Skin Boosters in Korea (스킨부스터): Rejuran, Hyaluronic Boosters and Sculptra Explained

“Skin booster” (스킨부스터, seukin buseuteo) is a marketing term, not a single treatment. In Korea it can mean very different injections: hyaluronic acid for hydration, polynucleotides such as Rejuran (리쥬란), or collagen-stimulating products. The name tells you little. What matters is the ingredient, the approval status and the technique. This guide explains the main types and what the evidence and regulators say.

At a glance

Other brands sold in Korea, such as Juvelook (쥬베룩), use different ingredients. Ask for the ingredient and the brand rather than relying on the nickname.

Hyaluronic acid boosters: what an FDA label says

The US FDA approved SKINVIVE by Juvéderm in 2023 to improve skin smoothness of the cheeks in adults over 21. It is one example of an approved intradermal hyaluronic acid product, and Korean boosters are different products, but the label shows the type of information you should ask about.

• Approved area: the cheeks only. Safety and effectiveness elsewhere have not been established.
• Results last about six months, and an optional touch-up may be needed after one month.
• Common reactions: redness, lumps, swelling, bruising, pain, tenderness, firmness, discoloration and itching. The label says most resolve within 7 days.
• Serious risk: accidental injection into a blood vessel can cause serious, possibly permanent complications, including vision changes, blindness, stroke and skin scarring.
• Not for people with a history of multiple severe allergies or anaphylaxis, or with allergies to lidocaine or to hyaluronic acid fillers. Treatment should be postponed if there are skin sores, rashes or infections.
• Avoid strenuous exercise, extensive sun or heat, and alcohol for the first 24 hours. Tell the doctor about blood thinners. Safety has not been studied in pregnancy or breastfeeding.

Polynucleotides (Rejuran and similar): what the evidence says

A systematic review of polynucleotide treatment in aesthetic medicine included nine studies with 219 patients, and the studies were of low to moderate quality. The injections were associated with reduced wrinkles, better skin texture and improved elasticity, patient satisfaction was moderate to high, and side effects were mild and temporary. The authors still say there is limited consensus on the best use and call for higher-quality studies.

A 2026 conference talk reviewing the literature was more cautious. It noted that no injectable polynucleotide product is FDA-approved for aesthetic use, that only a few randomized trials suggest benefit for elasticity and texture, and that most studies are small with little long-term data. Whichever view you find more convincing, polynucleotide boosters are not a proven gold standard, and you should expect your doctor to say so.

Collagen stimulators: what the Sculptra label says

Sculptra is FDA-approved to correct shallow to deep nasolabial folds and other facial wrinkles, to correct fine lines and wrinkles in the cheek region in immune-competent people, and to restore facial fat loss in people with HIV. Two points matter for visitors:

• Nodules can appear late. The label warns of papules and nodules days to months after injection. In a post-approval study of 867 subjects followed to year 3, 28.4% had nodules or papules. Some lasted up to two years and sometimes needed treatment.
• Swelling, tenderness, redness, pain and bruising are very common in the first two weeks, though mostly mild to moderate.

Because problems can appear months later, ask what follow-up is available after you leave Korea.

Questions to ask the clinic

1. What exactly is in the product? Ask for the brand, ingredient and the box or label.
2. Is it approved in Korea for this use, and what is it approved for? Ask the clinic to show you.
3. How many sessions, how much product and how often? Get the number of sessions and the volume on the itemised estimate.
4. Who injects, and with what technique?
5. What could go wrong, and who will I see if it does? Ask about delayed lumps in particular.
6. Can I fly home afterward, and what should I avoid for the first days?

Who should be careful

• People who are pregnant or breastfeeding, who have a fish allergy (for salmon-derived products), or who have severe allergies or a history of keloid scarring.
• Anyone with active skin infection, acne flare, cold sores or open wounds in the area.
• People taking blood thinners, and anyone planning a laser or peel soon after. Ask about timing.

Warning signs that need prompt care

• Severe or increasing pain, or skin turning white, grey or blotchy.
• Any change in vision, or stroke-like symptoms. Call 119 or go to an emergency room.
• Fever, spreading redness or a hard, tender lump.

See what to do if a skin treatment goes wrong.

Useful Korean words

Frequently asked questions

Is a skin booster the same as filler?

No. Fillers add volume, while boosters aim at skin quality. The names overlap in marketing, so ask for the ingredient and the purpose.

Is Rejuran approved in the United States?

According to the 2026 talk above, no injectable polynucleotide is FDA-approved for aesthetic use. It is sold in Korea, so ask the clinic about its Korean approval.

How many sessions do I need?

It depends on the product and your skin. A clinic cannot honestly promise a number or a result in advance.

General information, not medical advice. Products and approvals change; confirm with a licensed doctor. Before you book, check the clinic on our map, build a visit card, and read how to read a Korean clinic estimate. See the About page for our sources and corrections policy.

Sources

• SKINVIVE by Juvéderm receives U.S. FDA approval (AbbVie)
• Sculptra labeling (FDA)
• The Effectiveness of Polynucleotides in Esthetic Medicine: A Systematic Review
• Salmon DNA: Widely used, poorly proven? (IMCAS World 2026)