Product Review · Oral Health & Sleep
Reviv Mouth Guard Review (2026): Can a Night Guard Do More Than Protect Your Teeth?
By the Your Supplement Digest Editorial Team · Updated October 23, 2026 · Based on official product information and published research
The Reviv mouth guard is a soft, flat night guard that sits between your upper and lower teeth while you sleep. Like any night guard, it cushions the teeth against clenching and grinding. What sets Reviv apart is its slightly thick, flat-plane design, which the brand says gently props the jaw open and stretches the surrounding soft tissue over time.
In this Reviv mouth guard review, we look at how it works, the R1 and R2 models, sizing, what research says about night guards, pricing, the refund terms, and the safety points worth knowing before you order.
Quick facts
- ✔︎ Soft night guard worn while you sleep
- ✔︎ Two models: R1 (entry) and R2 (durable)
- ✔︎ Two sizes per model, chosen by bite width
- ✔︎ Food-grade material; ready to wear
- ✔︎ One-time purchase, sold as final sale*
From $100 for the R1 on the official order page.
*Per the official order page, product pages and refund policy. The brand states R1 is BPA-, latex-, phthalate- and PVC-free, and that R2 carries a 1-year replacement guarantee.
Reviv at a Glance
Reviv is a ready-to-wear sleep mouth guard sold in two models, built around the brand’s idea that keeping the jaw slightly open at night can do more than protect the teeth.
Format
Soft, flat-plane guard worn overnight, plus optional short daytime sessions
Models & sizes
R1 (Small or Large) and R2 (Medium or Large), picked by measuring your bite width
Designed for
Adults who clench or grind at night and want an affordable, ready-to-wear guard
Guarantee & options
One-time purchase, final sale. R2 includes a 1-year replacement guarantee, per the brand
✔︎ Food-Grade Material
✔︎ BPA-, Latex- & PVC-Free (R1)
✔︎ Flat-Plane Design
✔︎ Two Sizes Per Model
✔︎ 1-Year Replacement on R2*
What Is the Reviv Mouth Guard?
Reviv is an over-the-counter oral appliance from EGK, Inc., a company based in Delaware. It’s a one-piece guard you place in your mouth at bedtime, with no impressions, lab work or dental visit needed to order. The brand sells two main nighttime versions, R1 and R2, each in two sizes.
The brand’s core idea goes well beyond tooth protection. It compares the soft tissue around the skull to a balloon and argues that grinding the teeth down slowly lets that balloon “deflate.” By adding height between the teeth, the brand says Reviv works “like a doorstop that prevents the jaw from closing,” stretching soft tissue so the jaw and face can move toward better alignment. That theory is the brand’s own, and we couldn’t find published clinical trials testing it. What is well established is that mouth guards and splints are a standard way to protect teeth from grinding, as the Mayo Clinic explains.
Reviv is sold as a consumer product, not a prescription device. The brand’s product terms state that it makes no claims to diagnose, treat, cure or prevent any disease, and that results vary from person to person.
Who Is Reviv Best For?
- ✔︎ Adults who clench or grind at night and want a simple, affordable guard they can start using right away
- ✔︎ People who wake up with a tight, tired jaw and want a cushioned barrier between their teeth
- ✔︎ Moderate to heavy grinders who want a longer-lasting option (the R2)
- ✔︎ First-time night guard users who want a low-cost way to test the concept (the R1)
- ✔︎ Anyone curious about the brand’s jaw-opening approach who’s happy to ease in gradually
- ✔︎ People who are comfortable keeping their dentist in the loop during long-term use
Talk to a dentist first if you have loose teeth, braces, gum disease, crowns, veneers or bridges, a diagnosed TMJ disorder, or loud snoring that could point to sleep apnea. Children should only use it with a dentist’s or orthodontist’s guidance.
Does the Reviv Mouth Guard Actually Work?
