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Yoon Su-jeong

Director, Yoonsujung Clinic

Ewha Womans University College of Medicine · Residency, Korea University Medical Center · Adjunct Professor, Korea University Medical Center · Fellowship, University of Florida Shands Hospital · Senior Academic Director, Korean Academy of Dermatology, Obesity and Plastic Surgery (KACS)

23 columns Pigmentation·Lasers·Skin care2 min walk from Isu Stn. Exit 13 (Line 4·7)

Columns written by Yoon Su-jeong

23 columns
Yoonsujung Clinic · 4F, 109 Dongjak-daero, Dongjak-gu, Seoul
Weight & Metabolism

Why ultra-processed food gets in the way of weight loss and how to put together 10-minute meals when you have no time to cook

Foods that lose fibre and vitamins in processing and gain sugar, salt and additives make people eat more. In a…

2026.11.01 · 4 min read
Weight & Metabolism

Why to spread protein across your meals while dieting and how much to aim for each day

When you eat less, protein tends to drop too and muscle is lost more easily. In clinic we ask whether you are …

2026.11.01 · 5 min read
Weight & Metabolism

Why weight is hard to lose with insulin resistance and how to decide on meal timing

With insulin resistance, insulin stays high, fat is stored more easily and hunger signals come more often. Our…

2026.10.31 · 5 min read
Weight & Metabolism

How to choose a diet that suits you and where each type of dieter tends to slip

No single diet suits everyone. Research links weight loss to how long people kept to a diet more than to which…

2026.10.31 · 5 min read
Weight & Metabolism

Constant tiredness on a diet: when to check for nutrient gaps and thyroid function

If you eat less but feel tired all the time and your weight stays the same, the problem is sometimes too few n…

2026.10.30 · 4 min read
Weight & Metabolism

Why weight comes back when you stop diet medication, and how to taper it

Diet medication curbs appetite while you take it but does not change your eating habits, so appetite and weigh…

2026.10.29 · 5 min read
Weight & Metabolism

Why to start exercising for weight loss with 10 minutes a day, and what to change at an exercise plateau

If you keep doing the same workout and the weight that fell for the first two or three months has stopped, you…

2026.10.28 · 6 min read
Weight & Metabolism

How to tell fake hunger from real hunger, and why to start eating at 3 and stop at 7 on a hunger scale

If a particular food such as chocolate or fried chicken suddenly calls to you less than an hour after a meal, …

2026.10.27 · 8 min read
Weight & Metabolism

Why you eat little but do not lose weight, and how to find the hidden calories in your diet

If you eat three meals a day and your weight has stayed the same for weeks, I recommend looking for hidden cal…

2026.10.26 · 7 min read
Weight & Metabolism

Why not to skip meals before dinner plans on a diet, and how to choose when eating out

On a day with dinner plans, I recommend not going hungry all afternoon and having a snack about three hours be…

2026.10.25 · 6 min read
Weight & Metabolism

Why poor sleep leads to weight gain, and sleep habits while losing weight

When you are short of sleep, ghrelin, which drives hunger, goes up and leptin, which signals fullness, goes do…

2026.10.24 · 7 min read
Weight & Metabolism

Who intermittent fasting does not suit, and the signs it is time to stop

Intermittent fasting is not recommended for people prone to low blood sugar, people under heavy stress, people…

2026.10.23 · 8 min read
Texture & Hydration

What hyaluronic acid boosters and PN injections improve, and what stays the same

That hyaluronic acid skin boosters raise skin hydration and radiance has been confirmed by pooling several stu…

2026.10.03 · 4 min read
Pores & Sebum

Why your pores look the same after skin botox

Some people who say their pores did not change after skin botox turn out to have pores stretched by lost firmn…

2026.10.03 · 7 min read
Botox & Fillers

When a skin booster goes into a nasolabial fold instead of filler

A nasolabial consultation starts by sorting the cause, not the product. A fold cast by a hollow beside the nos…

2026.09.24 · 6 min read
Wrinkles & Firmness

When neck lines come from posture rather than age

Neck lines track how many times a day you drop your head more closely than they track your age. Neck skin is t…

2026.09.17 · 5 min read
Before & After Care

What happens if you drink on the day of a skin treatment

It is better not to drink on the day of a treatment. Alcohol opens the vessels and brings a flush of heat, so …

2026.09.15 · 4 min read
Sensitivity & Breakouts

Five things to stop when your skin suddenly flares up

When skin suddenly flares, the first move is to take things away, not to add them. Keep cleansing, moisturiser…

2026.09.12 · 4 min read
Weight & Metabolism

You lost the weight and only your face looks older: what is happening

Looking older after weight loss is not ageing that arrived overnight. The subcutaneous fat supporting the face…

2026.09.10 · 5 min read
Pigmentation

When pigment looks darker after a laser: how I tell recovery from PIH

Skin looking darker after a pigment laser splits into two things. If fine crusting and a temporary shift in pi…

2026.09.08 · 5 min read
Before & After Care

A first skin consultation in Seoul: what to prepare

If you are seeing a doctor about your skin in Seoul for the first time, three things make the visit go well: a…

2026.08.04 · 4 min read
Texture & Hydration

Will a skin booster fix makeup that will not sit? (Seoul)

If your makeup stopped sitting well, a skin booster is not automatically the answer. The cause splits three wa…

2026.08.02 · 4 min read
Lifting & Firmness

Ultherapy, Thermage or Shurink in Korea: which do you need?

These are not competing versions of the same treatment. Ultherapy Prime and Shurink use ultrasound; Thermage u…

2026.07.25 · 4 min read