Last year, Americans spent more than $1 billion on over-the-counter bleaching products, such as this bottle of Listerine Whitening rinse. (Photo by John VanBeekum/Miami Herald/MCT/Sipa USA Stock Photo - Alamy
Crest 3D White Brilliance Alcohol Free Whitening Mouthwash Clean Mint 16.9 fl oz on OnBuy
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