Colgate · pen
Optic White Overnight Whitening Pen
A brush-on serum designed to sit on teeth overnight for slow-release whitening.
Last reviewed · Last updated · Reviewer: WhiteningProducts Editorial · Evidence: Moderate
Check current Amazon priceQuick facts
- Whitening ingredient
- Hydrogen peroxide
- Peroxide
- Low-strength hydrogen peroxide (per manufacturer)
- Fluoride
- No
- Vegan
- Not specified
- Sensitivity
- moderate
- Enamel safety
- standard
- Treatment duration
- Overnight
- Frequency
- Nightly for the initial course
Editorial review
How it works. The pen paints a thin, sticky film of hydrogen peroxide gel on the teeth after brushing. The film stays in contact overnight for extended low-strength exposure.
Best for:
- Users who prefer a leave-on routine
- Maintaining results between fuller courses
Advantages
- Simple to use
- No trays or strips required
- Good for touch-ups
Disadvantages
- Modest change on its own
- Formulation can taste medicinal
Ease of use. Brush, dry teeth, apply. Skip water for the next 30 minutes.
Whitening timeline. Gradual over 1-2 weeks.
Maintenance. Use 2-3x weekly.
Overall value. Good — great as a routine touch-up.
Editorial conclusion. Best used as a maintenance layer, not a replacement for strips or trays.
Comparison information
- Suited for stains
- coffee, tea, everyday
- Course length
- 1-2 weeks
- Maintenance schedule
- 2-3 nights per week
Frequently asked questions
Should I rinse after using it?
No — the film is designed to stay in place. Rinsing removes the active gel.