Rejuran in Korea is a polynucleotide (PN) injectable from the Korean maker Pharma Research, chosen to improve skin quality such as texture, elasticity, hydration and fine lines rather than to add volume. It is a PN product, not PDRN. On a skin booster menu it sits beside three other families: hyaluronic acid (HA) boosters aimed mainly at hydration, PDLLA collagen boosters such as Juvelook aimed at gradual firmness, and exosome solutions that are applied to the skin after microneedling. Which one fits depends on the main concern: thin or reactive skin, dryness, or slackening. A full-face PN session places small amounts at roughly 200 to 300 points after numbing cream, and raised bumps for one to three days are expected.
Guide
How PN differs from the other booster families
All four booster types share one menu heading, yet work differently. PN is a chain of purified DNA fragments in a water-based gel of about 20 mg per mL. It is placed in the upper dermis to support repair and the skin's own structure, so it is used as a quality treatment, not a filler.
HA boosters bind water and give a fast, dewy look. PDLLA products such as Juvelook (made by VAIM Global) combine poly-D,L-lactic acid particles with HA and work by prompting new collagen over weeks. Exosome solutions are not injected at all; they are spread over skin that has just been opened by microneedling and absorbed through those channels.
| Feature | Rejuran (PN) | HA booster | PDLLA + HA (Juvelook) | Exosome solution |
|---|---|---|---|---|
| Active material | Polynucleotide gel | Hyaluronic acid | PDLLA particles with HA | Exosome concentrate |
| How it reaches skin | Many small dermal injections | Small dermal injections | Dermal injections | Applied after microneedling |
| Main aim | Texture, elasticity, thin skin | Hydration and glow | Gradual firmness and density | Calming and support after needling |
| Visible marks afterward | Small bumps for one to three days | Small bumps, often brief | Bumps and some swelling | Redness from the needling |
Guide
Skin that tends to suit a PN booster
Doctors usually reach for Rejuran treatment in Korea when skin is thin, easily irritated, or slow to recover after laser. It is also common around the eyes, where heavy volume products can look puffy. People searching korea rejuran often want finer lines and smoother texture, which is the job PN is designed for.
Within the range, the doctor chooses the line as well. Healer is the core PN formula, HB Plus blends PN with HA and lidocaine for comfort, and the i line is a PN product made for thin eyelid skin.
Guide
When HA or PDLLA fits the goal more closely
If the main complaint is tight, dry skin before an event, an HA booster gives a faster visible effect, though it fades sooner. If the concern is soft slackening or loss of density on the lower face, a PDLLA product such as Juvelook is more often used, because its role is collagen stimulation over time.
Hollows that need real volume are a filler question, not a booster question. A careful consultation for any rejuran korea injection should say so plainly and explain when PN alone will not meet the goal.
Guide
What reviews of PN and HA report
A 2026 review in the Journal of Clinical Medicine by Khan and Hafeez compared HA fillers with polynucleotides for the under-eye area. The authors kept HA as the standard for restoring volume, while PN showed steady gains in elasticity, hydration and fine wrinkles with a favorable safety record. They also stressed that study designs and products vary, so firm conclusions are not yet possible.
A 2025 literature review by Titcomb in the Journal of Aesthetic Nursing reached a similar picture for skin rejuvenation in general: improved hydration, elasticity and dermal health, alongside gaps in how these products are regulated in the United Kingdom.
Guide
Side effects and reasons to wait
PN injections are not free of downtime. The small raised bumps at each point are the most common sign and usually settle within one to three days. Redness, swelling, stinging and bruising can also appear. Rare problems include infection, lumps that last longer, and allergic reactions.
Treatment is usually postponed in pregnancy or breastfeeding, over active acne or cold sores, and for anyone with a known allergy to fish-derived products. Results vary from person to person, and the effect of a course commonly lasts about four to six months.
Evidence
Research behind this page
- Hyaluronic Acid Fillers Versus Polynucleotides for Under-Eye RejuvenationJournal of Clinical Medicine · 2026 · doi:10.3390/jcm15134971
Review concluding that HA filler remains the standard for under-eye volume, while polynucleotides improve elasticity, hydration and fine wrinkles with a favorable safety profile, within a heterogeneous evidence base.
- A literature review on polynucleotide efficacy on skin rejuvenation, and review of the regulatory status and guidelines around polynucleotidesJournal of Aesthetic Nursing · 2025 · doi:10.12968/joan.2025.0009
Literature review describing better hydration, elasticity and dermal health with polynucleotides and noting gaps in the UK regulatory framework for these products.
FAQ
Questions about Skin boosters in Gangnam
Can Rejuran and an HA booster be given in the same visit?
Yes, many doctors combine them in one visit when the goals differ, such as PN for texture and HA for hydration. The products are usually placed in separate passes or areas so the doctor can control the amount of each. Expect more bumps and a slightly longer settling time than with one product alone. Ask the doctor to write down which product goes where and how much of each will be used, so a later session can be planned from the same record.
What does a typical rejuran korea review leave out?
Most online posts show the skin a few weeks after treatment and skip the first days of bumps and redness. They also rarely say which Rejuran line was used, how many sessions came before, or whether a laser was added. Posts tagged rejuran #korea are often filtered photos, so they say little about what one person can expect, and results vary from person to person.
Is a rejuran injection in Korea suitable for someone with a fish allergy?
It may not be, so mention any fish allergy before treatment. Polynucleotides are purified from fish DNA, usually from salmon or trout, which is why doctors ask about this allergy at the consultation. People with a confirmed allergy are generally steered toward another booster family, such as an HA product, and should bring notes on any past reaction. An HA booster is not derived from fish.
How soon can I fly after a rejuran treatment in Seoul?
Flying home the same day or the next day is generally acceptable after a PN booster. The main issue is appearance, not safety: small bumps and pinpoint redness may still be visible on the flight. Drink water, skip alcohol, and avoid pressing or rubbing the face during the trip. If several sessions are planned, the doctor will set the spacing around your travel dates, so share them at the first visit rather than at the end.
What should I tell the doctor at a rejuran seoul clinic before injection?
Tell the doctor about blood thinners, recent laser or peels, cold sores, pregnancy, and any allergy to fish or local anesthetic. These points decide whether treatment goes ahead that day and which Rejuran line is used, since HB Plus contains lidocaine. Also mention any filler or booster you have had in the same area. Written aftercare in a language you read well helps you follow the instructions once you are back at your hotel.