this review title is: whitens but and the content is: it does whiten but about days after using it i noticed the tip of my tongue was inflamed sore and covered in white bumps i noticed after searching on the web for a cause that others have had this problem too or worse i stopped using optic white and my tongue is getting better slowly i am years old and had never had this problem before.there are other information for this review, one is this reviewer did not purchase it and the other is 12 people think this review is helpful.