PDRN vs Polynucleotides in Skincare: What Is the Difference?
June 17, 2026 · NUCLEORA
PDRN (polydeoxyribonucleotide) and polynucleotides are closely related terms that describe overlapping ingredient categories. PDRN is a specific subtype of polynucleotide — a double-stranded DNA fragment derived most commonly from salmon. The term "polynucleotides" is broader, covering a range of nucleotide-chain materials from various sources and molecular weights.
As both terms appear more frequently in skincare marketing, understanding the distinction helps when comparing products and reading ingredient lists.
Starting With the Basics: What Are Nucleotides?
Nucleotides are the building blocks of DNA and RNA. When nucleotides link together in a chain, they form polynucleotides. That chain is the unit of structure in both DNA (deoxyribonucleic acid) and RNA (ribonucleic acid).
In a cosmetic context:
- Polynucleotides is the umbrella term for any nucleotide chain — DNA-derived or RNA-derived, from any biological source, across a range of chain lengths.
- PDRN (polydeoxyribonucleotide) is a specific form: double-stranded DNA fragments, typically salmon-derived, in a specific molecular weight range, listed on cosmetic labels as Sodium DNA.
All PDRN is a type of polynucleotide. Not all polynucleotides are PDRN.
Where the Terms Differ
Source
PDRN — the kind that appears in serums as Sodium DNA — is most commonly extracted from salmon (milt or testes). This is the material with the longest track record in both injectable aesthetic contexts and topical K-beauty formulations.
Other polynucleotide ingredients can come from different biological sources. Some are RNA-derived rather than DNA-derived. Some use biotechnology-derived or plant-derived nucleotide chains rather than animal-derived ones. The source determines the INCI name that appears on the label.
Molecular weight
Molecular weight affects how an ingredient interacts with the skin surface. PDRN for cosmetic use spans a range of molecular weights. Some formulations use shorter-chain fractions for different surface characteristics; others use longer, intact chains. A brand's ingredient dossier or transparency note will clarify the molecular weight specification if they choose to share it.
INCI name
Because INCI names are standardised by ingredient structure, different polynucleotide types carry different INCI labels:
| Material | Common INCI name |
|---|---|
| Salmon-derived PDRN (intact fragments) | Sodium DNA |
| Hydrolysed (shorter-chain) PDRN | Hydrolyzed DNA |
| RNA-derived polynucleotides | Sodium RNA / Hydrolyzed RNA (depending on processing) |
If a product says "polynucleotides" in marketing but the INCI list reads Sodium DNA, it contains PDRN in the salmon-derived sense.
Why the Two Terms Are Often Used Together
PDRN had its earliest cosmetic visibility through Korean aesthetic medicine, where it was studied in injectable forms. "PDRN" became the shorthand that K-beauty brands adopted when translating the ingredient into topical formats.
"Polynucleotides" is the broader scientific term that has subsequently entered the conversation as the ingredient category gained attention beyond Korea — particularly in European and North American markets. The two terms often describe the same ingredient in the same product; the naming reflects which audience or framing a brand is speaking to.
Neither term on its own tells you concentration, source, or molecular weight. Those require reading the full ingredient list and, ideally, the brand's ingredient transparency notes.
What Topical PDRN and Polynucleotides Can — and Cannot — Claim
This distinction matters most when you see marketing language that sounds more clinical than cosmetic.
PDRN has a research history in injectable aesthetic medicine. Those injectable findings do not translate directly to a leave-on topical product. The delivery mechanism, the concentration at the target tissue, and the regulatory context are all different.
In Canadian cosmetic regulation, a leave-on topical serum that contains Sodium DNA (PDRN) may make appearance, hydration, and comfort claims. It may not make drug-territory claims about changing the skin's underlying biology, regardless of how compelling the injectable literature is. Those would fall under the Food and Drugs Act.
