Mewing Results After 6 Months: What the Data Actually Shows
The internet has been arguing about mewing for years. Forum threads filled with blurry before-and-after photos. YouTubers claiming jaw transformations that conveniently coincide with hitting puberty. Skeptics who dismiss the entire thing as pseudoscience. Believers who swear it restructured their skull.
Nobody brought data. We did.
Over the past year, 1,247 BlackPill users opted into jaw-tracking analytics while practicing mewing. They took biweekly AI scans. We measured gonial angles, bigonial width, facial thirds ratios, and jaw definition scores across every single scan. No self-reports. No subjective assessments. Just raw numbers generated by computer vision that doesn't care whether mewing "should" work or not.
Here's what six months of that data looks like.
Want to track your own mewing progress with AI? Start with a baseline scan on BlackPill for iOS or BlackPill for Android. You'll get jaw-specific measurements from day one.
The Cohort: Who We Tracked
Our dataset includes 1,247 male users aged 18-34 who:
- Self-reported practicing mewing for at least 6 months
- Completed a minimum of 12 scans over that period (biweekly cadence)
- Had no jaw surgery, injectable fillers, or orthodontic work during the tracking window
We split the cohort into three groups based on consistency, measured by how many hours per day users reported maintaining proper tongue posture:
| Group | Daily Practice | Users | Avg. Age |
|---|---|---|---|
| Casual | 2-4 hours/day | 483 | 24.1 |
| Committed | 6-10 hours/day | 512 | 22.8 |
| All-day | 12+ hours/day | 252 | 21.3 |
Average age matters here. Research from the European Journal of Orthodontics (Mew, 2004) suggests that younger individuals with less calcified sutures may respond more to orthotropic forces. Our data reflects this — the most consistent group also skewed youngest.
What We Measured
BlackPill's AI tracks four jaw-related metrics:
Gonial angle — the angle formed at the jaw's corner where the ramus meets the body. Lower angles (closer to 120-125 degrees) indicate a more defined, angular jaw. Average for adult males: 128 degrees (Kolahi et al., Surgical and Radiologic Anatomy, 2019).
Bigonial width — the distance between the two gonion points (jaw corners). Wider relative to facial width correlates with higher masculinity and attractiveness ratings (Cunningham et al., Journal of Personality and Social Psychology, 1990).
Lower facial third ratio — the proportion of the face occupied by the lower third (nose base to chin). Ideal range sits between 32-35% of total facial height.
Jaw definition score — BlackPill's composite score (1-10) that factors in all of the above plus jaw contour sharpness, submental fat, and mandibular border definition.
The Results: 6 Months of Data
Gonial Angle Changes
| Group | Baseline | Month 3 | Month 6 | Change |
|---|---|---|---|---|
| Casual | 130.2 | 129.8 | 129.5 | -0.7 |
| Committed | 129.7 | 128.9 | 128.1 | -1.6 |
| All-day | 129.1 | 127.8 | 126.4 | -2.7 |
The all-day group showed the most movement — a 2.7-degree decrease in gonial angle over 6 months. That's measurable and visible in side-profile scans. The casual group barely moved. The committed group landed in between.
For context: a 2-3 degree change in gonial angle is roughly equivalent to the visual difference between a "soft" jawline and a "defined" one. It won't turn a round face into Henry Cavill, but it's not nothing.
Bigonial Width Changes
| Group | Baseline (mm) | Month 6 (mm) | Change |
|---|---|---|---|
| Casual | 104.3 | 104.8 | +0.5 |
| Committed | 105.1 | 106.4 | +1.3 |
| All-day | 104.7 | 107.1 | +2.4 |
Bigonial width increased across all groups, with the all-day practitioners gaining 2.4mm on average. This is consistent with masseter hypertrophy research — Kiliaridis et al. (Journal of Oral Rehabilitation, 1995) documented similar gains from increased masticatory activity, noting that the masseter muscle can increase in cross-sectional area by 15-20% with sustained chewing exercise.
It's worth noting that mewing alone doesn't isolate masseter engagement — many of these users also chewed mastic gum (68% of the all-day group reported concurrent gum chewing). We can't fully separate the two variables, and we're honest about that.
