Pros

  • Easo-use with clear instructions and a convenient pen format.
  • Comes with a stand for convenient storage.
  • Effective whitening noted, with improvements seen after just 7 days and significant results after 2 weeks.
  • No sensitivity or pain reported during use.
  • Features a protective overnight shield for teeth.
  • Boosts confidence and increases smiling.
  • Compatible app provides usage guidance and session logging.
  • Easy application without sensitivity, appealing for those with Invisalign retainers.
  • Superior to whitening strips for even application across teeth.

Cons

  • Initial activation requires numerous clicks to dispense the product.
  • Application can be challenging as teeth need to be completely dry, complicated by saliva.
  • Gel texture can be gritty, leaving residue that requires thorough brushing in the morning.
  • The clear product makes it difficult to see during application.
  • Serum can harden on the brush, complicating future applications.
  • Minimal whitening effect for some users, especially near gum areas.
  • Uneven results reported, with some areas not showing expected improvement.
  • Difficult to capture results effectively in photos due to lighting variations.
  • Some users found the serum difficult to remove in the morning.

Bottom Line

The Colgate Optic White Overnight Teeth Whitening Pen is a convenient and user-friendly solution for those looking to whiten teeth with minimal sensitivity. Its ease of use, along with the accompanying app, provides excellent support for maintaining a whitening routine. However, the product may require a bit of effort to ensure even application, especially due to initial dispensing challenges and the necessity of dry teeth. For those seeking quick and noticeable results, this product offers potential, but the outcomes may vary with darker stains and pre-existing conditions.

Lowest at Amazon
$19.97 at Amazon
Lowest at any Popular Retailer
$17.81 at Bonanza
How we researched this

About this review: We pulled together findings from professional reviews and hundreds of user reviews, and cross-referenced them with ShopSavvy's pricing data from 31 retailers to give you the short version.

Where to Buy

Prices last updated: April 14th 2026 9:00 pm
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