DiamondSmile Review: A $99 LED Teeth Whitening Kit, Its 'FBA Approved' Claim and 35% Peroxide Refills

Our verdict

No for most people. DiamondSmile is a blue LED mouth tray sold with whitening pens, and peroxide gel can genuinely whiten teeth. But the page's "FBA Approved" badge is not a regulator's approval, the gel strength in the kit is not stated, and the refill pens are 35% carbamide peroxide, far stronger than the 10% gels that have carried the ADA Seal. The LED adds little, and the Laughland kit, which we scored higher, costs $39.99. DiamondSmile scores 3.3 out of 10, held back by misleading claims and missing safety detail.

The short version

• What it is: a USB-powered blue LED mouth tray with peroxide whitening pens.
• Price: $99 for one kit on 4 October 2026, with a five-pack for $297 preselected. Delivery was listed as free.
• Best trait: pens make it easy to apply gel, and peroxide does whiten teeth.
• Biggest drawback: a misleading approval badge, unstated gel strength and strong refills.
• Our score: 3.3 out of 10.

Pros & cons

The pros come from what peroxide whitening can do. The cons are about claims, gel strength, safety and price.

How it works

At-home whitening kits like DiamondSmile have two parts: a peroxide gel that bleaches stains, and a blue LED mouth tray that is said to speed the process. You paint the gel onto your teeth with a pen, put the tray in your mouth and switch on the light for a set time. Over several days, the peroxide breaks down stain molecules inside the enamel, which lightens the teeth.

The product photo shows a black "Diamond Smile" box containing a clear U-shaped mouth tray with a small control unit and cable, and three white pens labelled Diamond Smile. According to the page, the tray has 16 blue LEDs, whitens teeth in 10 minutes, needs no batteries, connects to iPhone, Android and any USB port, and is "FBA approved".

1. 01

   Paint on the gel

   Step 1: Dry your teeth, twist the whitening pen and brush a thin layer of gel onto the front of each tooth, keeping it off your gums.

2. 02

   Fit the LED tray

   Step 2: Plug the tray into your phone or a USB port, place it in your mouth and switch on the blue light for the session time in the instructions.

3. 03

   Rinse and repeat

   Step 3: Remove the tray, rinse your mouth and the tray, and repeat daily for the number of days the instructions give, stopping if your teeth or gums become sore.

What actually whitens teeth

Hydrogen peroxide and carbamide peroxide are the active ingredients in nearly all bleaching whiteners. Carbamide peroxide breaks down into hydrogen peroxide and urea; 10% carbamide peroxide releases about 3.5% hydrogen peroxide, and 35% releases about 12%. The peroxide moves into the enamel and breaks apart the molecules that cause stains. Stronger gels work faster, but cause more sensitivity and gum irritation.

What the blue light does

LED lights in whitening kits are said to speed up the breakdown of peroxide. Research on in-office lights has found mixed results, and at-home LEDs are weaker. A clinical study in the Open Dentistry Journal of LED-assisted bleaching with 35% carbamide peroxide found low sensitivity scores overall, with a slight increase after the LED stage. Most dental bodies treat the gel as the active part and the light as an extra.

Why results fade

After whitening, teeth slowly pick up new stains from food, drink and smoking. Some of the early brightness also comes from teeth drying out during treatment, which reverses within a day or two. Most people find the lasting result is a little less dramatic than the first-day look.

Phone and USB power

The tray plugs into a phone or USB port, which means no batteries. It also means you sit near a phone or computer, or hold your phone, while it runs. The page does not say which connectors or adapters come in the box.

Why some teeth whiten better than others

Yellow and light brown stains from food and drink usually respond best. Grey teeth, often caused by certain antibiotics taken in childhood, respond slowly and unevenly. A single dark tooth may be a sign of a nerve problem and needs a dentist's check, not bleaching.

What the tray does

The tray holds the LEDs close to the front teeth and keeps your lips away from the gel. Unlike a dentist's custom tray, it does not hold gel against your teeth in a shaped reservoir; the gel is painted on with the pen. That makes coverage depend on how carefully you paint.

Session length and frequency

Most LED kits suggest a short daily session for one to two weeks. Strong gels need fewer and shorter sessions. The DiamondSmile page gives "10 minutes" but no schedule. The instructions in the box should give one; if they do not, ask support before starting.

