
I've been using teeth whitening products for years when I want to whiten my teeth. Saw it on Revain and saw 44% good reviews so I've been using it for a few weeks now and no change. Now I think it's 44% because I had 40% and there's a kind of "burn" of it. I can't even tell it's on my teeth and gums in my trays. I do not know. I don't review much unless I think it's a product we spend money on so don't spend your money on this one.

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