The fair answer depends on what you want it to do. For protecting your teeth from nighttime grinding, Reviv sits in a well-established category. For the brand’s bigger claims about facial structure, energy and aging, the evidence isn’t there yet.
The strong part: tooth protection
Mouth guards are one of the most common recommendations for bruxism (teeth grinding and clenching). MedlinePlus notes that a splint may help protect your teeth from the pressure of grinding. The NIH’s National Institute of Dental and Craniofacial Research says a mouth guard separates the teeth, which prevents tooth damage and may reduce muscle activity from clenching (NIDCR).
Many reviewers on the brand’s store describe less morning jaw tension and a more relaxed jaw, which fits with that basic cushioning role.
The important caveat
Guards protect teeth, but research hasn’t shown that they stop grinding itself. A Cochrane review concluded there isn’t enough evidence that occlusal splints are effective for treating sleep bruxism, and a larger NIHR-funded systematic review found insufficient evidence on whether splints reduce tooth wear. Those studies mostly looked at dentist-made splints, not Reviv specifically.
Reviv also works differently from a typical guard. Its own product terms say the process may create a posterior open bite over time, where the back teeth no longer touch when you bite down. That’s a lasting bite change, which is why we recommend involving your dentist (more in the safety section).
The rest of the claims
The brand’s pages connect its method to posture, focus, mood, appearance and even “the root cause of almost all disease.” It frames these as hypotheses, and we found no published clinical trials testing them, so we treat them as the brand’s beliefs rather than proven benefits. Customer stories about jaw shape or facial changes are vendor-published and not independently verified.
Put simply: Reviv is a comfortable, affordable way to cushion your teeth at night, with a bolder theory layered on top. The evidence is stronger for what night guards do in general than for the brand’s own long-term claims, and individual results vary.
What's Inside the Box? Reviv Design and Models
Reviv has no ingredients, so here’s how the appliance itself is built. Helpfully, the brand publishes exact dimensions for every size, which makes it easier to compare than many mouth guards.
Material
Food-grade silicone and TPE
The order page describes the guard as 100% food-grade silicone. The brand’s R1 page lists food-grade TPE that’s BPA-free, latex-free, phthalate-free and PVC-free, and its R2 page describes premium soft silicone.
Design
Flat-plane bite surface
Instead of locking your teeth into grooves, the flat surface gives the jaw stable vertical support while letting it rest naturally, according to the brand. This is the “doorstop” effect behind the method.
Breathing
Built-in air holes
Both models have air holes. The brand says the R2’s smaller holes encourage nose breathing, while the R1’s medium holes allow a little more airflow.
Entry model
R1 (RevivOne)
The lightest, most budget-friendly option, aimed at first-time users and light grinding. Sizes: Small (4.7 × 6.0 × 2.5 cm) and Large (5.0 × 6.7 × 3.0 cm). The brand says its softer material lasts about 2–4 months.
Durable model
R2 (RevivTwo)
Built for moderate to heavy grinders and longer-term use, and described as gentler on the gums. Sizes: Medium (46 × 63 × 25 mm) and Large (54 × 74 × 30 mm). The brand rates it for 12+ months with a 1-year replacement guarantee.
Reviv Key Features
✔︎ Flat-plane design that props the jaw slightly open
✔︎ Ready to wear: just rinse it first
✔︎ Two nighttime models, R1 and R2
✔︎ Two sizes per model, chosen by bite width
✔︎ Food-grade material; R1 is BPA-, latex- and PVC-free
✔︎ Air holes to support breathing
✔︎ R2 built for heavier grinders, 12+ months per the brand
✔︎ 1-year replacement guarantee on R2
✔︎ Ships within about 48 hours with tracking
How to Use the Reviv Mouth Guard
Step 1
Pick your size and wash it
Measure your bite width before ordering (see the tips below). When it arrives, the brand says to take it out of the box and wash it before first use.
