Hello, this is Mary Plastic Surgery Clinic, nice to meet you.
These days, Devil's Game 2: Death Room is a hot topic. I've been watching one episode every day after work, and while I was amazed by Son Eun-yu's play, in the later part her jawline came back to life, so I wanted to talk about that!
I think the final in my heart was Episode 10. I kept hoping that Eun-yu would get to enjoy delicious meals in the dormitory.
Her jawline came back? We analyzed the changes in Son Eun-yu's double chin after losing 3.5 kg, scientifically.
What captured the public's attention was not just that she had “lost weight,” but that her jawline had changed dramatically.
During the filming period, noticeable changes appeared in a short time,
and questions like, “Can a double chin really disappear that quickly just from weight loss?” started popping up everywhere.
Can a double chin really improve just from short-term weight loss?
As a plastic surgery specialist, I'll explain based on analysis and scientific evidence.
Source: https://www.youtube.com/watch?v=_a_AITzxPBw
The scientific relationship between weight loss and a double chin


Source: https://www.youtube.com/watch?v=_a_AITzxPBw
The angle of the lower jawbone looks clearly more pronounced.
A double chin (submental fat) is not simply something that appears because you gained weight. In fact, facial fat cells have lower fat-breakdown efficiency than those in the abdomen or thighs, and because lymphatic circulation is not smooth, they do not reduce easily even when you lose weight.
Why doesn't a double chin simply disappear when you lose weight?
- Low fat-breakdown efficiency
Facial fat has a lower density of β-3 adrenergic receptors, so at the same level of calorie expenditure, fat breakdown is about 40% slower than in the abdomen.
- Poor lymphatic circulation
The area under the chin has a low density of lymph vessels, so after fat breakdown, its ability to remove waste products is limited, and re-accumulation happens quickly.
- Reduced skin elasticity
If the skin's ability to contract decreases after weight loss, it can actually give the impression that the jawline is even more sagging.
For these reasons, simple weight loss alone does not easily improve a double chin.
This is especially true when genetic factors, decreased elasticity, and poor lymphatic circulation overlap.
There is no fixed standard stating how many kilograms you must lose to improve a double chin, but in general, losing more than 5 kg can lead to changes in the face and jawline. Because the face tends to lose fat more slowly than other parts of the body, losing around 1–2 kg does not usually bring major changes to the chin area or double chin. And when you lose 5 kg, there are disappointments that come from not being able to lose only the area you want, such as overall loss of firmness throughout the body (especially the face ㅜㅜ), a reduction in breast size, and so on.



A double chin that won't go away with simple weight loss,
with Mary Double Chin Zero Surgery!!
Because of these structural limitations, there are many cases where weight has gone down but the jawline still looks blunt, or even more droopy.
That is why the solution that appeared is Mary Plastic Surgery Clinic's “Double Chin Zero Surgery,” which creates a real jawline.
“Double Chin Zero” is not simple liposuction.
It is a complex surgery that includes anatomical analysis → structural improvement → fixation so it doesn't loosen again.

Mary Double Chin Zero Surgery has three key points that differentiate it from other procedures.
- Muscle binding
Tightening the muscle layer under the chin to neatly reorganize the structure
- Removal of hidden fat inside the muscles
Precisely removing even the fat inside the muscles that cannot be removed with ordinary liposuction
- Mary’s specialized fixation method
Securing long-term durability so that the jawline does not collapse over time, not just immediately after surgery
This surgery is not simply about removing fat; it is a delicate procedure that designs a “firm jawline structure.”
Please pay attention if you are someone who:
lost weight through dieting but saw no change in the jawline,
have a blunt jawline that gives a sagging impression,
have submental fat that does not come off easily due to genetic factors or repeated yo-yo dieting,
are worried about sagging after fat removal because of reduced skin elasticity


As in Son Eun-yu's case, a jawline change occurring in a short time under extreme conditions is an exceptional situation. It is what people call a diet due to emotional stress... In most cases, it is difficult to achieve a complete jawline with simple weight loss alone.
Mary Plastic Surgery Clinic's “Double Chin Zero Surgery”
is a procedure that accurately analyzes the root cause of the double chin and improves it structurally to bring out the jawline.
The reason a natural, clear jawline can be maintained for a long time is right here.
If you have any questions, feel free to contact us anytime through the comments or by adding us as mutual neighbors.
At Mary Plastic Surgery Clinic, located in Apgujeong, we provide guidance on the most suitable method through 1:1 personalized consultation 😊
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That has been Mary Plastic Surgery Clinic, nice to meet you.