Boutique Whitening: What It Is And How Dentist Home Whitening Works
By Daniel Smith, founderShare
Boutique Whitening is a home whitening system that you get through a dentist. On its own patient pages, the brand describes four steps: you find a dentist who offers it, the dentist examines your teeth and gums and takes moulds, Boutique's laboratory makes whitening trays to fit your mouth, and you wear those trays at home with one of its peroxide gels. The gels come in a daytime version at 6% hydrogen peroxide and night-time versions in carbamide peroxide at 10% or 16%, plus an overnight blend. In the UK, tooth whitening products above 0.1% and up to 6% hydrogen peroxide, present or released, are for dental practitioners to supply, which is why Boutique is a dentist product rather than something you buy off a shelf. Below: what each gel is, how long the brand says to wear it, how carbamide peroxide relates to hydrogen peroxide, what UK law says word for word, what it costs, and where peroxide-free whitening at home fits.
What is Boutique Whitening?
Boutique Whitening is a range of whitening gels and custom trays provided through dental practices. The brand says on its patients page that "Boutique was built by a dentist with 20 years' experience", and on its products page that its formula "was the result of a collaboration between UK dentists and master chemists from Canada and the USA." It also states plainly: "Teeth whitening must always be administered by a dental professional."
Everything this post says Boutique says comes from the brand's own patient pages, read in November 2026, and nothing else. We do not comment on how well another company's product works, and we have not quoted any claim about results. The dentist who supplies it is the right person to ask what you can expect.
How Boutique Whitening works: the four steps
The brand sets the process out in four stages on its patients page:
- Find a dentist. Boutique is offered through dental practices, so the first step is a practice that provides it.
- Check up. In the brand's words: "Your dentist will examine your teeth and gums to make sure your teeth are ready, restore any cavities and take moulds for your bespoke whitening trays."
- Trays. "Your unique mould is sent to our laboratory where our technicians will precision manufacture whitening trays to fit your mouth very precisely."
- Treatment. "Receive your trays from the dentist and start using them at home with our whitening gels."
The FAQ fills in the timings. It says "A typical procedure would require one visit for a comprehensive dental examination. Legally, this must be done prior to teeth whitening." It says impressions or scans can be taken at that visit, and that you return about two weeks later to have the trays fitted. You then whiten at home for between 3 and 4 weeks, or until you are happy with the shade, and finish with a final assessment and photographs at the practice.
The gel comes in syringes. The brand's FAQ says "Each syringe of Boutique Whitening should last around 5 days when whitening the upper and lower teeth", and warns: "If you use too much gel, it may leak, causing sensitivity owing to irritation of the gums." That is one reason the amount you use, and how you use it, comes from your dentist.
Boutique by Day, Boutique by Night and the other gels
The brand's products page lists four whitening gels. The strengths below are exactly as Boutique states them:
| Gel | Strength, as Boutique states it | When it is worn |
|---|---|---|
| Boutique by Day | 6% hydrogen peroxide | During the day |
| Boutique by Night | 10% or 16% carbamide peroxide | Overnight |
| B1 Black Diamond | 16% carbamide peroxide | Overnight ("works whilst you sleep") |
| Boutique Hybrid Pro | "a blend of hydrogen peroxide and carbamide peroxide at 4.25%" | Overnight ("This overnight formula") |
You do not choose the gel yourself. The products page says: "Your dentist will ask you some questions about your lifestyle and preferences, before recommending which range of products is ideal for you."
How long do you wear Boutique Whitening?
It depends on the gel, and the figures here are the brand's. Its FAQ describes Boutique by Day as "a 6% hydrogen peroxide gel" and recommends "at least 1 to 1.5 hours of wear time". For Boutique by Night, the FAQ says the protocols are "all designed for a minimum of 4 hours' wear time", with the trays kept in overnight, and adds: "We have a 10% carbamide peroxide gel, or a 16% carbamide peroxide gel", both of which it says are designed to be worn overnight.
Those are a manufacturer's guidelines for a product a dentist supplies and sets up. The routine you follow is the one your dentist gives you.
Carbamide peroxide and hydrogen peroxide
Boutique sells its daytime gel in hydrogen peroxide and its night-time gels in carbamide peroxide, and the difference matters because UK law is written in hydrogen peroxide.
