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10 Teeth-Whitening Kits That Actually Work
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Best Teeth-Whitening Pen

Colgate Optic White Overnight Whitening Pen ($20)

The Colgate Optic White Overnight Whitening Pen is an easy, less extensive whitening option. After applying the serum to your teeth at night, brush it off in the morning when you wake. In a couple of days, you'll be looking at a bright set of pearly whites. This treatment contains hydrogen peroxide.

Best Teeth-Whitening Pen
Colgate Optic White Overnight Whitening Pen
$20
from amazon.com
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