The verdict

The short version, before the detail

Here is what this review found, with the single source each line rests on. Everything about Supersmile comes from pages on supersmile.com fetched on 5 September 2026, and everything about the science comes from PubMed records checked the same day. Where a fact could not be verified, the line says so instead of guessing.

• Still sold, direct. The gum's product page on supersmile.com was live and returned a normal response on 5 September 2026. The brand sells it itself. The 12-pack did not appear as its own listing in an Amazon or Walmart search that day; only bundled kits containing floss or lip balm did.
• A real 1987 brand whose founder has died. The company page names Dr. Irwin Smigel and his wife Lucia Smigel as founders in 1987. The history page says he has since passed and the brand carries on. The legal entity behind the site is not stated anywhere we looked; the Terms of Service footer still reads "© Copyright 2010 Supersmile".
• Eight ingredients, xylitol first. The list is published in full on the product page. The brand states "Sweetened with 65% Xylitol, and no other added sugars". No piece weight is given, so that percentage cannot be turned into milligrams.
• Calprox is described, not quantified. Three separate pages describe it consistently as encapsulated calcium peroxide with minerals. No page states the amount per piece.
• Zero PubMed records for Calprox. A term search on 5 September 2026 returned nothing. No indexed trial names Supersmile or this gum. There is no study claim to make about this product, so this review makes none.
• 29 cents a piece. $3.50 for 12 pieces, with a $5.00 compare-at price shown on the page. About five times the per-piece price of Trident White in our review, and about a fifth of the price of our own gum.
• Two different star ratings on one page. The page's structured data states 4.9 out of 5 from 43 reviews; a review widget on the same page shows 4.6 out of 5 from 997 ratings. Both are the brand's own display. The individual review text loads through a script, so we could not read the reviews themselves and quote none.

If you only wanted a one-word verdict: there is none, because this page does not hand out verdicts about brands. It is a small, cheap, published-label sugar-free gum with one proprietary ingredient whose effect nobody outside the company has measured in public. That is a common state of affairs in whitening gum, and Trident White, the biggest name in the category, sits in a similar one.

Comparison table

Supersmile, Trident White and Minvelle, side by side

Three gums, three different purposes. Supersmile is sold as a whitening gum. Trident White is the mainstream whitening gum most people have heard of. Minvelle is our own remineralizing gum and makes no whitening claim at all; it sits in the table so you can see what a published dose and a published certificate look like next to a proprietary blend. Every cell names its source, and "not published" means the brand's own pages do not state it, never that we assume it is absent.

Swipe sideways on mobile. Trident White figures come from our own review dated 22 August 2026; Minvelle figures from our transparency page. Prices move; the "Last reviewed" date is the date these were true.

The company

Who Supersmile is, and whether the gum is still sold

Supersmile is older than most of the brands this blog reviews. Its company page states that it was "Founded in 1987 by Dr. Irwin Smigel, World Renowned Father of Aesthetic Dentistry and his wife Lucia Smigel". The capitalised title is the brand's, not mine. The same page describes the range as "a clinically proven collection" of whitening and breath-freshening formulas. I quote that because it matters for the evidence section below: a brand that says clinically proven on its company page has set the bar it should be measured against, and the measuring tool is a search of the medical literature.

The founder is no longer alive. The brand's history page puts it this way: "While Dr. Smigel has since passed, his legacy is far from fading out." The page goes on to describe his founding of the American Society for Dental Aesthetics and a prize named after him. Nothing on the site names a current owner, a parent company or a legal entity. The Terms of Service page carries a footer reading "© Copyright 2010 Supersmile. All rights reserved." That is a stale year on a page that was live in September 2026, and it tells you the legal boilerplate has not been maintained. It does not tell you who owns the brand today, so this review does not claim to know.

