Mewing Results — What Does the Science Actually Say?
Mewing — the practice of holding your tongue flat against the roof of your mouth — has limited scientific evidence for changing facial structure in adults. While correct tongue posture may improve breathing and reduce snoring, the dramatic jawline and cheekbone changes promoted on social media are not supported by peer-reviewed research. This guide examines every claim against the available evidence.
Key Takeaway
Mewing has limited evidence for changing facial structure in adults.
What Is Mewing?
Mewing is named after Dr. Mike Mew, a British orthodontist who promotes a discipline he calls “orthotropics.” The practice involves resting the entire tongue against the palate, maintaining sealed lips, and keeping the teeth in light contact. It is part of a broader philosophy that modern “soft” diets and habitual mouth breathing cause the face to lengthen vertically over time, resulting in a less defined jawline and recessed midface.
Proponents claim that consistent tongue posture can expand the maxilla (upper jaw), reshape the face, improve nasal breathing, and enhance jawline definition. These claims have gained significant traction on social media, particularly among young men seeking non-surgical facial improvement.
What Is Orthotropics vs. Orthodontics?
Understanding the distinction between these two approaches helps contextualize where mewing sits in the broader landscape of facial development.
| Aspect | Orthodontics | Orthotropics (Mew) |
|---|---|---|
| Approach | Teeth alignment, often with braces or aligners | Facial growth guidance through oral posture |
| Core belief | Genetics primarily determine facial structure | Oral posture and environment shape the face |
| Evidence base | Extensive peer-reviewed literature | Limited; mostly case reports |
| Professional status | Mainstream medical specialty | Not recognized by major orthodontic bodies |
What Does the Science Say About Mewing?
The theoretical basis: Wolff’s Law
Wolff’s Law states that bone adapts to the mechanical loads placed upon it. In growing children, tongue pressure during swallowing — which occurs 500 to 1,200 times daily — can exert up to 5 pounds of force on the nasomaxillary complex. This force can theoretically stimulate palate expansion and forward midface growth in children whose sutures have not yet fused.
The clinical reality
Bone remodeling is significantly slower in adults. The midpalatal suture, which allows the maxilla to widen in children, begins fusing in the mid-teens and is typically fully ossified by the mid-twenties. Adult gains in palate width — approximately 2mm in the studies that exist — often lack long-term stability. No randomized controlled trials have tested mewing specifically. The available evidence is limited to case reports and retrospective studies, which cannot establish causation.
What Does the British Orthodontic Society Say About Mewing?
There is no scientific evidence to suggest patients can change the shape of their face… by holding the tongue in a closed position.
The following table summarizes how different groups view the evidence around mewing and tongue posture.
| Perspective | Position |
|---|---|
| Orthotropics (Mew) | Modern soft diets and mouth breathing cause facial lengthening; tongue posture can reverse this |
| Mainstream orthodontics | Facial structure is a complex mix of genetics and growth; skeletal changes in adults generally require surgery |
| British Orthodontic Society | No evidence that tongue posture changes facial shape, improves breathing, or increases intelligence in adults |
| Scientific evidence | Bone remodeling significantly slower in adults; ~2mm palate gains often lack long-term stability |
What Happened to Dr. Mike Mew?
In 2024, Dr. Mike Mew was struck from the dental register in the United Kingdom following allegations of “inappropriate and misleading” treatment recommendations. The General Dental Council found that his advice posed risks to pediatric patients.
This does not automatically invalidate every idea within orthotropics. However, it significantly undermines the authority behind the claims, particularly given that the concerns centered on patient safety rather than academic disagreements.
Can Mewing Change Your Face as an Adult?
- Improved nasal breathing (correct tongue posture promotes mouth closure)
- Reduced snoring
- Better swallowing mechanics
- Improved posture awareness
- Minor improvements in tongue-palate contact over years
- Slight posture-related changes to perceived jaw position
- Significant maxillary expansion
- Visible cheekbone changes
- Dramatic jawline reshaping
- Forward growth of the midface
Why Do Before-and-After Photos Look Convincing?
Many mewing transformation photos circulating online are misleading due to common confounding factors that are rarely controlled for.
Weight loss and body fat reduction
the single biggest factor in jawline visibility changes
Natural aging and puberty completion
especially relevant in teens, where facial bones are still developing regardless of tongue posture
Lighting and angle differences
overhead lighting vs. front-facing light dramatically alters perceived bone structure
Facial hair changes
a beard or stubble can completely redefine the jawline silhouette
Improved posture
which genuinely does affect perceived jaw position by changing head-neck alignment
Photography focal length
wide-angle lenses distort facial proportions significantly compared to telephoto lenses
What Are the Risks of Mewing?
- ×TMJ issues from incorrect technique or excessive force against the palate
- ×Jaw pain and headaches from sustained, unnatural muscle tension
- ×Worsened bite alignment if incorrect tongue posture applies asymmetric pressure
- ×Opportunity cost — time and attention spent on mewing instead of pursuing evidence-based treatments
- ×Psychological impact of false expectations, particularly for young people who may experience frustration or body image distress when results do not materialize
What Actually Works for Facial Structure Improvement?
If you are looking for measurable changes to jawline definition or facial proportions, the following approaches have stronger evidence behind them.
Body fat reduction
the most impactful change for jawline visibility. Submental fat (under the chin) obscures bone structure regardless of skeletal shape.
Dermal fillers
hyaluronic acid or calcium hydroxylapatite injections at the mandibular angle provide targeted contouring for 12 to 18 months.
Orthodontic treatment
braces or clear aligners correct bite and alignment issues, which can meaningfully change facial profile.
Orthognathic surgery
for significant skeletal discrepancies, surgical repositioning of the jaw is the only approach with consistent, permanent results.
Good posture habits
head and neck posture genuinely affects how your jaw and chin appear, and this is the one element of mewing philosophy that holds up.
For a deeper look at these options, read our evidence-based jawline improvement guide.
Understand your starting point first
Before exploring any improvement method, analyze your facial proportions with our free AI tools. Our face shape detector and symmetry analyzer give you objective measurements so you can track real changes — not lighting tricks.