Early Black Friday deals are already serving up big smiles. The Crest 3D Whitestrips Professional Effects Kit just dropped in price for Amazon’s early Black Friday deals, making it the perfect moment to get your teeth holiday-ready. This No.1 bestseller has nearly 100,000 rave reviews and was purchased 90,000 times last month alone — and now it’s just $29.99, a fraction of what you’d pay for an in-office whitening treatment. Delivering professional-level results of up to 19 shades whiter, the

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