Skin Health
7 Truths About Rejuran That Sound Made Up (But Aren't)
Rejuran became the face of "K-beauty glass skin" almost overnight. Almost nobody actually knows what it is, where it comes from, or what it isn't. Here are 7 truths about Rejuran that sound too strange to be real — and are.
Rejuran is everywhere in Korean beauty conversation — credited with the "glass skin" look, injected into everything from the face to the scalp. What almost nobody explains clearly: what it actually is, where the salmon DNA claim really comes from, and what it genuinely can't do.
Here are 7 truths worth knowing before you book it.
1. "Rejuran" Isn't the Ingredient — It's a Brand Name
This is one of the most common points of confusion in aesthetics right now: polynucleotide (PN), also called PDRN, is the actual ingredient category. Rejuran is simply one branded product within that category — the relationship is closer to "painkillers vs. paracetamol" than two competing things. Other polynucleotide brands exist too; Rejuran just became the household name.
2. It Doesn't "Repair Your DNA" — That's a Genuine Myth
A persistent piece of misinformation claims polynucleotides repair your skin's DNA at a cellular level. They don't edit or repair your own genetic material at all. What they actually do is stimulate fibroblast activity — the cells responsible for producing collagen — through a signaling mechanism, not by altering your DNA in any way.
3. Yes, It's Really Derived From Salmon — And There's a Specific Reason Why
This sounds stranger than it is: salmon DNA is used because it shares high sequence similarity with human DNA, while carrying none of the viral transmission risk associated with mammalian-derived material. The DNA fragments are purified and processed to remove immunogenic proteins — no actual fish protein is injected, just purified DNA fragments engineered to trigger a specific cellular response.
4. It Won't Lift Your Face — And It Was Never Designed To
Unlike HIFU (Ultraformer III) or a surgical facelift, Rejuran doesn't reposition or structurally lift tissue. It works by improving the dermis from within — hydration, elasticity, fibroblast activity — rather than pulling or repositioning skin. If dramatic lifting is the goal, this is the wrong tool for that specific job, regardless of how many sessions you do.
5. The Evidence Base Is Honestly Still Growing — Not Fully Mature Yet
This is the part most marketing glosses over: current 2026 evidence reviews describe polynucleotide research as supported by a real but still modest evidence base — many studies are small (often under 50 participants), predominantly from Korea, and often open-label rather than blinded. The underlying biological mechanism is well-established; the large-scale, rigorously controlled aesthetic trial data is still catching up to the clinical popularity.
6. It Takes Multiple Sessions — And That's Non-Negotiable
Rejuran isn't a one-visit treatment. Standard protocols call for 2–4 sessions, spaced roughly 2–4 weeks apart, with visible improvement building gradually rather than appearing after a single session. Anyone expecting a dramatic one-time transformation is working from the wrong expectation entirely.
7. It's Not Suitable for Everyone — Allergy Screening Genuinely Matters
Because Rejuran is derived from salmon DNA, it's not appropriate for patients with a documented fish or salmon allergy, and it also isn't considered vegetarian-friendly due to its biological origin — a detail worth knowing upfront if either applies to you. Proper screening before treatment isn't a formality here; it's a genuine safety step.
The Real Takeaway
Rejuran is a real, biologically interesting regenerative treatment with a growing (not yet fully mature) evidence base — genuinely good for skin quality, hydration, and texture, genuinely not a substitute for structural lifting or immediate volume correction. Understanding what category it belongs to, and what it's honestly capable of, matters more than the brand name attached to it.
At Matrix Clinic, Rejuran is available under our Fine Lines & Wrinkles and Tired Eyes & Eyebags programmes, assessed individually to determine whether it — alone or combined with another treatment — fits your specific skin goals.
If you're curious how it compares specifically for the under-eye area, see our full breakdown of dark circle treatment options here.
Book a consultation here to find out if Rejuran is the right fit for your skin.
This article is for general educational purposes and does not constitute medical advice. Individual results vary. Individuals with fish or salmon allergies should disclose this during consultation. Individual treatment plans should always be discussed with a qualified physician.
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