What a well-formulated PDRN serum can claim, when the evidence and regulation align:
- Hydrates the skin
- Visibly plumper-looking skin
- Smoother skin appearance
- Supports the look of a healthy skin barrier
- Boosts the appearance of radiance (in conjunction with supporting actives)
- Formulated for sensitive skin
These are the claims NUCLEORA makes. They are substantiated by the hydration mechanism of the multi-humectant matrix and the appearance benefits of the full formulation — not by injectable clinical outcomes transplanted into topical marketing.
Comparing Products: What to Look For
When you are comparing a PDRN serum to a product marketed as "polynucleotide serum," a few practical questions help:
- What is the INCI name? Sodium DNA = PDRN (salmon-derived, typical). Hydrolyzed DNA = shorter-chain variant. Sodium RNA = RNA-derived polynucleotide, a different material.
- What is the stated concentration? "1% PDRN" typically means 1% raw-material input; effective polynucleotide active will be slightly lower depending on the supplier's active specification (typically 84–95%).
- What is the supporting formulation? A Sodium DNA serum with no additional humectants is relying entirely on one active. A multi-humectant matrix — Sodium Hyaluronate, Beta-Glucan, Glycerin, Panthenol — provides a more complete hydration story.
- Are the claims cosmetic or drug-territory? Claims that a leave-on product changes the skin's underlying biology are drug claims under Canadian regulation. A reputable cosmetic brand stays within appearance and hydration language.
NUCLEORA's Position in This Category
NUCLEORA PDRN Radiance Serum uses Sodium DNA — salmon-derived PDRN — at 1% raw-material input, formulated in a multi-humectant matrix alongside Niacinamide, Ceramide EOP, and 3-O-Ethyl Ascorbic Acid. It is a Canadian brand's interpretation of the K-beauty PDRN serum format: fragrance-free, formulated for sensitive skin, with transparent concentration disclosure.
It is a cosmetic. It makes cosmetic claims. The distinction is deliberate.
Explore the full formulation on the product page, or start with the foundational articles below.
Related Reading
- What Is PDRN in Skincare? The Sodium DNA Ingredient Explained — if you are new to the ingredient, start here.
- Sodium DNA in Skincare: The INCI Name Behind PDRN — a closer look at how Sodium DNA appears on labels and what it does in a topical formulation.
- NUCLEORA PDRN Radiance Serum — the product, formulated.
Frequently Asked Questions
What is the difference between PDRN and polynucleotides?
PDRN is a specific type of polynucleotide — a double-stranded DNA fragment, typically salmon-derived, listed on cosmetic labels as Sodium DNA. Polynucleotides is the broader category, covering DNA-derived, RNA-derived, and other nucleotide-chain materials from various sources. All PDRN is a polynucleotide; not all polynucleotides are PDRN.
Which is better for skin — PDRN or polynucleotides?
This is not a straightforward comparison because the terms are not equivalent in specificity. PDRN (Sodium DNA) is the most studied polynucleotide material in topical K-beauty and aesthetic contexts. Whether a different polynucleotide material is "better" depends on source, molecular weight, concentration, and the supporting formulation — none of which the marketing terms alone can tell you.
Do PDRN and polynucleotide serums make the same claims?
Reputable brands in both categories stay within cosmetic scope: hydration, appearance of radiance, smoother skin appearance. Claims that enter drug territory — anything about changing the skin's underlying biology — are not legally permissible for leave-on cosmetics in Canada, regardless of what the injectable literature says.
Is PDRN the same as Sodium DNA?
Yes. Sodium DNA is the INCI-standardised name for PDRN in its cosmetic salt form. When a product's marketing says "PDRN," the ingredient list will read "Sodium DNA."
Why do some products say PDRN and others say polynucleotides?
Often the two terms refer to the same material. "PDRN" reflects the Korean aesthetic medicine origin of the ingredient; "polynucleotides" is the more scientific-sounding alternative that gained traction as the category expanded into European and North American markets. Always check the INCI list for the precise ingredient and name.
Questions or concerns: safety@nucleoraskin.com