Is the gum still sold? Yes. On 5 September 2026 the product page at supersmile.com, titled simply "teeth whitening gum" with the handle freshen-breath-teeth-whitening-gum-stain-removal-on-the-go, returned a normal response and listed the product with a price. The vendor field in the store's own product data reads Supersmile and the product type reads "On-The-Go". So the brand sells it direct, on its own store. A search-results pull the same day also surfaced other Supersmile items listed on QVC and on Amazon's live-shopping pages, so the brand has third-party distribution for parts of its range. The gum itself did not appear as a standalone 12-pack listing in an Amazon or Walmart search that day; only bundle kits containing floss or lip balm did. If you want the gum on its own, the brand's site was the one place we could confirm it.

One more absence worth stating. We could not confirm whether this gum carries the American Dental Association's Seal of Acceptance. The ADA's product search loads through a script that a plain page fetch cannot read, and a web search for the brand together with the ADA site returned nothing on 5 September 2026. The product page itself makes no Seal claim for the gum. So the honest entry is "not confirmed", not "no", and if the brand or the ADA publishes a listing we will update the line.

The label

Eight ingredients, read in order

The product page publishes the full list, which is more than several whitening gums manage. Here it is exactly as it appears on supersmile.com on 5 September 2026, including the brand's own spelling of the third item: "Xylitol, Gum Base, Natural Favors, Glycerin, Gum Arabic, Soy Lecithin, Beeswax, Calprox®." "Favors" is presumably a typo for flavors; I reproduce it because a verbatim list is the point of a label check, and because it tells you the page has not been proofread recently, which fits the 2010 copyright line.

Ingredient lists run by weight, heaviest first, so the order carries information. Xylitol sits at the top, which means it is the largest single component. The brand backs that with a number: "Sweetened with 65% Xylitol, and no other added sugars". Sixty-five percent is a high xylitol fraction for a gum; for reference, xylitol makes up 43 percent of a piece of our own gum, and the brands in our xylitol gum ranking span a wide range. What the Supersmile page does not give is a piece weight. Without it, 65 percent cannot be converted into milligrams per piece, and milligrams per piece is the number that lets you compare one gum with another or with the doses used in xylitol research. So the sweetener line reads: xylitol only, a high stated percentage, an unknown absolute amount.

Two things stand out once the list is laid out. First, the base is not itemised. "Gum Base" is a legal catch-all in most markets and tells you nothing about whether the chewable part is a synthetic polymer, a natural resin like chicle or mastic, or a blend. Most mainstream gums list it the same way, so this is normal rather than evasive, but it is a gap. Second, Calprox is the last ingredient. On a list ordered by weight, the last entry is the smallest, and the brand does not say how small. A proprietary blend at the bottom of a label is exactly the kind of line a reader cannot check, which is why the next section quotes the brand's description of it at length rather than paraphrasing.

For the allergy-minded: soy lecithin and beeswax are both on the list. Beeswax makes the gum not vegan by the usual definition. The page does not carry an allergen statement beyond the list itself, so I am reading these off the ingredients, not off a warning.

The mechanism

Calprox, in the brand's own words

Supersmile describes Calprox on at least three pages, and the descriptions agree with each other, which is worth noting because it is not always the case with proprietary blends. The gum's product page, fetched 5 September 2026, says: "This Xylitol-sweetened gum contains Calprox®, our proprietary formula of encapsulated calcium peroxide and minerals. This ingredient gently and effectively dissolves the sticky bio-film from teeth, helping to eliminate plaque, bacteria and stains without the risk of sensitivity." The same page adds, in its bullet list, "Dissolves surface stains from teeth without sensitivity" and "Makes smiles look shiny + new (even dentures, veneers, or bonded teeth!)".

The brand's dedicated Calprox page, fetched the same day, gives the composition a little differently: "Calprox® is a gentle blend of encapsulated calcium, phosphates, magnesium, and minerals that replicates the tooth enamel." It labels the ingredient "Proprietary to supersmile®." The company page repeats the "encapsulated calcium peroxide and minerals" wording and says the ingredient "dissolves the sticky film (protein pellicle) from teeth without the risk of sensitivity".