Step 2
Wear it to sleep, building up slowly
The brand’s standard pattern is overnight plus 2–3 hours during the day. It recommends starting with shorter daytime sessions before full nights. Don’t wear it while eating.
Step 3
Wash, dry and store it
Wash it after use and let it dry. Keep it away from hot water, dishwashers and direct sunlight, since the brand warns heat may deform it.
Tips to Get the Most From Reviv
A few simple habits can make the first weeks easier and help you judge whether Reviv suits you.
- Measure your bite carefully. The brand suggests biting into a slice of soft bread and measuring the mark from molar to molar. For R1, under 6.0 cm means Small; for R2, under 6.2 cm means Medium. If you’re between sizes, the brand suggests going one size up.
- Ease in gently. Sore teeth, achy gums, extra saliva and lips that don’t fully close are common early on, according to the brand. If soreness turns sharp, take a few hours or a day off rather than pushing through.
- Keep your dentist in the loop. Bring the guard to your next checkup and ask your dentist to keep an eye on your bite, gums and any new gaps between teeth.
- Track how you feel. Jot down morning jaw tension, headaches and sleep quality once a week. A simple log makes it much easier to tell whether it’s helping.
- Pair it with daytime habits. The NIDCR lists behavior change and stress management alongside mouth guards, and the Mayo Clinic notes that treating sleep problems such as sleep apnea may help sleep bruxism.
- Replace it when it wears. Check regularly for splits or collapsed air holes. The brand says the R1 lasts about 2–4 months, so heavier grinders may prefer the R2.
What to Expect Over Time With Reviv
The brand shares its own expected timeline. Here’s a summary, in the brand’s terms:
- First week: the brand says to expect some discomfort in the teeth and gums, and that it may take a few nights to get used to sleeping with it.
- First month: the brand says the guard usually feels more comfortable, you may notice differences in how your teeth fit together, and many users report a less tense jaw in the morning.
- A few months and beyond: the order page says users “feel the difference in just a few months.” The brand also describes long-term goals around concentration, energy and appearance after a year or more; these are its own expectations, not established outcomes.
Individual results vary. If you notice your bite changing, check in with your dentist.
Reviv Safety: What to Know First
Reviv is a simple device, but because its method aims to change how the jaw rests, a few safety points matter more than with a standard guard. Most of these come straight from the brand’s own product terms.
- Check with a dentist first if you have loose teeth, braces, or untreated dental or gum disease. The brand says not to use it in these cases without professional advice.
- Crowns, veneers and bridges: the brand warns the appliance may put pressure on teeth that could loosen or dislodge dental restorations.
- Bite changes: the brand states its process may create a posterior open bite, which it says then needs support from continued nightly wear or dental composite work, and that unsupported changes could lead to TMJ issues. The NIDCR advises people with jaw-joint disorders to avoid treatments that cause permanent changes in the teeth or bite (NIDCR TMD guide). Talk this through with your dentist before long-term use.
- Early side effects: the brand lists headaches or head pressure, sore jaw, teeth or gums, small mouth sores, temporary speech changes and temporary gaps between teeth.
- Gum irritation: if your gums get irritated or you notice recession, the brand says to pause until they heal and resume gradually. Persistent recession needs a dentist’s review.
- Sleep apnea: the brand says Reviv is not designed to address sleep apnea and isn’t a substitute for medical treatment. Loud snoring, gasping at night or heavy daytime sleepiness are worth raising with a doctor (see our sleep apnea guide).
- Choking risk: the brand notes a rare choking hazard if the guard comes loose during sleep. Stop use and see a dentist if this happens.
- Children: because the method aims to change the bite, children should only use it under a dentist’s or orthodontist’s guidance.
Stop using it and see a dentist or doctor if you have severe pain, a bite change that makes eating difficult, breathing problems, or any symptom that worries you. For general oral health basics, see our dental health guide and our Medical Disclaimer.
