I have always been skeptical about charcoal for teeth whitening, but the deal was too good to pass up. Let me just say, it’s worth it people. My teeth literally feel dentist clean after using it, I can definitely tell a difference in the color of my teeth after 3 brushes. But best of all, I’ve had a small stain on a front tooth for about a year. It didn’t even come off at the dentist and I was convinced the tooth was dead or something. I scrubbed it with the charcoal using a qtip for about a minute. ITS GONE. my tooth is white and shiny again and that made it all worth it!