Put those together and the claim has a clear shape. Calprox is a calcium peroxide compound, encapsulated, carried with calcium, phosphate and magnesium minerals. The brand says it works by loosening the pellicle, the protein film that forms on teeth within minutes of cleaning and that surface stains bind to. Remove or loosen the film and the stain attached to it comes away. That is a surface-stain mechanism, and the brand is careful, on the pages we read, to say "surface stains". Nowhere does it say the gum changes the colour of the tooth underneath, and I found no statement that Calprox bleaches enamel or dentin. That restraint deserves credit. Plenty of whitening products blur the line between stain removal and bleaching; this page does not.

The chemistry is worth one paragraph because it separates Supersmile from the rest of the whitening-gum shelf. Calcium peroxide is a peroxide, which places Calprox in the oxidising family rather than the polishing family. Most gums that say whitening on the front have no oxidising ingredient at all; their effect, where it has been measured, comes from chewing and saliva, sometimes helped by a mild phosphate that competes with stain for the tooth surface. Supersmile's ingredient is, on paper, a different kind of thing. Whether the amount in one piece of gum does anything measurable is a separate question, and it is the question no published study answers.

What is missing is the number. No Supersmile page states how much Calprox a piece contains, how much calcium peroxide is inside the Calprox, or what the encapsulation is made of. The word "encapsulated" implies the peroxide is released on chewing, but the release profile is not described. A reader who wants to compare this gum with a peroxide strip, or with a phosphate gum in a trial, has nothing to compare. That is not unusual for a proprietary blend. It is still the gap that keeps this review from saying more than "the brand says".

The evidence

What PubMed holds on whitening gum, and what it holds on Calprox

Start with the direct question. On 5 September 2026 I searched PubMed for the term Calprox across all fields. It returned zero results. I also found no indexed clinical trial naming Supersmile or this gum. That means there is no third-party efficacy number for this product, in either direction. It does not mean the ingredient does nothing; absence of a trial is not a negative result. It does mean that every statement about what Calprox does comes from the company that sells it, and that a company page describing its range as "clinically proven" has not, as far as the public record shows, put this gum through a trial that anyone can read. So this review makes no study claim about Supersmile at all. The three studies below are about other gums, and they are here to show what the category can and cannot do.

Orbit White over 12 weeks: less new stain, not less old stain

The most useful whitening-gum trial in the literature is by Milleman and colleagues, published in the Journal of Clinical Dentistry in 2014 (PMID 26054175). It was a single-centre, examiner-blind, randomised crossover of 12 weeks in adults who form stain readily, meaning smokers and heavy coffee or tea drinkers. Starting from a stain-free baseline, they either chewed Orbit White four times a day for 15 minutes each alongside normal brushing, or brushed without gum, then swapped. After 12 weeks, the Lobene Stain Index showed 25 percent less new stain formation with the gum, and the Modified Lobene Stain Index showed 36 percent less. The authors' conclusion was that regular use of the gum soon after smoking or drinking coffee or tea supplements brushing in preventing new stain on the front teeth.

Read what that measures. The subjects started stain-free and the trial counted how much new stain built up. It is a prevention result, not a removal result, and it is a whitening gum from a different maker with a different formula. It does say something about the category: chewed after the staining drink, gum reduces the stain that would otherwise settle. It says nothing about Supersmile, and nothing about calcium peroxide.

Three sugar-free gums in two weeks: the base and the flavour did not matter

The second study, by Dodds and colleagues in the American Journal of Dentistry in December 2017 (PMID 29251453), set out to build a faster test for stain prevention. Twenty-five adults rinsed five times a day with freshly brewed black tea to force stain, then either chewed one of three sugar-free gums for 12 minutes or chewed nothing. It was a four-way crossover over two weeks each. All three gums cut new stain by 43 percent or more on the Modified Lobene Stain Index versus no gum, and two instrument methods agreed. The authors, who list Wrigley as their affiliation, add a line that matters for this review: a minor change to the gum base polymer, or a change of flavour, did not significantly change the stain-prevention result.

That last sentence is the honest ceiling for the word whitening on most gum packs. The stain-prevention effect belonged to the act of chewing a sugar-free gum after the tea, not to what the gum was made of. If you chew Supersmile after coffee you will very likely get the same benefit, because you will be chewing a sugar-free gum after coffee. What you cannot get from this study is any sign that a peroxide ingredient adds to it, because none of the three gums carried one.

