This Review Title is Questionable product and the content is: These strips disintegrate too much in your mouth after storing for extended time, even within expiration date time frame. There are tell tale signs of a bootleg product as in misspellings on back of package. Also, the ingredients do not mention peroxide as does the Crest brand, and country origin and FDA information are not mentioned..There are other information for this review, one is This reviewer did purchase it and the other is 2 people think this review is helpful.