Teeth Whitening Methods

Q: How does in-clinic whitening compare to home whitening kits?

Unlike home trays, our treatment is carried out entirely in-clinic by a GDC-registered dentist. Here is how they compare:In-Clinic Laser: Dentist-administered 60-minute procedure, with advanced gum barrier protection for soft tissues; results visible from a single visit.Home Kits: Applied over several weeks, without in-clinic supervision or professional gum protection.

Step 1: Free Consultation

Before any treatment begins, one of our expert GDC-registered dentists carries out a free consultation, including a suitability check to ensure you are suitable for teeth whitening. During this consultation, the dentist also gives you a realistic, visual prediction of your likely results using our Predictive Shade Analysis.

Our Predictive Shade Analysis allows the dentist to measure the current shade of your teeth and compare it directly with a predicted post-treatment shade, so you can visualise the improvement. Surface activation follows, where the dentist cleans your teeth with a pre-treatment activator, removing accumulated micro-debris and preparing the enamel so your teeth are ready for whitening.

Step 2: Same Day Treatment

To begin, your dentist fits a cheek retractor to gently hold the lips back, giving a clear, safe view of your teeth and gums. Next, an advanced gum barrier is precisely applied to protect your soft tissue. Then, a professional-grade hydrogen peroxide whitening gel is carefully spread over your teeth.

After positioning a protective light guard and comfortable eyewear, a clinically proven Blue Spectrum LED light is evenly distributed across the treatment area, activating the gel to lift stains while staying cool. Throughout the session, your dentist monitors your comfort and results across two to three 15–20-minute cycles, completing the whole treatment within 60 minutes with immediate results.

Step 3: Instant Results + Aftercare

Following your session, you’ll see your new shade for yourself, and your dentist checks, confirms, and records your results for future reference. You’ll leave with clear, personalised aftercare advice covering the first 24-48 hours, everyday habits that help your results last, and guidance on maintaining a brighter smile long-term.

It’s often one of the simplest ways to feel more like yourself, whether that’s speaking up in a meeting, smiling more freely in photos, or simply feeling good every time you catch your reflection. With aftercare included in every visit, and support if you have questions afterwards, all that’s left is to enjoy your new smile.

The Whitening Process

Same day 60 minutes

Book Now: Free Assessment and Results Preview: Meet our dentists for a suitability check and Predictive Shade Analysis giving you a very clear understanding of expected results. Then, get your full treatment on the same day—instant results in under 60 minutes.

Exceptional Care & Patient Satisfaction

      EXCELLENT  
   Based on 1391 reviews 
    
 
 
 
   
 
 
       Posted on Google  
   
   Bailey Sutton 
 
 
 
 Trustindex verifies that the original source of the review is Google. staff are lovley and have come out with great results
  
 
      Posted on Google  
   
   Sarah Driscoll 
 
 
 
 Trustindex verifies that the original source of the review is Google. Fantastic and highly recommend! Great results and such a rapid treatment but very thorough and professional. Super professional from start to finish, the night ease of booking to the experience on the day.
  
 
      Posted on Google  
   
   Mustafa Osman 
 
 
 
 Trustindex verifies that the original source of the review is Google. I had a great experience doing my teeth whitening. The staff are very friendly and they give you a clear understanding of what the procedure will look like. The treatment its self was very easy and I had no complaints.
  
 
      Posted on Google  
   
   kareem khoury 
 
 
 
 Trustindex verifies that the original source of the review is Google. Had a great experience, very polite and pleasant reception staff and doctors, would highly recommend.
  
 
      Posted on Google  
   
   Nurfarah M 
 
 
 
 Trustindex verifies that the original source of the review is Google. Lovely relaxing setting. Dentist explained clearly about the services and what to expect. No teeth sensitivity during treatment and great results - I’m happy!
  
 
      Posted on Google  
   
   Miranda Tilden 
 
 
 
 Trustindex verifies that the original source of the review is Google. great experience! everyone was very kind and i’m super happy with my results!
  
 
      Posted on Google  
   
   M. K. 
 
 
 
 Trustindex verifies that the original source of the review is Google. Coming back every year. Uber-professional and friendly. The results are really undoubtedly great.
  
 
      Posted on Google  
   
   Nadia Aslam 
 
 
 
 Trustindex verifies that the original source of the review is Google. Great costumer service and professionalism, 10/10 experience and results. Would highly recommend!
  
 
      Posted on Google  
   
   Kash 
 
 
 
 Trustindex verifies that the original source of the review is Google. the best teath whitening experience I’ve ever had in so happy with the results😆😆
  
 
      Posted on Google  
   
   imogen lambert 
 
 
 
 Trustindex verifies that the original source of the review is Google. Lovely experience! So happy with my teeth and Dr May was very calm and reassuring during the entire process.  Would deffo recommend!!!

Frequently asked questions

Is teeth whitening safe?

Yes, teeth whitening is safe when carried out by a qualified dentist. UK law requires it to be performed by a registered dentist, and all our dentists are GDC-registered, including a dentist with over 40 years of clinical experience. We’ve been providing teeth whitening for over 15 years, treating thousands of patients with an average improvement of 6-8 shades, with some patients achieving an improvement of up to 10 shades in a single visit.

How does in-clinic whitening compare to home whitening kits?

Unlike home trays, our treatment is carried out entirely in-clinic by a GDC-registered dentist. Here is how they compare:

In-Clinic Laser: Dentist-administered 60-minute procedure, with advanced gum barrier protection for soft tissues; results visible from a single visit.
Home Kits: Applied over several weeks, without in-clinic supervision or professional gum protection.

Is the consultation free, and can I be treated the same day?

Yes, your initial consultation is free, with no obligation to proceed. Before your appointment, our team will call you to go over the details and costs, so there are no surprises. On the day of the appointment, the dentist will check your suitability and perform a Predictive Shade Analysis — an assessment predicting your achievable results — before your full 60-minute laser treatment, which can be carried out the same day, in a single visit.

How much does teeth whitening cost?

Our laser teeth whitening starts at £199. This price covers your free dentist consultation, Predictive Shade Analysis, the in-chair treatment, and full aftercare advice.

Is teeth whitening painful?

No, teeth whitening itself isn’t painful. Some patients experience mild, temporary sensitivity during or shortly after treatment, which typically settles within a few hours. Because your gums are fully protected throughout by our advanced gum barrier formula, discomfort is kept to a minimum and in most cases, you are able to carry on with the rest of your day as normal.

Are your results trusted by patients?

Yes — we’re rated 4.9 out of 5 on Google from 1,917 reviews, and 4.9 out of 5 on Trustpilot from over 200 reviews, having treated more than 25,000 patients over 15 years, with every treatment carried out by a GDC-registered dentist.

Enquire Today for Teeth Whitening in London

Don’t settle for time-consuming home whitening kits or the promises of whitening toothpaste which leave much to be desired. With a simple one-hour session at our teeth whitening clinic in London, you’ll go home beaming, literally, with the satisfaction of having had five-star treatment.

Don’t hesitate to book your FREE consultation at Harley Teeth Whitening today. For more information about our services, don’t hesitate to get in touch with us by phone on 020 7724 1646 or by filling out and submitting your query using our online contact form. We look forward to hearing from you.