Review (1/5): Had a terrible reaction to this. Maybe I'm rare.
While this did manage to clean my teeth, after about 2 weeks, I had a horrid reaction to this. The inside and outside of my lips and mouth felt inflamed and made it difficult to eat. Before anyone thinks it was something else, I had tried stopping use on everything and changed my toothpaste to sensitive and that still didn't help. I had gone as far as going to my dentist, primary doc, ENT, and dermatologist to see what was going on. After numerous prescriptions, I was still inflamed and had a horrid rash on the outside of my lips. It wasn't until I stopped using this product that it all went away a week after. The oral surgeon I had to go to said that charcoal powders are just a scam and there are other ways to whiten your teeth. So if you end up having a reaction like I did, know it's the powder and not something else.