How Far Before an Event Should You Start Whitening Your Teeth?
Short answer
Start about two to three weeks before the event. Most at-home whitening courses take 5 to 14 days: Opalescence Go runs 5 to 10 days, and Philips says its Zoom take-home gels give optimal results within 1 to 2 weeks. The extra days leave room for a break if your teeth feel sensitive, and for a touch-up just before the day.
How many days does at-home whitening take?
| Product | Daily wear | Course |
|---|---|---|
| Opalescence Go 15% | 15 to 20 minutes | 5 to 10 days |
| Philips Zoom DayWhite | 30 to 60 minutes | 1 to 2 weeks |
| Philips Zoom NiteWhite | 2 to 4 hours or overnight | 1 to 2 weeks |
| Philips Zoom whitening pen | Twice a day | 2 weeks, or as a touch-up |
Philips reports results of up to 8 shades whiter with NiteWhite over two weeks of daily use.
When should I start whitening before a wedding?
Three weeks out is a comfortable start. A sample timeline:
- 3 weeks before: start your course.
- 1 to 2 weeks before: finish the course.
- The final week: touch up with a whitening pen if you want an extra boost.
What if the event is less than two weeks away?
Opalescence Go is the quickest option. It is worn for only 15 to 20 minutes a day, with a full course in 5 to 10 days, and the prefilled trays need no custom trays.
What if your teeth are sensitive?
Leave extra time. Use a sensitivity toothpaste for two weeks before you start, as Philips advises, so start about four weeks out. See whitening sensitive teeth.
What should I avoid during the course?
Nothing drastic. Research has not found that avoiding coffee during a course improves results. See coffee and whitening.
Sources and evidence
- Healthline, "Teeth Whitening: How It Works, Types, and Side Effects" (2022): typical at-home timelines.
- Ultradent, Opalescence Go instructions: wear time and course length.
- Philips, Zoom take-home whitening instructions (2022) and NiteWhite product information: course length, results over two weeks.
- Philips, Zoom whitening pen instructions: twice daily for two weeks.
Related questions
How do you use Opalescence Go?
Seat the trays, remove the outer layer, wear for 15 to 20 minutes, then brush. See how long it takes.
Should I choose NiteWhite 16% or 22%?
22% for faster results, 16% for sensitive teeth. See the comparison.
How long does teeth whitening last?
The NHS says around 3 years. See the full answer.
Relevant products
General information only, not dental advice.