Bright white smile after professional teeth whitening treatment
Treatments7 min read

Teeth Whitening: Your Complete Guide to Options, Costs & Safety

Is teeth whitening safe? Compare professional in-chair, take-home, and laser whitening options. UK costs, safety, results, and how to choose the right treatment.

Professional teeth whitening is one of the most popular cosmetic dental treatments in the UK, with demand growing by over 30% in the last five years. Costs range from £150 for take-home kits to £1,000+ for premium laser treatments. This guide covers every option, what results to expect, safety considerations, and how to find a qualified provider.

Professional Whitening Options Compared

There are three main types of professional teeth whitening available from UK dentists:

TypeCostTimeResultsLongevity
In-chair (Zoom/Enlighten)£300 – £7001–2 hours6–8 shades lighter1–3 years
Take-home kit (custom trays)£150 – £4002–4 weeks4–6 shades lighter6–12 months
Laser whitening£500 – £1,0001 hour8–10 shades lighter2–3 years
Combination (in-chair + home)£400 – £8001 visit + 2 weeks8–10 shades lighter2–3 years

Is Teeth Whitening Safe?

Yes — when performed by a qualified dental professional. In the UK, teeth whitening is a regulated dental procedure. Only registered dentists, dental hygienists, and dental therapists can legally perform whitening treatments.

Key safety points:

Only products with up to 6% hydrogen peroxide (or 16% carbamide peroxide) may be used by dental professionals
Over-the-counter products with more than 0.1% hydrogen peroxide are illegal in the UK
Beauty salons, shopping centres, and mobile whitening services are operating illegally if they apply whitening products
Professional whitening includes a dental examination first to check for cavities, gum disease, or sensitivity issues
Temporary sensitivity is common but usually resolves within 48 hours
Whitening does not damage enamel when performed correctly

What Results Can You Expect?

Results depend on the type of treatment, your starting shade, and lifestyle factors. Most patients see their teeth lighten by 4–8 shades with professional treatment.

Whitening works best on yellowed teeth. It is less effective on grey or brown discolouration, tetracycline staining, or teeth with lots of dental work (crowns and fillings do not whiten). Your dentist should manage expectations during your consultation.

To maintain results, avoid heavy staining from coffee, red wine, tea, and smoking. Using a whitening toothpaste and occasional top-up treatments helps prolong the effect.

Who Should Avoid Whitening?

Whitening is not suitable for everyone:

Pregnant or breastfeeding women (as a precaution)
Children under 18
People with untreated cavities or gum disease (treat these first)
People with very sensitive teeth (discuss options with your dentist)
Those with extensive dental restorations (crowns, veneers — these will not whiten)

Frequently Asked Questions

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