this review title is: disapointed and the content is: i was surprised that the powder was black and when i use it my entire sink is covered with black powder and it is hard to clean so i stopped using it cannot tell you if it got my teeth whiter i wish is was not so messy then maybe i would have used it and got the results they promised.there are other information for this review, one is this reviewer did purchase it and the other is 0 people think this review is helpful.