Who it's for

DiamondSmile suits adults with healthy teeth and gums who want to lighten stains from coffee, tea, wine or ageing, and who have checked with a dentist that home whitening is right for them. It does not suit people with sensitive teeth, gum disease, untreated decay or worn enamel, anyone pregnant or under 18, or people whose front teeth have crowns, veneers or fillings, which will not whiten.

• Adults with healthy teeth and gums who want to lighten stains at home
• Coffee, tea and wine drinkers with surface staining
• People who have checked with a dentist that home whitening suits them

Why DiamondSmile appeals

A whiter smile is one of the most popular cosmetic changes, and in-office whitening can cost hundreds of dollars. A kit that promises results in ten minutes, runs from your phone and comes in a sleek black box looks like a professional treatment at home. The "FBA Approved" badge adds a sense of official backing, which is exactly why it matters that it is not a regulator's approval.

People who want a gradual change

Some people prefer a subtle lift rather than a dramatic change. Shorter sessions spread over more days, with a lower-strength gel, give more control. Using a shade guide lets you stop when you reach the shade you want.

Coffee, tea and wine drinkers

Surface and deeper stains from dark drinks usually respond well to peroxide whitening. Results often show within one to two weeks of daily use. Without changing habits, stains return over months, so most people need top-up treatments.

People with yellowing from age

Teeth naturally darken with age as enamel thins and the yellower dentine shows through. Peroxide can lighten this to a degree. Grey or brown discolouration from medicines or injury often responds poorly to home kits.

People with crowded or crooked teeth

Painting gel onto overlapping teeth evenly is harder, and the LED tray may not sit close to every tooth. Results may be patchy. A dentist's custom tray fits crowded teeth better.

Brides, grooms and special occasions

People often whiten before a wedding or event. Start several weeks ahead, test for sensitivity first and avoid starting in the final days, in case of irritation. A dentist can advise on the safest timeline.

Smokers

Tobacco stains can be stubborn and return quickly if smoking continues. Whitening may help a little, but stopping smoking does more for both teeth and gums. Smokers are also at higher risk of gum disease, so a dental check first matters more.

People with fillings or bonding on front teeth

Tooth-coloured fillings and bonding do not whiten. After whitening, they may look darker than the surrounding teeth and need replacing to match. Plan this with a dentist before you start.

People who already whitened recently

Whitening too often can cause sensitivity and a chalky look. If you whitened in the past few months, wait and see whether a top-up is really needed.

People who want quick results before an event

If you want a noticeable change within days, a dentist's in-office whitening is faster and more controlled. Starting a strong home kit right before an event risks sensitivity or irritated gums on the day.

Who should skip it

Skip DiamondSmile if you have sensitive teeth, gum disease, untreated cavities, cracks or worn enamel, because peroxide can make these worse. Skip it if you are pregnant, breastfeeding or under 18. Skip it if your front teeth have crowns, veneers or large fillings, since these will not whiten and may end up a different shade. And skip it if you want a kit with a stated gel strength and a dental association seal.

• Anyone with sensitive teeth, gum disease, untreated decay or worn enamel
• Pregnant or breastfeeding people, and anyone under 18
• People with crowns, veneers or fillings on front teeth, which will not whiten
• Buyers who want a kit with a stated gel strength and dental association seal

Is DiamondSmile approved, and are its claims true?

No regulator has approved it, and several claims overstate what it does. "FBA Approved" is not a regulatory approval; FBA usually stands for Fulfilment by Amazon, a shipping service. There is no FDA approval for whitening kits. "White teeth in 10 minutes" overstates what a single session does. "Whiter, healthier teeth" is half true: peroxide can whiten, but does not make teeth healthier. The gel strength in the kit is not stated.

"FBA Approved"

The page describes DiamondSmile as "Smart Whitening Teeth Technology" and adds "FBA Approved". FBA is not a health or safety regulator. In e-commerce, it most often means Fulfilment by Amazon, a service in which Amazon stores and ships sellers' goods. Readers could easily mistake it for "FDA approved", which it is not.

Truth in Advertising, which has reported on several whitening brands, points out in its article on FDA claims by whitening sellers that there is no such thing as an FDA-approved teeth whitening kit. Whitening kits are not subject to that kind of review.