A phosphate gum on stained pellets: an active can add something, in a lab set-up

The third study is the closest the literature comes to testing whether an added ingredient removes existing stain. Makino and colleagues, in Operative Dentistry in 2019 (PMID 31172873), ran a double-blind, placebo-controlled in situ study in 30 adults. Each person wore an appliance holding a hydroxyapatite pellet for two hours to let a pellicle form; the pellets were then soaked in coffee for 48 hours and their colour measured. The subjects then chewed two pieces of a gum containing 7.5 mg of sodium metaphosphate per piece, or the same gum without it, in five cycles of five minutes each. The phosphate gum removed measurably more coffee stain from the pellets than the control gum in every cycle after the first. The authors call sodium metaphosphate "a promising agent to be further explored".

Note the set-up. A pellet on an appliance is not a tooth, 48 hours of coffee soaking is not a year of mornings, and sodium metaphosphate is not calcium peroxide. What the study shows is that a named ingredient at a stated dose can do more than the plain gum in a controlled test. That is exactly the kind of evidence Supersmile could produce for Calprox, and exactly the kind that does not exist in the public record as of the search date.

So where does that leave the Supersmile claim?

In a reasonable place, if you read it at its own size. The brand claims surface-stain removal and a shinier look. The category evidence says sugar-free gum after coffee reduces new stain, and that an active at a known dose can lift some existing stain from a pellet. Supersmile's active has no dose and no trial. So the safest statement is: this gum will do what any sugar-free gum does after a staining drink, and it may do more, but nobody has measured the "more". If a reader needs their teeth to change shade, the honest answer for every gum on the market, ours included, is that a gum is the wrong tool, and a dentist is the right conversation.

The price

Twenty-nine cents a piece, and what that buys

The product page on 5 September 2026 listed one variant at $3.50 with a compare-at price of $5.00 struck through, and stated "1 Pack = 12 Pieces". That is $0.29 a piece at the selling price and $0.42 a piece at the compare-at price. Compare-at prices are set by the store and may or may not reflect a price the product has ever sold at, so I treat $3.50 as the price and $5.00 as decoration. Shipping is not included in either number, and on a $3.50 item the shipping charge can exceed the product; the page did not state a shipping cost on the fetch date, so I cannot compute a delivered price.

Against the rest of the shelf, 29 cents a piece is mid-priced for a specialist gum and expensive for a plain sugar-free gum. Trident White, in our review from 22 August 2026, was around nine dollars for a 144-piece multipack, which is about six cents a piece, the cheapest product in our review series. Supersmile costs roughly five times that per piece. Whether the difference is worth paying depends on whether you value the xylitol-only sweetener list and the named peroxide ingredient, because those are the two things the label offers that the Trident White label does not. Nothing in the published evidence tells you that either one produces a whiter result.

Against our own gum the comparison runs the other way, and I want to be plain that it is not a like-for-like. Minvelle is about €1.39 a piece at the single-box price and about €0.83 a piece on the two-box subscription at €29.99. That is far more than Supersmile, and the reason is a different product: a published 5.7 mg dose of nano-hydroxyapatite per piece with a batch certificate you can download, sold as a remineralizing gum with no whitening claim. If your goal is a cheap sugar-free gum to chew after coffee, Supersmile is the better buy of the two by a wide margin and I will say so without hedging. If your goal is a mineral dose you can check, Supersmile does not publish one and was never sold as that.

The reviews

Two star ratings on one page, and no readable reviews

Most brand reviews on this blog carry a section on what buyers say, with the themes attributed and dated. This one is shorter than usual, because the primary source did not give us the text. Here is what the page did give.

The product page's structured data, the machine-readable block that search engines read, states an aggregate rating of 4.9 out of 5 from 43 reviews. A review widget elsewhere on the same page, loaded through a metafield, shows 4.6 out of 5 from 997 ratings. Those two figures cannot both describe the same set of reviews of the same product. The likeliest explanation is a different counting basis, for example a store-wide total or a bundle listing feeding the widget, but the page does not say, and I will not pick one for the brand. Both numbers are the brand's own display, unaudited, reported here as displayed on 5 September 2026 and not endorsed.

