"Hydroxyapatite is natural. It is a type of calcium that makes up bones and teeth," says Lai. "Nano-hydroxyapatite relates to ...

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Let's Find Out Which Yellow asmr Snack will Stain My Clean teeth!? How well Can I clean then with HiSmile V34 Toothpaste!?

Read on for the best at-home teeth whitening products--think Colgate, Crest and Luelli--that tackle everything from lingering coffee stains to everyday dullness.