On this episode of Take My Money, PureWow creator Kate Kesselman finally got her hands on the viral Colgate Optic White Overnight Teeth Whitening Pen ($25; $19) and decided to put it to the test.

Want whiter teeth? See dentist-approved whitening toothpastes and tips for a brighter smile. Understand what really works for ...

“I typically recommend Colgate Optic White, since I personally think ... If you suffer from sensitive teeth or gums, opt for Before’s minty toothpaste. It’s made with gentle, soothing ...

Are at-home teeth whitening products effective? Dentists explain how to shop for whitening strips, toothpaste and more from Crest, Colgate, Act, Burt’s Bees and Lumineux.