Lower Facial Third Ratio
| Group | Baseline | Month 6 | Change |
|---|---|---|---|
| Casual | 34.2% | 34.1% | -0.1% |
| Committed | 33.8% | 33.5% | -0.3% |
| All-day | 33.9% | 33.1% | -0.8% |
These changes are small. The lower facial third ratio barely moved for most users. This makes physiological sense — changing the vertical dimension of the face requires significant skeletal adaptation, which is slow and may be limited in adults. The all-day group's 0.8% shift suggests some postural repositioning of the mandible, but calling this a "transformation" would be dishonest.
Jaw Definition Score (BlackPill Composite)
| Group | Baseline | Month 3 | Month 6 | Change |
|---|---|---|---|---|
| Casual | 4.8 | 5.0 | 5.2 | +0.4 |
| Committed | 5.1 | 5.5 | 5.9 | +0.8 |
| All-day | 5.0 | 5.6 | 6.3 | +1.3 |
The composite jaw definition score tells the clearest story. All-day practitioners gained 1.3 points on the jaw definition subscale — a meaningful, visible change when you compare month-0 and month-6 scans side by side. Committed users gained 0.8. Casuals gained 0.4 — enough to notice if you're looking for it, but not enough to change how others perceive your face.
What About Overall Attractiveness Score?
Jaw definition is one component of the overall composite. Here's how total attractiveness scores moved:
| Group | Baseline | Month 6 | Change |
|---|---|---|---|
| Casual | 5.3 | 5.5 | +0.2 |
| Committed | 5.4 | 5.8 | +0.4 |
| All-day | 5.2 | 5.9 | +0.7 |
A 0.7-point overall score improvement from jaw changes alone is solid. But it's not the 2+ point transformations we've documented from users who combine mewing with skincare, grooming, body composition changes, and posture correction. Mewing is one lever. It's not the whole machine.
BlackPill's AI Coach knows this — when it builds your improvement plan, jaw training is one line item among many, weighted by your specific baseline scores and where the highest ROI sits for your face.
The Honest Assessment
Here's what the data supports and what it doesn't.
Mewing works — within limits.
The evidence is clear that 6 months of consistent, all-day tongue posture practice produces measurable changes in gonial angle (-2.7 degrees), bigonial width (+2.4mm), and jaw definition score (+1.3 points). These are real numbers from AI-tracked measurements, not forum anecdotes.
But the effect is dose-dependent.
Casual practitioners (2-4 hours/day) saw minimal results. You can't mew during your morning commute and expect jaw restructuring. The data shows a near-linear relationship between daily practice hours and outcomes. This aligns with Wolff's Law — bone adapts to the loads placed upon it, but the stimulus has to be sustained and consistent.
Age matters.
Our all-day group skewed younger (average 21.3 years). Users over 28 in the same group showed approximately 40% less change in gonial angle compared to users under 23. The sutures of the maxilla begin calcifying in the mid-twenties (Persson and Thilander, Acta Odontologica Scandinavica, 1977). This doesn't mean mewing is useless for older adults — masseter hypertrophy still occurs regardless of age — but skeletal changes become harder to achieve.
Mewing alone isn't enough for most people.
The biggest transformations we track on BlackPill come from stacking multiple interventions: skincare + jaw training + body composition + grooming. Users who mew and do nothing else see modest improvements. Users who mew as part of a comprehensive plan guided by their AI Coach see their total score move 1.5 to 2.5 points in the same timeframe.
What Realistic Expectations Look Like
Based on our dataset, here's what you can reasonably expect from 6 months of dedicated mewing:
| Metric | Realistic Outcome (Committed) | Best Case (All-Day, Under 25) |
|---|---|---|
| Gonial angle change | -1 to -2 degrees | -2 to -4 degrees |
| Bigonial width change | +1 to 2mm | +2 to 3mm |
| Jaw definition score | +0.5 to +1.0 | +1.0 to +1.8 |
| Overall attractiveness score | +0.2 to +0.5 | +0.5 to +0.9 |
These aren't life-changing numbers in isolation. But they're real, measurable, and free. And when you stack them with other improvements, they compound.
The forums will keep arguing. The data doesn't care.
Start Tracking Your Jaw
The difference between mewing and effective mewing is measurement. Without data, you're guessing. You're relying on selfies taken at different angles with different lighting and convincing yourself you see a change.
BlackPill's AI doesn't guess. It measures gonial angles to the tenth of a degree. It tracks your jaw definition score alongside every other feature on your face. It tells you whether mewing is working for you specifically — not whether it worked for some anonymous poster on Reddit.
Your jaw. Your data. No guesswork.
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Stop arguing about whether mewing works. Scan your face. Do the work. Scan again. The numbers will tell you everything you need to know.