Type any of these into a search bar — pdrn, what is polynucleotide, what is a salmon sperm facial, rejuran salmon dna — and you're circling the same thing from four directions without realizing it. The names come from chemistry, marketing, a viral nickname, and a brand, and nobody stitched them together for you. Here's what each word actually means, and why the labels collapsed into one confusing pile. We're explaining the vocabulary, not what it does to your skin — that's a consultation question, not a marketing one.
They all start as salmon DNA. PDRN and PN are both molecules derived from salmon DNA: the DNA is extracted, purified, and cut into pieces, leaving a chain of nucleotides — DNA's building blocks. So "PDRN," "polynucleotide," and "salmon DNA" aren't three different products. They're three ways of naming fragments of the same source material — words for what the molecule is and where it comes from, not for a result.
PDRN vs polynucleotide (PN): the marketed difference is fragment length. The distinction the industry draws:
- PDRN (polydeoxyribonucleotide) — marketed as the shorter fragments.
- PN (polynucleotide) — marketed as the longer chains.
Same salmon-DNA origin, described by fragment size. That's the whole technical difference you'll see cited on menus and product pages. Whether that length distinction changes anything you'd notice is a clinical question we don't answer — see below.
Why Rejuran is the reason everyone's confused. Rejuran, made by the Korean company PharmaResearch, is the brand most foreigners have heard of — and it's exactly where the neat PDRN-vs-PN split falls apart. In Korea, the injectable Rejuran line is marketed as PN. But PharmaResearch's retail cosmetics line brands itself "c-PDRN," and international retail files it the other way — Sephora lists Rejuran products under PDRN. One company, one salmon-DNA platform, both labels, depending on the shelf. If you've seen Rejuran called PN in one place and PDRN in another and assumed those were two different things, they weren't. That single brand straddling both words is most of the internet's confusion in one tidy example.
"Salmon sperm facial" is the same thing with a viral nickname. The Western internet nickname sounds like a separate, exotic treatment; it isn't. The DNA in this category is sourced from salmon milt — the fish's reproductive cells — which is where the name comes from. When Western media and celebrities started talking about a "salmon sperm facial," they were describing the same salmon-DNA category Korean clinics have listed for years as PDRN, PN, and Rejuran.
One that is NOT in this family: Juvelook. Because it trends in the same searches and sits next to Rejuran on menus, people lump Juvelook in — don't. Juvelook is PDLLA (poly-D,L-lactic acid), a synthetic material marketed as a "collagen stimulator" — a different category with a different origin and a different marketing story. It is not a salmon-DNA product. If a quote mentions "Juvelook," you've stepped out of the PDRN/PN category entirely.
What we won't tell you — on purpose. Whether any of this "repairs," "heals," or does anything at all — and whether shorter fragments differ from longer ones in any way you'd feel — are medical questions with real individual variation. Comparative claims are exactly the marketing this site refuses to make. What each word does in your skin belongs in the consultation room, with a doctor who has examined you. What we can do is stop you from thinking four search terms are four different treatments.
What you can do before you go:
- Know it's one category. PDRN, PN, salmon DNA, and Rejuran point at the same family; "salmon sperm facial" is the nickname for it.
- Ask which formulation a quote is for — the specific brand (Rejuran and others exist), and whether it's being sold to you as PDRN or PN.
- See prices as posted. Our Rejuran / salmon-DNA treatment page shows prices advertised on clinics' own sites, with the source noted on each profile.
SKINAVI lists factual information only and is not a booking agent — you always contact the clinic directly.