While a solid oral-hygiene routine is key to healthy teeth and gums, to achieve truly pearly whites, sometimes you need a little boost. You can remove up to 15 years of stains (and avoid that costly ...

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Want more deals? Visit CNN Underscored’s Guide to Black Friday for wall-to-wall coverage of the best discounts to be found during the biggest shopping event of the year.

Lauren Allain is a freelance journalist covering deals at Mashable. She graduated from Western Washington University with a B.A. in journalism and holds an M.B.A from Webster Leiden. You can find more ...