If you've been reading up on regenerative injectables, you've probably hit a wall of confusing names: PDRN, polynucleotides, salmon DNA injections, polydeoxyribonucleotide. In the US and Korea, clinics tend to say "PDRN" or "salmon DNA." In the UK and much of Europe, the same conversation happens under the word "polynucleotides." They're closely related — but not identical — and the distinction actually matters for what you inject and what you promise.
This guide clears up the terminology, explains how these DNA-derived treatments work, and sets realistic before-and-after expectations — plus what to look for when sourcing them.
What is PDRN?
PDRN (polydeoxyribonucleotide) is a DNA-derived compound, most commonly extracted and purified from salmon or trout DNA. It's used in aesthetics as a "biostimulator" — rather than filling or freezing anything, it works at the cellular level to help skin repair and rebuild itself.
Its mechanism is well characterized: research on PDRN in skin regeneration shows it acts largely through adenosine A2A receptor activation and a nucleotide "salvage pathway," stimulating fibroblast activity, boosting collagen synthesis, promoting angiogenesis (new micro-vessels), and calming inflammation. In plain terms: it nudges the skin's own machinery toward regeneration.
That's why PDRN shows up across so many indications — general skin rejuvenation, under-eye quality, acne-scar recovery, hair restoration, and post-procedure healing.
What are polynucleotides — and how are they different from PDRN?
Here's the part most articles gloss over. Polynucleotides (PN) and PDRN are both DNA-derived, phosphodiester-bonded nucleotide polymers — same family, same DNA backbone. The practical difference comes down to chain length and emphasis.
A dermatology review comparing PN and PDRN describes PDRN as made of relatively shorter oligonucleotide fragments, giving it a more targeted regenerative and repair action via those adenosine receptors. Polynucleotides are generally longer chains that behave more like a hydrating, structural scaffold in the dermis — offering broader, longer-lasting biorevitalization and a stronger collagen-stimulating effect.
A useful way to hold it in your head:
PDRN → targeted repair and regeneration (great for damaged, tired, healing skin).
PN → structural support and hydration (great for overall skin-quality lift and firmness).
Neither is "better" — they're tuned differently. Many modern protocols use them for overlapping goals, and formulas increasingly combine PDRN with HA for a hydration-plus-repair effect.
Under-eye rejuvenation. "Polynucleotide under eyes" is one of the fastest-growing requests in the UK for a reason — the thin, crepey under-eye area responds well to a biostimulator that improves skin quality rather than adding volume.
Overall skin quality — texture, elasticity, glow, fine lines — usually across a course of sessions.
Acne scars and post-procedure recovery, where PDRN's repair signaling is especially relevant.
Hair and scalp support, often as a mesotherapy add-on.
Before and after: what results are realistic?
Managing expectations is where good clinics win. Unlike a filler, you won't see a dramatic "instant" change — this is a gradual, cumulative treatment. Most patients need a course of 2–3+ sessions spaced a few weeks apart, with skin quality continuing to improve for weeks after as collagen remodels.
Typical before-and-after progression:
After session 1: subtle hydration and "freshness"; little visible change yet.
Across sessions 2–3: improved texture, more even tone, softer fine lines, firmer under-eye skin.
Weeks after the final session: the fuller effect as collagen synthesis catches up.
An honest note for patient trust: while mechanistic and early clinical evidence is strong, large randomized trials are still limited, so results vary with the individual, the formula's quality, and injection technique. Under-promise, over-deliver.
Delivery: injection, mesotherapy, and microneedling
PDRN and PN can be delivered several ways. Precise intradermal micro-injections (including mesotherapy) are standard for face and under-eye work. Microneedling with PDRN — applying a PDRN solution alongside or after microneedling — is a popular lower-cost, lower-downtime protocol that pairs the channel-creation of needling with PDRN's repair signaling. Whichever route, the active in the vial is what determines the outcome.
The variable that decides everything: PDRN quality
Because these are regenerative actives working at the cellular level, purity and concentration are not negotiable. Low-grade, under-purified PDRN is the fastest way to inconsistent results and unhappy patients.
This is a manufacturing question. AOMA's PDRN mesotherapy solutions are formulated with purified salmon-DNA PDRN and sealed in medical-grade borosilicate glass ampoules to protect the active. They're also designed to be layered — for example, mixing PDRN with an 8% hyaluronic acid skin-rejuvenation solution to combine repair with deep hydration in a single protocol. Built on 20+ years of dedicated mesotherapy manufacturing with CE, ISO and SGS certification, the range is aimed at the visible, session-over-session results clinics rely on.
Sourcing PDRN for your clinic or brand
PDRN and polynucleotides are one of the hottest categories in aesthetics right now — which makes them a strong addition to a treatment menu or a private-label line. As an OEM/ODM manufacturer, AOMA can customize PDRN formulas, concentration, packaging, and branding, so a clinic chain, distributor, or brand can launch a regenerative line under its own name rather than reselling generic vials.
Is PDRN the same as polynucleotides? Not exactly. Both are DNA-derived injectables from the same family, but PDRN uses shorter fragments for targeted repair, while polynucleotides are longer chains that give broader, more structural rejuvenation. The terms are often used loosely — "PDRN" is more common in the US and Korea, "polynucleotides" in the UK and Europe.
Is PDRN a salmon DNA injection? Yes — PDRN is typically purified from salmon or trout DNA. "Salmon DNA injection" is a common consumer name for it.
Does PDRN work under the eyes? It's one of the most popular uses. PDRN and polynucleotides improve the quality of thin under-eye skin — texture, firmness, tone — rather than filling hollows the way a filler does.
Can you use PDRN with microneedling? Yes. Microneedling with PDRN is a well-established combination, pairing the micro-channels from needling with PDRN's regenerative signaling for a lower-downtime treatment.
How many sessions until I see results? Most protocols run 2–3+ sessions a few weeks apart, with skin quality improving gradually and continuing to build for weeks after the last session.
Dr. Emily Carter (MD, Fellow of the American Academy of Dermatology) is a board-certified cosmetic surgeon in New York City with over 9 years of specialized experience in hyaluronic acid fillers, acne scar treatment, and minimally invasive facial contouring. She is particularly recognized for her expertise in advanced injectable therapies that effectively lighten acne scars, promote skin healing, and restore smoothness through targeted skin repair injection and skin booster techniques.