What this means for you: do not treat the badge as a sign of safety testing.

Why "approved" claims are common

Whitening sellers often use badges and logos that suggest official backing: FDA logos, "dentist approved" seals and words like "certified". Truth in Advertising has reported on several brands for misusing the FDA logo. A genuine endorsement usually names the organisation and can be checked on its website.

"White Teeth in 10 Minutes"

A single session may brighten teeth slightly, often because they dehydrate during treatment, which makes them look whiter for a few hours. Lasting results usually take daily sessions over one to two weeks. Ten minutes describes one session, not the result.

"Whiter, Healthier Teeth With Long-Lasting Result"

Peroxide whitening is cosmetic. It does not make teeth healthier, and overuse can make them sensitive. Results typically last months, depending on diet, smoking and oral hygiene.

"16 Powerful LED Blue Lights"

The number of LEDs says little about effect. The evidence that at-home blue light adds much to peroxide gel is weak. The gel does most of the work.

"Mobile Blue LED Teeth Whitening Kit - No Batteries Required"

The tray draws power from a phone or USB port. That is convenient, but you need a phone or computer nearby, and the page does not list which adapters are included.

The gel strength

The page never states what is in the pens that come with the kit. The refill pens sold as an add-on contain 35% carbamide peroxide. The US Air Force dental service's whitening update notes that products carrying the ADA Seal have contained 10% carbamide peroxide, and that the most common side effects are tooth sensitivity and gum irritation. In the European Union, products releasing more than 0.1% hydrogen peroxide cannot be sold directly to consumers, and those up to 6% are restricted to dental supervision. A 35% carbamide gel releases about 12% hydrogen peroxide.

What to do: ask support for the exact strength of the gel in the kit before ordering. If they will not say, do not use it without a dentist's advice.

Why strength matters so much

The difference between 10% and 35% carbamide peroxide is large. Higher strength works faster but raises the chance of sensitivity, gum irritation and uneven results, especially without a custom tray. Dentists sometimes use strong gels in short, supervised sessions. For unsupervised home use, lower strengths with longer courses are usually considered safer.

Rules in other countries

Teeth whitening rules vary widely. In the UK and EU, products sold directly to consumers can contain only tiny amounts of hydrogen peroxide; stronger products are restricted to dentists. In the US, over-the-counter whitening is less restricted. If you live outside the US, a kit with 35% carbamide peroxide refills may not meet local rules.

The GlorySmile branding

The refill pen photo shows a black box and pens printed with "GlorySmile", a different name from DiamondSmile. Whitening kits are often made by one factory and sold under many names. It does not prove the kit is unsafe, but it means you cannot be sure who made the gel.

How much does DiamondSmile cost, and what is sold separately?

With the United States selected on 4 October 2026, one DiamondSmile kit cost $99, two cost $159, three cost $197, four cost $249 and five cost $297, with the five-pack preselected. Delivery was listed as free. A 3-year warranty cost $24, three 35% carbamide peroxide refill pens $29, a SonicX PRO toothbrush $49 and a 3D shade guide $9. We scored the Laughland LED kit 5.6 out of 10 at $39.99.

DiamondSmile price and bundles

The crossed-out "regular" price is $198, twice the single price, and the $99 is described as a 50% discount. We found no evidence of anyone paying $198.

The add-ons

• 3 teeth-whitening refill pens, $29 (old price $49): 35% carbamide peroxide pens that break down surface stains from coffee, tobacco and wine.
• SonicX PRO toothbrush, $49 (old price $99): the sonic toothbrush from the same seller.
• 3D teeth shade guide, $9 (old price $19): a printed guide with 20 tooth shades for tracking progress.

The toothbrush offer

SonicX PRO costs $89 on its own page, so $49 here is cheaper. Our SonicX PRO review found a sonic brush with a timer and four modes, an unsupported "100X" claim and a head photo that appears to show Philips Sonicare heads. A good toothbrush matters more for your teeth than whitening, but a branded sonic brush has been listed for less.

The shade guide

A shade guide helps you track progress honestly, since people often misjudge changes in their own teeth. The photo shows a printed guide with 20 shades. Dentists use physical shade tabs in better light. It is a reasonable $9 extra if you want to measure results.

