to the sensitivity problem. http://www.man-health-magazine-online.com/tooth-whitener.html Quote Link to comment Share on other sites More sharing options...
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