Mewing: What It Can and Cannot Do for an Adult Jaw

There is no evidence that mewing moves the bones of an adult jaw. In lookmaxxing videos it means pressing the whole tongue flat against the roof of the mouth, lips closed and teeth lightly together, in the hope that the jaw grows forward and the jawline sharpens. No published study shows that it changes adult facial bone. What does change how a jawline looks is overall body fat, fat under the chin and how far the chin projects. Only chin projection is set by bone; the other two are mostly fat. For a short chin, a chin implant in Istanbul starts from €4,020 with 6 nights in the package.

Where mewing comes from

The name comes from John Mew and his son Mike Mew in Britain, who promote tongue posture as part of a method they call orthotropics. Its original target was growing children, not adults. WebMD, in an article medically reviewed by dentist Robert Brennan in June 2026, notes that the North American Association of Facial Orthotropics says the approach works best in children aged 5 to 10.

A child's face is still growing, so habits such as mouth breathing can influence how it develops. An adult face has finished that growth. The same WebMD article says that changing teeth, face or jaw by resting the tongue is unlikely, especially once your bones have stopped growing.

What the evidence says for adults

Kevin O'Brien, a professor of orthodontics, wrote on his blog that he searched for published studies on mewing and found none. WebMD summarises the field the same way: there is no serious research showing that mewing changes the shape of the jawline. Before-and-after clips online usually compare different lighting, camera angles, weight or a tensed neck, not new bone.

There is a real risk if you push too hard. The American Association of Orthodontists, quoted by WebMD, warns that forcing the tongue into unnatural positions can shift teeth out of alignment, worsen bite problems, cause speech issues and lead to complicated treatment later. Clenching the jaw while you do it adds strain to the jaw muscles. If you notice your bite changing, see a dentist or orthodontist rather than pressing harder.

What a good resting posture can do

Resting with lips closed, breathing through the nose and keeping the tongue relaxed against the palate is a sensible habit. Holding your head up instead of pushing it forward also makes the angle under the jaw look cleaner in photos, because it stretches the skin and muscle under the chin. That is a posture effect you can switch on and off, not a structural change.

If you snore, wake up tired or cannot breathe through your nose, that is a medical question for a doctor or an ear, nose and throat specialist, not something to fix with tongue exercises.

What actually changes jawline definition

Body fat comes first. A 2009 study in the journal Perception by Coetzee, Perrett and Stephen found that how much fat people see in a face tracks body mass index. For most men, losing body fat is the free lever that reveals the jaw angle. It costs nothing and carries no surgical risk.

Fat under the chin can persist even at a healthy weight because of genetics. When it does, liposuction of that area is a short procedure: 30–60 minutes as a day case, back to work in 2–5 days, from €1,550. Our double chin liposuction guide explains who suits it and who should lose weight first.

Chin projection is set by bone, so neither diet nor posture can change it. If your chin sits behind a line dropped from your lower lip in profile, the jaw looks shorter and softer however lean you are. That is what a chin implant addresses, and it is the same conclusion we reach when comparing bone smashing versus a chin implant.

What a chin implant changes, and its limits

A chin implant is a solid silicone piece sized to your face. The partner surgeon places it through a small incision inside the lower lip or under the chin, in 45–60 minutes under sedation or light general anaesthesia, as a day case. Full details, including what the package covers, are on the page for a chin implant in Istanbul.

It moves the chin forward and can make the line from jaw to neck look sharper. It does not widen the back of the jaw, change your bite or remove fat. Jaw angle implants and sliding genioplasty, where the chin bone is cut and moved, are methods Estetica does not offer. A 2025 systematic review in Frontiers in Surgery (Kauke-Navarro and colleagues) counted 899 patients with silicone chin and jaw implants: 7.8% had a complication, including 0.33% infection and 1.3% displacement. Complications are uncommon but real, and it is a permanent device.

Cost and stay in Istanbul

The chin implant package starts from €4,020. It covers airport transfers, 6 hotel nights, an interpreter, hospital, surgery and implant costs, pre-operative blood tests and post-operative medication and follow-up. Flights are never included. Desk work is usually possible after 5–7 days, and the final contour settles by 6–8 weeks. To see how that price compares abroad, read our chin implant cost comparison for 2026.

Who should not have surgery for this

Skip surgery if your chin already sits on the profile line, if the real issue is overall body fat, or if your bite needs orthodontic or jaw treatment. Do not expect an implant to fix confidence, dating or how you feel about yourself: it changes a profile, not a life. If worries about your appearance take over your daily life, a doctor or psychologist is the right first step.

How to start

Send a front photo and a side profile photo in neutral light, teeth together and face relaxed, not posed. The partner surgeon tells you whether your chin projection is the issue and, if it is, which implant size fits. Consultations are for adults aged 18 and over only. The first video call with your assistant is free, and you can stop at any point before paying a deposit.