FREQUENTLY ASKED QUESTIONS

First two weeks: one piece, up to 10 minutes, once daily.

Regular use: one piece, 30 minutes, three times daily, ideally after meals.

Longer is fine if your jaw shows no stop signals: pain, clicking, locking. But more is not always better. Consistency is the mechanism.

Vertically, deliberately, and evenly on both sides. Think of an up-and-down “I” motion, not a sideways “L” grind.

Lips sealed, breathing through the nose, posture upright. Chewing with the mouth closed trains oral posture and nasal breathing at the same time; the hardness, texture and volume of the piece were calibrated to make closed-mouth chewing the natural way to chew it.

Because jaw tone is endurance, closer to posture than to a bench press. High repetition against moderate resistance builds it; occasional maximal effort mostly builds soreness, and past a certain hardness the load shifts from muscle to the jaw joint, neck and back start compensating, sessions get cut short, and consistency dies.

ONEJAW sits deliberately below the ultra-hard trainers for that reason. Where it sits on the scale.

Yes, that is the design. Daily, sustained use, not occasional bursts. Like posture work, small consistent input is what compounds.

Yes. Ease in, especially at the start; do not chew for hours at a time in week one. Watch the stop signals: pain, popping, clicking, locking. If any appear, stop and check with a dental or TMJ professional. The joint can absorb strain without warning you, and it is not worth testing. You only have one jaw.

Weeks, not days. Most people feel the muscles working in the first sessions and notice tone changes over four to eight weeks of daily use. Slow is the honest speed.

The protocol is built around the joint: vertical chewing, calibrated resistance, and clear stop signals, pain, clicking, or locking. Thirty minutes is the baseline session; beyond that, your jaw sets the limit. No pain, no clicking, no locking: keep going. Any of those: stop. If you have an existing TMD, check with your dentist before starting.

Teens and adults with adult or late mixed dentition, old enough to follow the stop-signal guidance and know when to stop. Like any firm gum it is a choking risk for young children; pediatric guidance generally advises against gum before around age five. Teenagers in active orthodontic treatment (splints, braces, expanders, retainers) should check with their orthodontist first. Parents: when in doubt, ask a dentist before your teen starts.

Ask your dentist or orthodontist first. Hard gum and orthodontic work do not mix by default, and recent dental work needs to heal before any resistance chewing. Once you are healed and cleared for normal chewing, ONEJAW can be used to keep muscle tone.

Mild fatigue when starting out is normal, like any new muscle work. Sharp pain, joint clicking, or anything abnormal is not: stop immediately and consult a dental or TMJ professional. Progress should feel challenging, not damaging.

It is sweetened with sorbitol, the standard sugar substitute in sugar-free gum. Like any sorbitol-sweetened food, excessive consumption can have a laxative effect. That is a property of sorbitol, not of ONEJAW, but if you chew several pieces a day it is worth knowing.

General information, not medical advice; when in doubt, see a doctor. Swallowing a piece by accident is not typically dangerous: gum is not digested, but it passes through within a few days like other indigestible food. Repeatedly swallowing large amounts has been linked to blockages, particularly in children, so treat it as an occasional accident, not a habit. Choking is a separate risk, common to any firm gum, especially for young children or if a piece is swallowed whole. Chew normally, keep it away from young children, and treat choking as you would any object.

No. Food-grade ingredients, produced under European food regulations. No active substances, no pharmaceuticals, nothing beyond the six ingredients listed above.

Strength and endurance come first; size takes longer. The primary purpose of ONEJAW is to build tonic muscle strength that helps you effortlessly hold your mandible up against your maxilla, 24/7. Because your tongue rests on the mandible, holding your jaw up brings your tongue with it, closer to the palate, which makes correct oral posture (‘mewing’) physically easier to maintain.

The payoff is a firmly toned look, with a sharper submental line as a natural side effect of that tongue-to-palate contact. And because your jaw is not hanging open, you are less likely to slip into a partial mouth-breathing habit. What we do not promise: a timeline, a guaranteed look, or any change to bone.

Two kinds of evidence, kept separate on purpose. Ours: measured tests, published in full on the Resistance page, including method, limits, and what is still in progress. The literature: a 2024 randomised trial in the Journal of Oral Rehabilitation measured significantly higher maximum bite force after weeks of gum-chewing training, but no measurable change in muscle thickness in that short window, the same pattern as the first weeks of any strength training.

What we do not claim: that a gum moves bone. Braces and expanders do that; ONEJAW works the muscle. We publish what the evidence shows, either way.

No. It is a food product, a chewing gum, built for training the chewing muscles. It is not designed to diagnose, treat or prevent any condition. If you have a medical question about your jaw, breathing or teeth, a professional is the right first stop.

No. It can complement good oral posture and, with your orthodontist’s agreement, help maintain muscle tone after treatment. It does not replace assessment, appliances or surgery, and we do not position it that way.

All of it lives on one page: the mass-retention test, the five-minute comparisons against hard and regular gums, the sensory criteria, the product facts and the protocol. The Resistance page.

A browser-based tool that overlays a calibrated reference line on a side-profile photo, letting you see how your midface and jaw projection compare to age-matched growth data, the same category of reference orthodontists use, adapted from a clinical X-ray process to a photo you take yourself. It runs entirely on your device; no photo is ever uploaded. The SNoutline page.

