Mewing
Maintaining proper tongue-on-palate resting posture, claimed to improve jaw and midface definition over time.
Mewing, named after orthodontist John Mew, is resting the entire tongue against the roof of the mouth with lips sealed and teeth lightly together. Advocates claim consistent posture encourages forward maxillary growth and a more defined jaw.
The evidence is weak for adults: bone growth plates in the face are largely fused after adolescence, so dramatic structural change is unlikely. What mewing plausibly does is improve resting posture and reduce a slack, open-mouth look — a modest soft-tissue effect, not the bone remodeling often claimed online.
Does mewing actually work?
For adults, structural bone change is unlikely. It may modestly improve posture and reduce an open-mouth appearance.
How long does mewing take?
Any visible effect is gradual and subtle; dramatic before/afters online are usually angle, lighting, or body-fat changes.
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