If you've spent any time researching Korean skin treatments, you've almost certainly come across Rejuran. It's one of the most talked-about treatments in Seoul — and one of the most searched by international visitors. But what exactly is it, how does it work, and is it right for your skin? Here's everything you need to know before you book.

The Basics

What Is Rejuran?

Rejuran is a skin regeneration treatment that uses PDRN (Polydeoxyribonucleotide) — a DNA fragment derived from salmon — injected directly into the skin to repair damaged cells, stimulate collagen production, and restore the skin's natural healing ability.

Unlike fillers (which add volume) or skin boosters (which add hydration), Rejuran works at a cellular level. It doesn't mask skin problems — it repairs the underlying tissue that causes them.

What It Does

What Does Rejuran Actually Do?

Repairs Skin Damage

PDRN actively repairs damaged DNA in skin cells — reversing the effects of UV exposure, pollution, stress, and aging at a cellular level.

Stimulates Collagen Production

Triggers the skin's natural repair response, encouraging new collagen production — improving firmness and elasticity over time.

Improves Skin Texture & Pores

Enlarged pores, rough texture, and uneven skin tone all improve as the skin's structure is regenerated from within.

Reduces Fine Lines

Not by filling them, but by thickening and strengthening the skin layer underneath — making fine lines less visible naturally.

Calms Inflammation

Strong anti-inflammatory properties make Rejuran particularly effective for sensitive, reactive, or redness-prone skin.

Which Formula?

Rejuran Healer vs S vs I vs HB — What's the Difference?

Most first-time patients start with Rejuran Healer — the original, most versatile formula. If you're sensitive to pain, ask about Rejuran HB Plus.

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The Treatment

What to Expect: Step by Step

Before: Numbing cream applied 20–30 minutes before the procedure.

During: A series of micro-injections across the face using a fine needle or mesotherapy gun. Takes 20–40 minutes depending on areas treated.

⚠️ The Bumpy Phase — Don't Panic

This is the part nobody warns you about — but we will. Immediately after your Rejuran treatment, your face will have small, raised bumps at all the injection sites, giving your skin a distinctly uneven, bubble-wrap texture. It looks alarming if you're not expecting it.

This is completely normal. It is not a side effect. It is not an allergic reaction.

The bumps are simply the product sitting just under the skin before it disperses. In most patients, the bumpiness subsides within a few hours to 2–3 days. By day 3, your skin will look completely normal — and the regeneration process will already be underway.

Pro TipTake a photo right after your treatment and again on day 3. The difference will reassure you — and make a great before-and-after reference.

Results timeline: Most patients notice improved texture and radiance within 2–4 weeks, with full results visible at 4–8 weeks. A course of 3–4 sessions spaced 2–4 weeks apart is typically recommended.

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Pain Management

How Much Does It Hurt? — Honest Assessment

Rejuran has a reputation — even among Korean patients — for being one of the more uncomfortable injection treatments. The micro-injections are administered across the entire face, and while numbing cream helps significantly, most patients describe the sensation as noticeable.

01

Rejuran HB PlusContains lidocaine (a local anesthetic) mixed directly into the formula. Same results as standard Rejuran HB but significantly less discomfort. The best choice for pain-sensitive patients.

02

Extended Numbing TimeAsk your clinic to apply numbing cream 40–45 minutes before treatment (rather than the standard 20–30 minutes) for deeper anesthesia.

03

Sedation OptionSome Seoul clinics offer light sedation for particularly sensitive or anxious patients. Mention this during your consultation and ask specifically whether it's available.

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Safety & Regulation

Is Rejuran FDA Approved?

What International Patients Need to Know

Rejuran is approved by Korea's Ministry of Food and Drug Safety (MFDS) — the Korean equivalent of the FDA — and has been used safely in Korean dermatology for over a decade.

The FDA approval process in the US operates differently from Korea's MFDS system, which is why Rejuran isn't currently FDA-approved in the United States. This is not a reflection of its safety or efficacy — it reflects the fact that the two regulatory systems have different approval pathways and timelines.

Rejuran has been administered to millions of patients in Korea over more than ten years, with an excellent safety record. It is a mainstream, regulated medical treatment — not an experimental procedure. Korean dermatologists are among the most experienced administrators of this treatment in the world.

"Rejuran doesn't mask skin problems. It repairs the underlying tissue that causes them."

Is It Right for You?

Who Should (and Shouldn't) Book Rejuran

Yes, if you have

• Dull or uneven skin tone

• Enlarged pores or rough texture

• Fine lines (not deep wrinkles)

• Sensitive or reactive skin

• Sun damage or post-acne scarring

Consider alternatives if

• You want immediate visible volume

• You want instant brightening

• You have deep wrinkles

• You want results within days

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Before You Book

Consultation first — a good Seoul clinic will assess your skin before recommending a formula.

Ask about pain management — mention your sensitivity level and ask about HB Plus or sedation options.

Plan for multiple sessions — one session produces results, but a course produces transformation.

Expect the bumps — they're temporary, they're normal, and they mean the treatment is working.

Avoid sun exposure for at least 1–2 weeks after treatment.

Combine smartly — Rejuran pairs excellently with Pico laser, skin boosters, and LED therapy.