Anyone who wants to see, and track over time, where a profile sits against a growth reference: adults for themselves, parents for a child (with consent, and a professional’s eye first for any concern), practitioners as a quick visual reference. It shows position, not cause and not diagnosis.

It answers questions about facial development and the airway from a hand-curated research library, around the clock, and helps you work out which kind of professional is worth talking to. It gives orientation, not medical advice. It comes with the SNoutline subscription.

A subscription, currently at launch pricing, covering both the tool and the assistant. Cancel anytime through Stripe. Current price and the full SNoutline FAQ are on its page.

Same idea, different half of the day. The gum works the jaw and the habit of a closed mouth while you are awake. The tape supports that habit while you sleep: a soft fabric strip that gently keeps the lips together so breathing goes through the nose. Two habits, one goal: mouth closed, tongue up, nose doing the breathing. It is a comfort product, not a medical device, and it does not treat or diagnose anything. The mouth tape.

Clean, dry lips, no balm. Centre the X over closed lips, press for ten seconds, breathe through your nose. First time, wear it for twenty minutes while awake so it feels normal, then try a full night. One strip per night, single use. Peel slowly from a corner in the morning.

That is what the X-cut is for. It holds the lips together but leaves the corners of the mouth free, so it never feels like a seal: you can part your lips, speak, or take it off in a second if you want to. The fabric is soft and breathable, and the adhesive is made to hold through a full night and let go without pulling in the morning.

Skip it whenever nose breathing is not easy: a blocked nose, a cold, sinus trouble. Skip it after alcohol or anything that makes you drowsy, and on broken or irritated skin around the mouth. It is for adults. If you have a diagnosed breathing or sleep condition, ask the person treating you before using any mouth tape; we are not able to advise on that.

Many people who snore with an open mouth find the nights quieter once the mouth stays closed, and that is the main reason they buy it. We do not make claims beyond that. If snoring is a health worry for you or your partner, that is a conversation for a professional, not a strip of tape.

The corners are exactly what the X shape leaves uncovered. Nothing sits, rubs, or traps moisture there, which is where irritation and cracking usually start with full-width tapes. The adhesive is hypoallergenic and latex-free. Cold sores themselves are viral and not something a tape causes, but do not put a strip over an active one, and give any irritated skin a night off.

Soft breathable fabric with a hypoallergenic, latex-free adhesive. No fragrance in the strip. If your skin is very reactive, test a strip on your forearm for an hour first.

Air the strips. Adhesive vapour builds up inside any sealed pouch; that is the faint scent when you open it. Let the strips breathe for a few hours before first use and it clears, settling the tack to skin-ready. The strips themselves do not carry the smell.

It should come off clean, no glue, no redness; warm water loosens it if you are in a hurry. Facial hair reduces the hold, so trim around the lips or expect a lighter grip.

Thirty strips, thirty nights. The 3-pack and 5-pack are the same strips at a lower price per night.

No. Gum by day, tape by night. Nothing in the mouth when you sleep.

Choose a format on the gum page, add it to the cart, check out with your shipping and payment details, confirm. A confirmation email follows immediately.

Changes such as address corrections or quantity edits: within 2 hours of ordering, by email. After that we begin packing and may not be able to modify it. Cancellation: contact us as soon as possible; if the order has not shipped, we will do our best.

Email contact@onejaw.com within 2 hours of placing the order, or use the contact form. If the order has already shipped we cannot guarantee changes, but we will help you coordinate with the carrier where possible.

All major credit and debit cards (Visa, Mastercard, American Express) and PayPal. Charges are processed in EUR for European customers and USD for US customers; the final price includes VAT where applicable.

Yes, from 50 display boxes. Email contact@onejaw.com with your business details and order volume for a tailored quote. Bulk orders typically ship via DHL Express.

Orders ship from the Netherlands, Switzerland and the United States, worldwide. Shipping fees: Swiss orders 7.00 CHF; EU orders (excluding Greece) 6.99 EUR; US orders 4.99 USD. Other countries are calculated at checkout; import taxes or customs duties outside the EU are the buyer’s responsibility unless stated otherwise. Shipping policy.

We ship within 1 to 2 business days. After dispatch: Switzerland 1 to 3 business days; EU 3 to 7; USA 2 to 5; rest of world 7 to 14. Customs delays may occur depending on your location.

Yes. A shipment confirmation email with a tracking number arrives once your order ships. The carrier varies by location and fulfilment centre; large or express orders may come with a DHL tracking link.

Contact us within 5 days of delivery with your order number and clear photos where applicable: contact@onejaw.com or the contact form. We investigate and, if eligible, send a one-time free replacement.

The full policy is in the refund policy. In short: refunds are issued in the rare case of product defects (badly deformed, contaminated, or completely stale packs), reviewed case by case, as a one-time replacement if approved.

No. For hygiene and safety reasons we cannot accept returns of opened or used packs, gum or tape alike. Defective items are handled as replacements, see above.

Within 5 days of delivery, email contact@onejaw.com or use the contact form with your order number and clear photos of the issue. Each case is reviewed individually.

contact@onejaw.com, or the contact form below, for anything: product, protocol, orders, quality, wholesale. We aim to reply within 24 hours on business days, Monday to Friday, 9 to 17 CEST.