The individual reviews themselves load through a client-side script. A plain fetch of the page returns the rating summary but not a single review body, so there was no text to read and no themes to summarise. I could have gone to a marketplace for review text, but the standalone 12-pack did not appear as its own listing in an Amazon or Walmart search on the fetch date; only bundle kits did, and bundle reviews describe the bundle. Rather than borrow reviews of a floss-and-lip-balm kit and present them as reviews of the gum, this section states that no review themes could be verified and leaves it there.

What a reader can do: open the product page in a normal browser, where the widget renders, and read the reviews directly. Sort by lowest rating first, which is where the useful information about any product lives, and look for repeated complaints rather than one-off ones. If you do that and find a consistent theme, tell me and I will add it here with the date.

Versus Trident White

Supersmile vs Trident White: the label fight

Trident White is the whitening gum most people can name, so it is the natural benchmark. Our Trident White review, last reviewed 22 August 2026, did the same label reading this page does, and the two labels turn out to be very different products wearing the same word on the front.

Sweeteners. The current US Trident White ingredient lists we found run sorbitol first, then maltitol and mannitol, with aspartame or sucralose depending on the flavour, plus acesulfame potassium, and no xylitol anywhere. Supersmile lists xylitol first and nothing else as a sweetener. If you buy gum for the xylitol, that is the whole decision, and Supersmile wins it outright. If you are indifferent to sweetener type, it is a wash.

The named active. Our review of Trident White found no distinct whitening ingredient on the current US lists; the sodium hexametaphosphate that older Trident White formulations were known for did not appear on the lists we found, and the product's whitening effect, where it exists, is the ordinary sugar-free-gum effect the two Wrigley-affiliated studies above describe. Supersmile names an active, Calprox, and describes its chemistry. That is more disclosure than Trident White offers. It is also, without a dose or a trial, a description rather than a proof.

The ADA Seal. Our Trident White review found that the ADA Seal people associate with Trident belongs to a different Trident line, not to White, and that no Seal covers any whitening claim. For Supersmile's gum, the Seal status is not confirmed either way. Neither product, then, can lean on the Seal for its whitening claim.

Price. About six cents a piece against about 29 cents. Trident White is roughly a fifth of the price. For a gum you chew several times a day, that gap adds up quickly.

The evidence. Neither product has a published trial on the finished gum that we could find. Trident White can point to the general sugar-free-gum stain-prevention literature, and so can Supersmile, because the effect belongs to the category. On what is written down and checkable, Supersmile publishes a cleaner sweetener list and a named ingredient, and charges five times as much for it. Trident White publishes a mainstream list and charges supermarket money. Which is better depends on whether the xylitol and the peroxide are worth 23 cents a piece to you, and the science cannot settle that, so your priorities have to.

Versus a hydroxyapatite gum

Supersmile vs Minvelle, with the conflict named

Disclosure first: Minvelle is my company, and this section compares a competitor's product with mine. Every fact about Supersmile above comes from Supersmile's own pages, quoted and dated, and every fact about Minvelle below comes from our transparency page, where you can check it. If the comparison reads as favourable to us, test it against the sources rather than taking my word.

These are different products with different jobs, and the honest version of this section starts there. Supersmile is a whitening gum whose mechanism is a peroxide compound working on surface stain. Minvelle is a remineralizing gum whose active is nano-hydroxyapatite, the calcium phosphate mineral enamel is made of, and it makes no whitening claim. Our transparency page says in as many words that we do not claim the gum whitens teeth. So there is no whitening contest here, and I am not going to invent one to win it.

Where the two can be compared is disclosure, because that is the standard this whole page runs on. Supersmile publishes a full eight-item ingredient list and a xylitol percentage, but no piece weight, no amount of its active, and no lab document. Minvelle publishes a 14-ingredient list by weight, a 1.9 g piece weight, 817 mg of xylitol and 285 mg of erythritol per piece, 5.7 mg of nano-hydroxyapatite per piece, a stated particle size, and a batch certificate of analysis and safety assessment as downloadable PDFs with one disclosed redaction, the manufacturer's name. On that axis, ours shows more. It also costs about five times as much per piece, and the price is on the same page as the dose.