Total cost with extras

One kit with the refills, shade guide and warranty comes to $161. A course of whitening with a dentist's take-home trays and gel may cost more, but includes an examination and supervision.

What other kits cost

Our Laughland review scored that LED whitening kit 5.6 out of 10 at $39.99. Our PurelyWHITE Deluxe review scored a peroxide-free PAP whitening powder 5.6 at $29.99. Pharmacy whitening strips are another familiar option, sold in many concentrations.

Running costs

If you use the refills, three pens at $29 may last one or two courses depending on how many sessions you do. Over a year, top-up treatments add up. Pharmacy strips or dentist-supplied gels may cost less per course.

The "50% discount"

The crossed-out prices on the kit and add-ons are about twice the selling prices, a pattern across this seller's products. Treat them as reference prices set by the seller, not evidence of real savings.

Who sells it

The seller is G Com Pte Ltd, listed at 137 Market Street, #04-01 Grace Global Raffles, Singapore 048943, with a support email and phone number. The page footer reads "G Com Pte Ltd - Hong Kong". Your card statement will show "drone720x.com".

Is DiamondSmile better than Laughland, whitening strips or a dentist?

No. Laughland is a similar LED kit that we scored 5.6 at $39.99. Pharmacy strips state their peroxide strength and are widely available. Dentist-supervised whitening uses custom trays and checks your teeth first, which is safest for strong gels. DiamondSmile costs more than Laughland, does not state its gel strength and leans on a misleading approval badge.

DiamondSmile vs Laughland

Both use a blue LED tray with gel. Laughland costs well under half the price and scored higher in our review, mainly because independent testers saw visible results and the brand says what type of gel it uses. If you want an LED kit, Laughland is the better-value starting point.

What Laughland does differently

In our Laughland review, the brand said its gels use hydrogen peroxide at moderate strengths, and independent testers saw visible whitening with low sensitivity. Laughland overstates some claims too, and buyers report surprise subscriptions, so read its checkout carefully. Its test results and much lower price are why it scored higher. Neither kit removes the need to check with a dentist first.

DiamondSmile vs whitening strips

Strips are thin plastic films coated with peroxide gel. They are easy to use, sold by known brands and state their strength. They do not need a light. For many people, they are the simplest home option.

Whitening toothpastes

Whitening toothpastes mostly remove surface stains with mild abrasives or low amounts of peroxide. They help maintain results but change the natural shade very little. Using one after a whitening course can help results last longer.

DiamondSmile vs PAP whitening

PAP (phthalimidoperoxycaproic acid) products are marketed as peroxide-free, gentler options. They mainly remove surface stains and work more slowly. Our PurelyWHITE Deluxe review covers one.

DiamondSmile vs a dentist

A dentist checks for decay, gum disease and cracks before whitening, makes trays that fit your teeth and chooses a gel strength that suits you. That reduces sensitivity and gum burns. It costs more, but for strong peroxide, it is the safest route.

DiamondSmile vs veneers

Veneers cover the front of teeth and can change colour and shape, but involve removing some enamel and cost much more. Snap-on veneers are a removable cosmetic alternative; our Shiny Smile Veneers review looks at one.

DiamondSmile vs in-office whitening

In-office whitening uses strong gels under a dentist's control, with gum protection, and gives faster results in one visit. It costs the most. For people who want quick, safe results before an event, it is often the best choice.

What the comparison shows

The gel is what whitens teeth, and the safest gel is one whose strength you know and that suits your teeth. Cheaper kits, strips and dentist options all state that clearly. DiamondSmile does not, which is the main reason it falls behind.

When DiamondSmile could still make sense

If support confirms a moderate gel strength, your dentist approves, and you prefer this kit, it could whiten your teeth. It still costs more than a similar kit we rated higher.

Is DiamondSmile legit, and what should you check before buying?

DiamondSmile is a real kit sold by G Com Pte Ltd, which lists a Singapore address and support contacts. The concerns are an "FBA Approved" badge that is not a regulator's approval, an unstated gel strength, 35% peroxide refills, refill photos branded GlorySmile, the preselected five-pack and refund terms that need a returns number and leave return postage to you. Because whitening involves a strong chemical in your mouth, safety checks come first.

