
I have purchased this particular product before and it works well for the number of treatments included. It didn't make my teeth sensitive, but everyone is different. I have white spots on some of my teeth and have been investigating why they are appearing and it doesn't seem like a big deal. In any case, they disappear after an hour. My teeth were very stained from the coffee and it can't do much if I don't give up coffee. I hope this box actually whitens my teeth.

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