I need more info. I have teeth erosion with an unusual presentation that my dentist has only ever seen in 1 other person. I used the whitening strips on top of another product. Anyone else out there with similar issues to compare notes/possible class action suit. I went after the other products company-dismissed but now reading this forum I think it was the combo of both products with the whitening strips weakening my teeth. Medical students and dentists are welcome to reply to hear more of my case.