Having heard so much about activated charcoal, I decided to buy this and am so glad I did. It's a multi-purpose product which is great for teeth whitening and also for face masks (used with Elmer's non-toxic glue to pull out blackheads!) I have only used it for teeth whitening so far and while it can get a bit messy and time consuming, it is sooooo worth it. And the price was pretty reasonable for the 40g. tub.
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