Whitens teeth nicely!
I was a little skeptical about buying this for teeth whitening purposes, but I can say it does indeed do the job.  I have had several compliments from people on how white my teeth look.  It is a little messy and weird to brush your teeth with a black powder, but once you get used to it, it's not a big deal.  I normally use it at night before bed.  I would recommend a separate toothbrush just for this powder.  Rinse well after using and then floss and brush again with regular toothpaste.
Rating: 5 stars