What Buyers Say
The official order page shares a few customer stories describing changes in jaw angle, posture and facial appearance after several weeks of use. The brand’s store also hosts customer reviews, and many describe a comfortable fit, less morning jaw tension and relief from clenching.
The more mixed reviews are useful too. Common themes include an adjustment period with sore gums, the guard slipping out at night early on, sizing that felt slightly off, and the R1 wearing out quickly for heavy grinders, which matches the brand’s own 2–4 month estimate for that model.
These testimonials are vendor-published and haven’t been independently verified, and results vary from person to person.
Reviv vs. a Dentist-Made Night Guard
| Reviv | Dentist-made night guard | |
|---|---|---|
| Fit | Two ready-made sizes per model, chosen by bite width | Custom-made from impressions of your teeth |
| Design goal | Flat surface that props the jaw slightly open, per the brand’s method | Protects teeth and stabilizes the bite; often hard acrylic |
| Cost | $100 (R1) or $150 (R2) on the official order page | Usually much higher; varies by dentist and insurance |
| Professional monitoring | None built in; you arrange dental checkups yourself | Fit and bite checked at follow-up visits |
| Returns | Final sale; refunds only for non-delivery or wrong item | Depends on your dentist’s policy |
If your main goal is tooth protection with professional follow-up, a dentist-made guard is the traditional route. If you’d like an affordable, ready-to-wear option and are curious about Reviv’s approach, it’s a reasonable alternative, ideally with your dentist aware you’re using it.
How Much Does the Reviv Mouth Guard Cost?
Reviv is sold through its official order page in two models, and each model comes in two sizes at the same price. Here’s what we found:
Reviv R1 · Small or Large
$100
Per appliance, one-time purchase
Lighter, entry-level model
Most durable option
Reviv R2 · Medium or Large
$150
Per appliance, one-time purchase
1-year replacement guarantee
Prices were checked on the official order page on October 23, 2026, and may change. We saw no subscription for the appliance itself. Orders are processed by the retailer ClickBank, which may appear on your card statement and handles order support. The brand says orders typically ship within 48 hours and take about 9–13 days to arrive in most destinations, including the US.
Since the brand rates the R1 at about 2–4 months of use and the R2 at 12+ months, the R2 may work out cheaper over a year for nightly users.
✔︎ Food-Grade Material
✔︎ BPA-, Latex- & PVC-Free (R1)
✔︎ Flat-Plane Design
✔︎ Two Sizes Per Model
✔︎ 1-Year Replacement on R2*
Reviv Refund Policy and Replacement Guarantee
Reviv doesn’t offer a money-back guarantee, so it’s worth knowing the terms before you buy. Here’s how the official refund policy and the brand’s replacement guarantee work:
- Final sale: the appliance is sold as final sale, with no returns or refunds once it ships. The brand cites hygiene and the cost of overseas return shipping.
- Refund exceptions: refunds are only issued if the product never arrives or you receive the wrong item. For non-delivery, the brand’s policy says it first attempts a reshipment.
- Missing or partial deliveries: claims need clear photos of the outer package, the shipping label and the items received.
- R2 replacement: if an R2 breaks under normal use within 12 months, the brand says it will replace it free, once per customer account. You email customer service with your order number and a photo of the damaged guard.
- Local law exceptions: where a country’s consumer law requires returns (such as the UK), the buyer pays return postage to the brand’s US fulfilment center.
Practical tip: measure your bite carefully before ordering, since a wrong size isn’t covered, and keep your packaging and order confirmation until the guard arrives. Contact details are listed on the official refund policy page.
Why Reviv May Be Worth Considering
If you clench or grind at night and want something simpler and more affordable than a lab-made guard, Reviv is an easy way to start. It’s ready to wear, sized from published dimensions, made from food-grade material, and the R2 comes with a full year of replacement coverage.
It’s also a good fit if you’re curious about the brand’s jaw-opening approach and like the idea of easing in gradually. Treat the bigger promises as the brand’s goals rather than guarantees, keep your dentist involved, and you’ll be well placed to judge it for yourself.
