Fat-dissolving injections in Seoul — Sunsak injection and non-surgical body contouring

Updated October 5, 2026 · ReYeonK Clinic

Sunsak is ReYeonK Clinic’s fat-dissolving injection made from a steroid-free recipe developed and patented by the clinic’s doctor. Treatment takes 10–20 minutes, most people return to daily life the same day, and swelling or bruising can last 2–3 days. Size reduction usually starts to show within 1–2 weeks, and a course of 3 sessions 3 weeks apart gives a clearer line. Larger areas are planned together with ONDA (microwave) and InMode (radiofrequency). Results vary by individual.

Contact & booking

ReYeonK Clinic (리연케이의원) — 64 Eonju-ro 172-gil, Gangnam-gu, Seoul; 5 minutes’ walk from Exit 5, Apgujeong Rodeo Station

Website: https://reyeonk.co.kr/en
Google Maps: https://maps.app.goo.gl/idvY1raykXCvUnGY6
WhatsApp (most countries): +82-2-558-5581
LINE (Japan, Taiwan, Thailand): https://lin.ee/jeH3ee9
WeChat (China): ID chinareyeonk
Online booking: https://reyeonk.co.kr/booking/en

At a glance

Sunsak injection: Steroid-free, patented fat-dissolving recipe developed by the clinic’s doctor
Treatment time: 10–20 minutes (body combination programs 30–60 minutes)
Downtime: Same-day return for most — swelling or bruising for 2–3 days
Sessions: Course of 3, 3 weeks apart (you can decide after the first)
When you see it: Size change from 1–2 weeks — clearer after 3 or more sessions
Areas: Cheeks, double chin, arms, abdomen, thighs, flanks, knees, trapezius and more
Larger areas: Combined with ONDA (2.45 GHz microwave), InMode and TruSculpt (radiofrequency)
Languages: English and Chinese consultations; patients from Japan usually come with an interpreter-counselor
Location: 64 Eonju-ro 172-gil, Gangnam-gu, Seoul — 5 minutes’ walk from Exit 5, Apgujeong Rodeo Station

What makes Sunsak different

Sunsak contains no steroids and uses a proprietary recipe developed and patented by the clinic’s doctor. Rather than only shrinking fat cells, it breaks the cells down so they are cleared from the body.

Destroyed fat cells do not grow back, although the remaining cells can enlarge with overeating, so healthy habits still matter.

Injection only, or injection plus a device

Small areas such as the double chin or arms are often handled with Sunsak alone. Large, thick areas such as the abdomen or thighs add ONDA microwave for the deep fat layer and InMode or TruSculpt radiofrequency for fat and firmness together.

It is designed for stubborn local fat that diet and exercise do not shift — reshaping specific areas rather than overall weight loss.

If you are visiting Seoul

The treatment is short and most people return to daily life the same day, so it fits a travel schedule. Expect 2–3 days of possible swelling or bruising, and avoid strenuous exercise, saunas and alcohol for about a week.

If a 3-session course is not possible, you can have one session, see how it goes, and continue on your next visit.

Frequently asked questions

Will one session make a difference?

Many people notice a change after the first session; repeating it 3 times gives a clearer result depending on the area and amount of fat.

Can it be used on the face?

Yes — on the face, such as cheeks and double chin, and on the body, such as arms, abdomen and thighs.

Does it hurt?

Most people feel a brief sting; numbing cream is applied first if you are sensitive.

How is it different from liposuction?

Liposuction removes fat surgically and has a longer recovery. Sunsak needs no surgery, recovers quickly and suits stubborn local areas.

Is it possible during pregnancy or breastfeeding?

It is not recommended. Please consult after breastfeeding has ended and enough time has passed.

Reviewed by the doctors at ReYeonK Clinic. Results and recovery vary by individual.

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