Ruined Enamel on my teeth
I literally used this product only once.  Immediately after use, my teeth lost the smoothness on the surface and was noticeably gritty afterwards.  Basically, this product rubbed away all of the enamel that is meant to protect your teeth in the first place.  Although it did whiten the teeth, it was made much worse a week later when they were more yellow than before using the product.  I can't believe that this product is sold on Amazon.  It should be removed immediately !
Rating: 1 stars