On evidence, both products stand on category studies rather than on trials of the finished gum, and I hold ours to the same sentence I used for Supersmile. There is no published trial of Minvelle. The hydroxyapatite gum literature is two small studies. Porciani and colleagues, Journal of Clinical Dentistry 2014 (PMID 25122980), ran a clinical study of a chewing gum containing calcium hydroxyapatite with dentin hypersensitivity as the outcome. Hassani and colleagues, Journal of the Mechanical Behavior of Biomedical Materials, December 2023 (PMID 37852085), ran a single-blind in situ study of hydroxyapatite nanoparticle gums with enamel mineral content as the outcome. Neither measured whitening, neither measured cavities, and neither used our product. Our ranking of 14 remineralizing gums walks through both in detail and says the same thing there.

So the fair summary: if you want a cheap xylitol gum with a named stain-control ingredient, buy Supersmile and do not think about ours. If you want a gum with a published mineral dose and a certificate behind it, and you accept that the evidence for the category is early and that it is a complement to fluoride brushing rather than a replacement, that is what we sell. Both brands should be held to the same question, which is "show me the number", and on the fetch date only one of the two answered it.

Who it suits

Who should buy Supersmile gum, and who should skip it

Buy it if you want a xylitol-only gum from a long-standing brand, you chew after coffee or tea and want the stain-prevention effect the category evidence supports, and 29 cents a piece is fine with you. The short ingredient list is a genuine plus, and the brand's restraint in claiming only surface-stain removal is another.

Skip it if you are buying for a whiter shade rather than for stain control, because no gum does that and this one does not claim to. Skip it if you need a per-piece xylitol dose for a specific reason, because the page does not publish a piece weight and so cannot give you one; the brands in our Epic Dental review and our Spry review are the ones to read if the milligram matters. Skip it if you avoid soy or beeswax, both of which are on the list. And skip it if you were hoping for a published trial, because there is none, for this gum or for its competitors.

Whatever you buy, chew after the staining drink rather than before, because both stain trials above timed the gum after the coffee or tea, and keep brushing with fluoride, because no gum in this category replaces it.

Fairness

What is fair to Supersmile, and how to check me

Supersmile is a real brand, nearly forty years old, still trading direct to consumers on 5 September 2026, founded by a dentist whose name carries weight in cosmetic dentistry and who has since died. The brand publishes a full ingredient list for this gum, which several competitors do not. It describes its proprietary ingredient consistently across three pages, which is better than the shifting descriptions I have found elsewhere. And its whitening claim on the pages we read stops at surface stain, which is the accurate place to stop.

The gaps this review names are gaps in publication, not findings against the product. No PubMed record for Calprox means no peer-reviewed trial of the ingredient or the gum was found indexed on the search date. It does not show the ingredient is ineffective, and it does not show the opposite either; it shows that no third-party number exists to cite. The two star ratings on the page are the brand's own and unaudited, reported as displayed and not endorsed in either direction. The 2010 copyright line and the "Favors" spelling are signs of an unmaintained page, not of anything more. If Supersmile publishes a dose, a trial, or a reconciliation of its ratings, this page will carry it with the date.

Now the other side. I sell a competing gum. Every negative fact on this page is attributed to a Supersmile page and dated, and I have used no verdict word about the company, and if you find one, tell me and it comes out. Hold us to the same standard: the dose, the piece weight, the certificate and the ingredient list are on our transparency page, and the studies we cite carry PubMed numbers in the sources block below that you can open. If our pages fail the test this review applies to Supersmile, I want to hear it at max@minvelle.com.

All facts on this page are current as of the fetch dates cited, which is 5 September 2026 unless stated otherwise. Brands change formulas, prices and pages without notice. Re-check any figure against Supersmile's live pages before relying on it after that date. The "Last reviewed" line at the top of this page is the date it was last true to my knowledge.

FAQ

Questions people ask about Supersmile gum