See a dentist first

What to do: ask your dentist whether whitening suits your teeth and gums, and what strength they recommend.

Ask for the gel strength

What to do: ask support what concentration of hydrogen or carbamide peroxide the included pens contain, and ask for an ingredients list.

Ask where it is made

What to do: ask support where the gel is made and who makes it. A clear answer helps you judge quality, especially given the GlorySmile branding on the refill photo.

Ask about ingredients

What to do: ask for a full ingredients list for the gel. Some gels contain flavourings or other ingredients you may react to. If you have allergies, show the list to your dentist or pharmacist.

Ask about the instructions

What to do: ask support for the full instructions before ordering, including session length, number of days and how often to repeat. A kit without clear instructions is harder to use safely.

Ask about adapters

What to do: ask which phone connectors come in the box, so the tray works with your phone.

Check the warranty offer

The $24 three-year warranty is offered at checkout. For a kit whose main part, the gel, is used up within weeks, a long warranty mostly covers the LED tray. Ask what it covers before paying.

Think about the toothbrush add-on

The $49 SonicX PRO toothbrush is offered with the kit. A good toothbrush matters, but you do not need to buy it here. Compare it with branded sonic brushes first.

Check the selected bundle

The five-pack for $297 is preselected. Change it to one kit.

Refunds and returns

The page code mentions a 30-day guarantee "less S&H". The terms cover defective or damaged items within two years, with a returns number needed first. Return postage is at your cost, and parcels with insufficient postage are refused. Opened whitening gel may not be accepted back.

Membership offers

The page code contains text for a "Gadget Discount Club", free for 30 days, after which "$9 may apply". We did not see it on the order page with the United States selected. Check your order email and card statement.

Timers, pop-ups and the spin wheel

The page shows a 30-minute countdown, "just bought" pop-ups and a discount spin wheel. They do not affect the product.

Check the expiry date

Peroxide breaks down over time, so whitening gels have expiry dates. Check the pens for a date when the kit arrives. Store them in a cool, dry place away from sunlight.

Keep it away from children

Whitening gel is not safe for children to swallow. Store the kit out of reach.

How to buy DiamondSmile the smart way

1. See a dentist and confirm home whitening suits you.
2. Ask support for the gel strength in the kit.
3. Open the DiamondSmile order page (opens G Com Pte Ltd in a new tab) and select your country.
4. Change the preselected five-pack to one kit.
5. Skip the refills until you know how your teeth react.
6. Note the card statement name, drone720x.com, and save your order email.

How did we score DiamondSmile?

DiamondSmile scores 3.3 out of 10: claim accuracy 0.4, build durability 0.8, price competitiveness 0.5, usability 1.1 and owner satisfaction 0.5, each out of 2. Peroxide whitening works, and pens are easy to use. But the page uses a misleading "FBA Approved" badge, overstates speed and health benefits, leaves the gel strength unstated, sells strong refills and costs more than a similar kit we rated higher.

What owners say

We found no Trustpilot profile for the gadgetxaura.com store and no independent retailer ratings for DiamondSmile. The pages that rank for it are mostly promotional. Users of at-home LED kits commonly report some whitening over one to two weeks, along with tooth sensitivity, gum irritation where gel touched the gums and uneven results on teeth with fillings.

How the score breaks down

We use the five criteria on our how we test page, each out of 2.

What we did, and did not, do

Nobody on our team has used DiamondSmile. We read the offer page our link opens with the United States selected, its code and the seller's terms on 4 October 2026, along with Truth in Advertising's whitening report, the US Air Force dental whitening update, the Open Dentistry Journal LED study and the top-ranking DiamondSmile pages. Our dental care hub lists the other dental products we have reviewed.

How to use DiamondSmile safely

Check with a dentist first, then brush and dry your teeth, paint a thin layer of gel onto the front of each tooth, keeping it off your gums, and fit the LED tray for the time in the instructions. Rinse afterwards, start with short sessions every other day, and stop if teeth ache or gums turn white or sore. Avoid dark drinks for a few hours after each session.

1. See a dentist. Rule out decay, cracks and gum disease.
2. Brush first. Brush gently and dry your teeth with tissue.
3. Paint thinly. A thin layer on the front surfaces only.
4. Keep gel off gums. Wipe off any that touches them.
5. Fit the tray. Switch on and keep still for the set time.
6. Rinse well. Rinse your mouth and the tray.
7. Go gently. Start with shorter or fewer sessions.

