Did nothing!!
Unfortunately it didn't work for me and my boyfriend. We applied this everyday for two weeks minimum and we saw no difference! I agree with one of the reviewers who said that the pictures of the people who say it whitened their teeth is deceiving, because they took a picture in different lighting which caused their teeth to look whiter. Maybe they were paid to review this product, who knows. All I know is it did nothing for me. Not one shade changed from the first day all the way until now, weeks later. The charcoal also gets in your gums and in between your teeth and you'll have to floss a good amount to get the black off. The picture with the checkered shirt is before and the picture with the gray shirt is after.
Rating: 1 stars