The brand explains carbamide peroxide in its own FAQ: "Carbamide peroxide is hydrogen peroxide compounded with urea." It says the urea stabilises the formula and gives it a longer shelf life than hydrogen peroxide alone, and that "In the presence of water, carbamide peroxide degrades into urea and hydrogen peroxide."
The American Dental Association (ADA), a United States source, describes the same relationship in general terms: carbamide peroxide is an ingredient "which releases about one-third of its content as hydrogen peroxide, a strong oxidizing agent." That is a general statement about the chemical, not a figure for any Boutique gel, and the brand does not publish a hydrogen peroxide equivalent for its carbamide gels on the pages we read, so we are not going to work one out. What the law asks is simple to state: a carbamide gel is judged by the hydrogen peroxide it releases. The chemistry of peroxide on teeth, including what it does to teeth and gums, is set out in how hydrogen peroxide affects teeth.
Boutique Whitening and UK law
The rule that decides how Boutique reaches you is the hydrogen peroxide entry, number 12, in Annex III of the cosmetic products regulation as it stands in UK law. The entry covers "Hydrogen peroxide and other compounds or mixtures that release hydrogen peroxide, including carbamide peroxide", and it sets two tiers for whitening:
- Oral products, including tooth whitening or bleaching products, at 0.1% hydrogen peroxide or less, present or released. This is the level that can be sold to the public.
- Tooth whitening or bleaching products above 0.1% and up to 6% hydrogen peroxide, present or released. The regulation's conditions, in its own words: "To be only sold to dental practitioners. For each cycle of use, the first use to be only done by dental practitioners or under their direct supervision if an equivalent level of safety is ensured. Afterwards to be provided to the consumer to complete the cycle of use." And: "Not to be used on a person under 18 years of age."
Boutique by Day is labelled at 6% hydrogen peroxide, which is the top of that second tier. For the carbamide gels, the regulation applies to the hydrogen peroxide they release. The brand's own FAQ says the same about age: "The Regulations and EU Directive specifically state the product must NOT be used on patients aged under 18."
So the dentist route is not a sales choice on the brand's part. It is the route the regulation sets for products in that tier: sold only to dental practitioners, the first use done by a dental practitioner or under their direct supervision, and the rest of the cycle completed at home. The examination comes first as well: Boutique's FAQ says it is a legal requirement that it "must be done prior to teeth whitening". Who is allowed to carry out whitening on another person is a separate question with its own regulator, and our post on how UK whitening law works covers both rules together.
Two other dentist systems we have written about sit under the same entry and are explained the same way, from their makers' own pages: Opalescence and the UK rules, and Philips Zoom and Pola Night.
How much does Boutique Whitening cost in the UK?
Boutique does not publish a price on its patient pages: we read the patients home page, the products page and the FAQ in November 2026 and none of them gives a figure. The fee is set by the dental practice that provides it, and we do not quote a figure for another company's treatment. For the general picture, including the price ranges Bupa Dental Care publishes for a dentist's at-home tray kit and for in-practice whitening, see our UK guide to your teeth whitening options.
How long does Boutique Whitening last?
The brand's FAQ is direct about it: "Teeth whitening is not permanent." It says how often you need to top up depends mainly on lifestyle, and names smoking and staining food and drink such as red wine, coffee and curries. Your dentist advises on top-ups.
Why we wrote this
I am Daniel Smith, and I started Pure Glow. Before that I spent fifteen years at Jaguar Land Rover, six of them in health and safety. That is not dental regulation and I will not pretend it is, but it is part of why I care what goes into something people put on their teeth. When I started Pure Glow I bought every whitening strip I could get hold of and catalogued every fault, and I spent ten months testing, rejecting four formulas before settling on the one we use now.
Boutique is a dentist product, and a dentist is the person to ask about it. What we can do is set out what the brand says on its own pages, and the regulation in its own words, so you can check every line yourself. For how a dentist's tray course and whitening you do yourself compare in general, our post on dentist whitening versus strips weighs the two.
Where peroxide-free whitening at home fits
If what you want is to whiten at home without a dentist supplying the product, the 0.1% limit decides how much peroxide a product sold to you directly can contain. Peroxide-free whitening uses a different chemistry, so that cap is written for something it does not contain.
