PDRN started as a clinic injection in Korea and is now in serums and sheet masks. What it is, what the research supports, and why a cream isn't the same as a needle.
In Korea, PDRN first became famous in dermatology clinics, where it's injected into the skin. Patients nicknamed it the "salmon injection" (연어 주사, yeoneo jusa). Then, as tends to happen, the trend jumped from clinics onto store shelves. Now you'll find "PDRN" on serums, creams, pads and sheet masks.
I'm not against trying it. But I think it's worth being clear about what a bottle of PDRN serum can and can't be expected to do.
PDRN = polydeoxyribonucleotide. It's a mixture of DNA fragments, usually extracted and purified from salmon or trout sperm cells. The purification is meant to remove proteins and other material, leaving fragments considered compatible with human tissue.
You may also see PN (polynucleotide), which refers to longer DNA chains. Some clinic products use PN rather than PDRN. On ingredient lists, PDRN often appears as sodium DNA.
PDRN was studied in medicine before skincare, mainly for wound healing and tissue repair. Research suggests it may:
One proposed mechanism involves the adenosine A2A receptor, which is involved in repair and inflammation.
Interesting stuff. The catch is that most of this evidence is about PDRN injected or used in medical settings, not rubbed onto intact skin.
| Injection in a clinic | Serum or cream at home | |
|---|---|---|
| How it gets there | Placed directly into the skin | Sits on the surface |
| Research | More clinical studies | Limited independent research |
| Dose | Controlled | Often not disclosed |
| Realistic result | Can be noticeable | Usually subtle |
DNA fragments are relatively large, and the skin barrier exists specifically to keep things out. So a topical PDRN product is unlikely to do what an injection does.
That doesn't make topical PDRN useless. Many of these formulas also include proven hydrating and soothing ingredients like panthenol, hyaluronic acid, peptides or niacinamide. A lot of the pleasant results people notice probably come from the formula as a whole.
It slots in like any serum: cleanser, toner, PDRN serum, moisturizer, sunscreen in the morning. It's generally considered gentle and combines with niacinamide, hyaluronic acid and peptides. If you use retinoids or acids, introduce one new thing at a time.
PDRN has real medical science behind it, but most of that science involves a needle. As a skincare ingredient, it's a pleasant extra, not a breakthrough. Make sure your basics are covered first: gentle cleansing, moisturizer and daily sunscreen. Then, if you're curious and it fits your budget, go ahead and try one.
For gentler, cheaper ways to support recovering skin, see the centella guide.
Aran is Korean, lives in Canada, and reads Korean labels and research so you don't have to. About Aran · How I write these guides