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Title: Great Nail Hardener
Review: I used this product after a friend recommended it and found it to be amazing. The Mavala Scientifique is an incredible nail hardener- on bare nails or over polish it seems to work well for both. Although many of the reviews listed here are for another product meant to discourage nail biting, the one I am specifically pointing out is the "penetrating nail hardener" which is truly great.
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