Our PAP+ whitening strips use PAP, phthalimidoperoxycaproic acid, and the ingredients on our box contain no hydrogen peroxide or carbamide peroxide. PAP is an oxidising agent. It lifts surface stain, and it also works on the coloured compounds inside the tooth, by a gentler route than peroxide takes. The chemistry is explained in what PAP teeth whitening is.
There are no moulds, no trays and no syringes, and why we left peroxide out altogether is on our page about peroxide-free teeth whitening. The course is one treatment a day for 14 days, an upper and a lower strip each time: brush, dry your teeth with a towel, and wear the strips for a minimum of 30 minutes. A sip of water while they are on is fine. The strips are dry-fit with a no-slip grip, so they stay where you put them, and clean removal leaves no messy residue behind. The result is up to 6 shades whiter in 14 days, depending on where you start.
The formula is clinically tested for zero sensitivity, dentist approved and enamel safe, and sensitivity has its own page on teeth whitening for sensitive teeth. It carries hydroxyapatite, which supports the enamel surface, and xylitol, which helps reduce the bacteria that cause plaque build-up. It is safe for daily use across the course, which is what the 14 days are designed around.
The strips are not suitable for children under 12. They will not change the base colour of a crown, veneer or filling, though they can lift staining that has built up on top of one. And the 14-Day Two-Shade Guarantee applies: if you are not at least two shades whiter, you get a full refund.
None of this is a comparison with Boutique. A dentist-supplied peroxide course and a peroxide-free strip you buy yourself are different routes under different rules, and which suits you is your call, ideally with your dentist if you have dental work or any concern about your teeth or gums.
Frequently asked questions
Is Boutique Whitening legal in the UK?
UK law allows tooth whitening products above 0.1% and up to 6% hydrogen peroxide, present or released, only through dental practitioners. Boutique by Day is labelled at 6% hydrogen peroxide, the top of the tier that is "To be only sold to dental practitioners", with the first use in each cycle done by a dental practitioner or under their direct supervision, and not for anyone under 18. For the carbamide gels, the law applies to the hydrogen peroxide they release.
Is Boutique Whitening peroxide based?
Yes. The brand lists Boutique by Day at 6% hydrogen peroxide, Boutique by Night at 10% or 16% carbamide peroxide, B1 Black Diamond at 16% carbamide peroxide, and Hybrid Pro as a blend of hydrogen peroxide and carbamide peroxide.
Does Boutique Whitening work?
We do not comment on how well another company's product works. Your dentist examines you before treatment and recommends a gel, so they are the person to ask what result you can expect from your own starting point.
How much does Boutique Whitening cost in the UK?
The price is set by the dental practice. Boutique's patient pages, read in November 2026, do not publish one.
What is the difference between Boutique by Day and Boutique by Night?
Boutique by Day is a 6% hydrogen peroxide gel, and the brand recommends at least 1 to 1.5 hours of wear time. Boutique by Night is a 10% or 16% carbamide peroxide gel designed for a minimum of 4 hours' wear, kept in overnight. Both are worn in trays made from moulds of your teeth.
How long does a Boutique syringe last?
The brand says each syringe "should last around 5 days when whitening the upper and lower teeth."
Can under 18s use Boutique Whitening?
No. For tooth whitening products above 0.1% and up to 6% hydrogen peroxide, present or released, the law says: "Not to be used on a person under 18 years of age." Boutique's own FAQ says the product "must NOT be used on patients aged under 18."
Ready to start whitening?
One box is a full 14 day treatment. Two boxes cover 28 days for less per strip. Free UK delivery on every order.
Related reading:
Sources:
- Boutique Whitening, patients home page, read November 2026. For the four steps, the founding dentist and the dental professional line.
- Boutique Whitening, products page, read November 2026. For the gels and their strengths.
- Boutique Whitening, Boutique FAQ page, read November 2026. For wear times, carbamide peroxide, appointments, syringes, top-ups and the under 18 rule.
- American Dental Association, Oral Health Topics: Whitening. A United States source, for how carbamide peroxide relates to hydrogen peroxide.
- Regulation (EC) No 1223/2009 on cosmetic products, Annex III, entry 12, legislation.gov.uk. For the hydrogen peroxide tiers, conditions and warnings as they stand in UK law.