Caution
I used (1) of my 10.  I am typically decent with pain and do not complain.  This product hurt my teeth so bad! I have never had sensitive teeth.  I would be ok if after the pain lasted an hour or so........ My teeth were still hurting so bad hours later. I just could not believe it was still hurting many hours later. Now I am stuck with an expensive whitener I cannot use.. Any suggestions offered as to how maybe I can build-up  my teeth prior to trying this again??
Rating: 1 stars