Before you start

Have a dental check-up and clean if you are due one. Whitening works better on clean teeth, and a dentist can spot problems that peroxide would aggravate. Take a photo of your teeth in daylight and note your shade on the guide, so you can judge progress fairly.

Painting the gel

Twist the pen until a small amount of gel appears on the brush tip. Paint a thin, even layer on the front of each visible tooth, from the gum line down, without touching the gums. A thick layer does not work faster and is more likely to spread.

Using the light

Keep your mouth relaxed around the tray and breathe through your nose. Do not bite down hard. If your phone runs the tray, keep it on a table rather than holding it, so you can sit still.

Managing sensitivity

Sensitivity usually appears as short, sharp twinges. Using a sensitive toothpaste for two weeks before and during whitening helps. Spacing sessions out, shortening them or stopping for a few days usually settles it. If pain persists, stop and see your dentist.

Sensitivity toothpaste

Toothpastes for sensitive teeth, containing potassium nitrate or stannous fluoride, can reduce whitening sensitivity when used for a couple of weeks before and during treatment. Brush with one twice a day and leave it on your teeth rather than rinsing.

Protecting your gums

Peroxide on gums can cause temporary white patches and soreness. Paint carefully, wipe away excess and do not overfill. If gums burn, rinse with water and stop for the day.

How many sessions

Follow the instructions in the box, but listen to your teeth. Many people see the most change in the first week. If your teeth reach the shade you want early, stop. More sessions after that add sensitivity without much extra whitening.

Cleaning the tray

Rinse the tray in cool water after each use and let it air dry. Do not use hot water or harsh cleaners, which can damage it, and keep the electronics and cable dry.

After each session

Avoid coffee, tea, red wine, curry and smoking for a few hours, since teeth absorb stains more easily right after whitening.

Spacing sessions

If your teeth feel sensitive after a session, wait a day or two before the next one. Alternating days often gives similar results with less discomfort, and you can always add sessions later. Short breaks do not undo progress.

Tracking your results

Use the shade guide or photos taken in the same light each week. Teeth may look whiter straight after a session because they dehydrate; judge results a day later.

Using the shade guide well

Compare your teeth with the guide in daylight, near a window, without makeup or bright lipstick nearby, which change how teeth look. Check the same tooth each time, usually an upper front tooth.

Storing the kit

Keep the pens capped, upright and away from heat and sunlight, which break down peroxide. Store the tray clean and dry in its box, away from children and pets.

Keeping results

Brush twice a day, rinse after dark drinks and consider occasional top-ups only after checking with a dentist. Over-whitening can make teeth look chalky or translucent.

Diet during whitening

Some people follow a "white diet" during a whitening course, avoiding coloured foods and drinks. There is limited evidence for strict rules, but avoiding coffee, tea, red wine and smoking for a few hours after each session is sensible.

If something goes wrong

If gel causes white, painful patches on your gums, rinse well and stop. If tooth pain lasts more than a day or two after stopping, or you notice a cracked or chipped tooth, see a dentist.

Other questions about LED whitening kits

Can I whiten crowns or veneers? No. Peroxide only works on natural tooth.

How long do results last? Typically several months, depending on diet and smoking.

Can I use the kit every day? Follow the instructions and your dentist's advice; strong gels usually need fewer, shorter sessions.

Is the blue light harmful? At-home LED trays are low power. Do not stare into the light.

More questions about teeth whitening

Does whitening damage enamel? Used as directed, peroxide whitening is not thought to damage healthy enamel significantly. Overuse, strong gels and acidic products raise the risk of sensitivity and surface changes.

Can I whiten with sensitive teeth? Talk to a dentist first. They may suggest a lower-strength gel, shorter sessions or a sensitivity toothpaste beforehand.

Why are my teeth patchy after whitening? White spots can appear temporarily as teeth dehydrate, and usually fade within a day or two. Patchy results can also come from uneven gel or existing enamel marks.

Is charcoal toothpaste a good alternative? Charcoal products are abrasive and lack good evidence for whitening. Dental bodies generally do not recommend them.

Frequently asked questions