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leekohler said:
I know that whitening strips and bleaching are extremely bad for tooth enamel. Maybe that's why your teeth got discolored so quickly, Prof.
to be honest i haven't used Listerine since the summer when i was able to go out more, now that i'm back in school the basic toothpaste everyday gets the job done. but that's interesting, i never heard Listerine caused cancer.
no one had used tooth paste with backing powder?
i heard it helps whitening teeth and i used to try it but i could not keep trying for more than 3 days...i just keep forget doing things..