Messy & no tast
I gave it a 3 star for whitening because I do not know if it works.  I used it one time and will most likely not use it again.  I had black all over my sink, mirror and my shirt.  It has no taste and when I used it before I went to bed, I felt like I still had the powder in my mouth.  Took a while to rinse my mouth to get out what I did.  This was the first time I ever used charcoal tooth powder and so far I am not impressed.  I have another tooth powder I purchased which is not a black charcoal, which I've been using and is all natural and although I do have a little mess, nothing like this one.  My daughter tried one too and warned me vehemently not to use it.  I feel like I should have listened to her.
Rating: 1 stars