Reviv One
A lightweight boil-and-bite mouthguard for first-time users — a simple, budget-friendly way to start your Reviv routine.
- ✓ Simple boil-and-bite fitting — molds to your teeth in minutes
- ✓ Lightweight and easy to use — built for first-timers
- ✓ Passed food-grade safety testing
How it works?
- Wear the mouthguard every night. Short daytime sessions of 1–2 hours can also support consistent use.
- The flat-plane design provides stable vertical jaw support without locking the bite, allowing the jaw to rest more naturally during sleep.
- You get 1 year of access to our Skool community where you have direct access to Ken and hundreds of others going through the same process.
- Ken provides personalised support by checking your progress journal weekly.
Shipping Information
- Shipping typically takes 7-10 days to most destinations including the US. More remote countries can take longer.
- Orders typically ship within 48 hours and you will receive a tracking number by email as soon as it ships.
The Problem
People today are having more physical and mental health issues than ever before
- ✓ Postural issues
- ✓ Depression and anxiety
- ✓ Chronic fatigue and poor energy
- ✓ ADHD, OCD, etc.
- ✓ Obesity
The traditional ways of fighting these things are falling way short
- ✓ Pharmaceuticals
- ✓ Diet / eating healthy
- ✓ Exercise
- ✓ Medical procedures
We at Reviv believe that there might be a structural root cause
- ✓ There is essentially a set of physics that hold the body up — and teeth play a critical role in this
- ✓ Because of these physics, the skull can essentially collapse inwards due to changes in the teeth
- ✓ The health of the skull is reflected by the quality of the curve of spee (how the upper and lower teeth come together)
- ✓ Orthodontics, extractions and grinding result in the flattening of this curve of spee
We believe the skull can be inflated like a ball
- ✓ Deflating is what we believe causes aging, asymmetry — and is at the root cause of most disease
- ✓ Inflating reverses all of those things and can be achieved with the help of a mouthguard
- ✓ As the skull 'inflates', the curve of spee improves
The Solution
A simple mouthguard addresses this structural collapse at its root cause
- ✓ The mouthguard acts like a doorstop that prevents the jaw from closing
- ✓ This stretches the soft tissue in the mouth and covering the skull
- ✓ When the soft tissue stretches, the skull inflates and the skeleton untwists
The teeth correct as a function of the skull correcting
- ✓ The cranial bones move outwards into better symmetry — the jaw moves to where it should be
- ✓ The teeth are connected to the bones & jaw, and so they 'go for the ride' and straighten as a result
- ✓ The body will function better and be stronger and more flexible as a result
Reviv makes three big hypotheses about the future of biomechanics
Is disease a function of biomechanical collapse?
If we don't collapse, maybe we don't die?
Can we look like a model if we take this to the end?
What should I expect from doing Reviv?
- Likely some initial discomfort in the teeth and gums
- May take a few nights to get used to sleeping with it
- The mouthguard is starting to get more comfortable
- You might notice some differences in how your teeth fit together
- Many users find their jaw feels less tense in the mornings
- You may notice you're waking up without the tight, clenched feeling
- You will likely function better (concentration, ability to handle complexity, etc)
- There's a good chance you have more energy and stamina than in years
- You probably will look better than you have in years
- The mouthguard alone has plateaued, but you're doing the 'fast method' stretches recommended in the community
- Things just keep improving functionally and aesthetically
- It seems almost difficult to get sick, and you seem to be in a good mood naturally most of the time
- You're playing for the 'end'
- Does this process really go as far as this crazy guy, Ken, thinks it does?
Three steps. All of them easy.
Take it out of the box and wash it
Wear it to sleep and 2–3 hours during the day
Wash it and let it dry
Learn more about how this method works
I Am Going to Challenge
Challenges traditional health views, introduces the balloon theory, and explores how dental health affects overall well-being.
Read post ↗
The Balloon Theory
Explains how dental health impacts overall well-being by linking teeth to various health issues and introduces methods for addressing these connections.
Read post ↗
How to Correct the Problem
Provides strategies for addressing dental health issues and correcting related problems for improved overall well-being.
Read post ↗
Need help selecting which Reviv mouthguard is best for you?
Compare Reviv mouthguardsQuestions, answered.
How should I start Reviv? Is there anything to be aware of? ›
On wearing it: the standard pattern is overnight + 2–3 hours during the day. Build up gradually with shorter intervals during the day first rather than going straight to overnights — that helps the soft tissue adjust. Most folks find the early phase is the hardest part, and it gets significantly easier after a few weeks.
On early discomfort: pretty common in the first few weeks. Sore teeth, achy gums, occasional small sores in the mouth, the lips not closing fully, extra saliva — all signs the soft tissue is stretching, not signs something is wrong. Take it at your own pace, and if the soreness gets sharp, take a short break — a few hours or even a day or two off is fine. Stick with it, but don't push through pain.
On accelerating results: what matters most is consistent use, then stretching to accelerate. The Fast Method in our community has stretches we recommend, including the Bite & Hold exercise that works alongside the mouthguard.
On mouth taping: a lot of folks tape at night to keep the mouth closed and help with guard retention while the tissue is still adjusting. Pairs well with Reviv.
Why does this work? ›
Think of the soft tissue (fascia & skin) covering the bones of the skull as a balloon. When you grind your teeth down, it is as if you're taking air out of the balloon.
When this balloon deflates, it crushes the skull, which in turn crushes the brain and causes cognitive and neurological issues over time.
In general, we as a society like to call this process 'aging.' But if you grind down your teeth faster, you 'age' faster. The good part: you can reverse the process by using the same physics in reverse — you 'add' height back to the teeth.
How many people have done this process? ›
Over 20,000 people have started using Reviv appliances and this method since late 2024.
How does sizing work? ›
Refer to the size chart above for measurements. We generally recommend adults get a Large because the Large is not that large and the Small is pretty small.
The Small can be used for children from about age 8 and up. Most adults with a smaller mouth will be fine with Small or Large, but will generally get a bit more of a stretch with Large.
What is Support? ›
When you purchase the 1-year Support package, you get access to:
- Our highly engaged Skool community of 3,000+ members doing this process
- A classroom of 60+ videos explaining how this works
- A journal to track your progress, which Ken reviews and comments on weekly
- The ability to DM Ken with your questions
Watch this video for more information about Support.
What is the appliance made out of? ›
Premium soft silicone.
Do you ship internationally? ›
Yes — Reviv ships to 30+ countries, and shipping is free.
Other Reviv products
Lightweight oral appliances for getting started with Reviv — a simple nightly routine, with optional support.
Choosing the right mouthpiece size is crucial for your comfort and the effectiveness of our product. Here's a straightforward guide to help you make the best choice:
Which Size Should You Choose?
Large Size
- This is suitable for most adults.
- Ensures a snug, comfortable fit for best effectiveness.
Small Size
- Designed for teens and adults with smaller mouths.
- Slightly narrower and shorter for a more precise fit.
Mouthpiece Dimensions
| Size | Length | Width | Height | Best for |
|---|---|---|---|---|
| Small | 4.7 cm | 6.0 cm | 2.5 cm | Teens & small adult mouths |
| Large | 5.0 cm | 6.7 cm | 3.0 cm | Most adults |
How to measure your mouth
- Measure between the outer edges of your molars with a ruler or soft measuring tape.
- Measure from the front of your upper teeth to the back of your molars.
- If you're between sizes, we recommend going one size up for comfort.
Need help on how to measure?
Check out this video — link
If you're still uncertain about which size to choose, feel free to reach out to me at ken@getreviv.com.