Quick answer
Professional peroxide whitening is the most effective and predictable option. Results typically last one to three years; charcoal and abrasive pastes only remove surface stain.
Why teeth darken
Surface stain from food and drink, and natural darkening of the dentine with age.
What works
Peroxide-based gels, applied professionally or with custom trays.
What to avoid
Abrasive powders that wear enamel, and unsupervised high-concentration products.
The white diet
For 48 hours after whitening, avoid coffee, tea, red wine, curry and other strongly coloured food.
Key takeaways
- Peroxide gels work; charcoal does not
- Whiten before veneers
- Expect 1–3 years of results
Frequently asked questions
Is whitening safe for enamel?
Professional whitening at the correct concentration does not damage healthy enamel.
About the authorDr. Sahand Taheri has practised general and aesthetic dentistry for 15 years and leads the Smile Studio in Etiler, Istanbul.