Final Verdict: Is the Reviv Mouth Guard Worth Trying?
Reviv does the core job of a night guard well, according to many of its reviewers: it cushions the teeth, feels soft once you adapt, and gives clenchers a simple nightly routine. The R2 stands out for its durability and 1-year replacement coverage, and the brand’s sizing information is more transparent than most.
Its bigger claims about facial structure, energy and aging are unproven, and because the method aims to change how your bite rests, it isn’t for everyone. If you’re an adult grinder with healthy teeth and gums, willing to build up wear slowly and check in with your dentist, Reviv is reasonable to try. Since it’s final sale, measure your bite carefully before you order.
Reviv Mouth Guard FAQ
What is the Reviv mouth guard?
A soft, ready-to-wear night guard with a flat bite surface. The brand says it cushions the teeth and gently props the jaw open during sleep.
What is Reviv made of?
The order page describes it as 100% food-grade silicone. The brand says the R1 is food-grade TPE that’s BPA-free, latex-free, phthalate-free and PVC-free, and the R2 is premium soft silicone.
Does Reviv stop teeth grinding?
Night guards protect teeth from grinding, but research hasn’t shown that guards stop grinding itself. Many users report less morning jaw tension; results vary.
What’s the difference between R1 and R2?
R1 is the lighter, lower-cost entry model that the brand says lasts about 2–4 months. R2 is more durable (12+ months, per the brand), gentler on gums and comes with a 1-year replacement guarantee.
How do I choose my size?
Bite into soft bread and measure the mark from molar to molar. For R1, under 6.0 cm is Small; for R2, under 6.2 cm is Medium. If you’re between sizes, the brand suggests sizing up.
How do I wear Reviv?
Wear it to sleep, and optionally for 2–3 hours during the day, building up gradually. Don’t wear it while eating, and wash and dry it after use.
How long until I notice a difference?
The brand says the guard usually feels more comfortable within about a month and that users “feel the difference in just a few months.” Individual results vary.
Are there side effects?
The brand lists early soreness in the teeth, gums or jaw, headaches, small mouth sores, extra saliva and temporary speech changes. Stop and see a dentist if pain is severe.
Can Reviv change my bite?
Yes. The brand’s terms say its process may create a posterior open bite over time. Discuss this with your dentist before long-term use.
How much does Reviv cost, and is there a subscription?
On the official order page, the R1 is $100 and the R2 is $150. We saw no subscription for the appliance; it’s a one-time purchase.
Is there a money-back guarantee?
No. It’s sold as final sale, with refunds only for non-delivery or the wrong item. The R2 has a 1-year replacement guarantee if it breaks under normal use.
Where can I buy Reviv?
It’s sold only through its official website. Buying there means you get the current sizes, prices and the brand’s own guarantee terms.
Can I use Reviv if I have sleep apnea, braces or crowns?
The brand says it isn’t designed for sleep apnea and shouldn’t be used with braces or loose teeth. If you have crowns, veneers or bridges, check with your dentist first.
Sources: Official Reviv order page, product pages, shipping policy and refund policy (accessed October 23, 2026); Mayo Clinic, Bruxism: diagnosis and treatment; MedlinePlus, Bruxism; NIDCR, Bruxism and TMD: Less Is Often Best; Macedo et al., Occlusal splints for treating sleep bruxism, Cochrane Database of Systematic Reviews 2007; Riley et al., Oral splints for temporomandibular disorders or bruxism, Health Technology Assessment 2020. Learn how we review products.
This article is for general information and isn’t a substitute for professional dental or medical advice. Reviv is an over-the-counter oral appliance and isn’t intended to diagnose, treat, cure or prevent any disease. Talk with your dentist before using any appliance that may change your bite, and see a doctor for jaw pain, breathing problems or suspected sleep apnea. See our Medical Disclaimer.