Does mewing work? An honest look at tongue posture and jawlines

Mewing is resting your tongue flat against the roof of your mouth in the hope of reshaping your jaw and sharpening your jawline over time. It is one of the most searched looksmaxxing topics, so it deserves a straight answer rather than a hype video.

The claim

Advocates say steady tongue posture widens the palate, lifts the midface and defines the jaw and cheekbones — especially if you start young. The term traces to the orthodontic work of the Mew family, though the viral version online goes well beyond anything that research described.

What the evidence actually supports

Honestly: not much, for adults. There is legitimate orthodontic interest in oral posture and how the jaw grows in children, but solid evidence that tongue posture remodels adult bone is thin and mostly anecdotal. The dramatic "before and after" pairs you see are usually explained by camera angle, lighting, head posture, chewing-muscle changes, or fat loss — not new bone. A useful habit when judging any pair: check whether the lighting, distance and chin position actually match.

What is reasonable, and what is not

Keeping a relaxed, closed-mouth resting posture costs nothing and is fine. Expecting a new jaw from it is not, and aggressive techniques that strain the jaw joint can do real harm. If you have genuine concerns about your bite, breathing or jaw alignment, those are medical questions for an orthodontist or doctor — people who can actually image and assess your jaw, which no app or video can.

A realistic baseline

If you are curious where your jaw and chin sit today, a profile analysis measures the gonial (jaw) angle and chin projection from a side photo. That gives you an honest starting point to reason from — far more useful than squinting at a mirror or trusting a thumbnail.