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What Is PDRN? The Salmon DNA Skincare Ingredient Trending in NZ Right Now
PDRN is on more labels every month and almost none of them say what it is. Here is the short, honest version: what the word means, where the ingredient comes from, and what a serum with it in can fairly claim about your skin.
The word
PDRN is short for polydeoxyribonucleotide, which is easier than it looks once it is taken apart. Nucleotides are the building blocks of DNA. Poly means many of them joined in a chain. Deoxyribo tells you it is the DNA kind rather than the RNA kind. So PDRN is DNA, cut into short pieces. That is the whole of what the word means, and nothing about it is mysterious.
Where it comes from
Usually from salmon, sometimes from trout. The DNA is taken from the fish, purified so that proteins and other material are removed, and broken into fragments within a set range of sizes. That is why the words salmon DNA turn up beside PDRN on labels: they are two names for the same ingredient, one for the ingredient list and one for the front of the box.
How it ended up in a serum
PDRN was first used by doctors, in forms that are injected, in a handful of countries. That use is a medicine: prescribed, given by a doctor, and approved as a medicine before anybody may sell it as one. It is a different product from anything in a bottle on a shelf. The version in a serum is the same ingredient sitting on the surface of the skin. Skincare borrowed the ingredient and, very often, the language that came with it. The ingredient may travel across. The language should not, and when you see hospital words on a serum page it is the page that is overreaching, not the ingredient.
What a serum with PDRN can honestly say
A cosmetic works on the surface and changes how skin looks and feels. So a PDRN serum can say that skin looks plumper. That the surface looks smoother. That skin looks and feels more hydrated while you are using it. Those are appearance claims, every one of them is checkable in a mirror, and none of them asks you to take anything on faith. PDRN is a large molecule that holds water, and on the surface of skin that is exactly the job it does.
What it cannot say
That it changes the structure of your skin. That it reverses anything. That it does in a serum what the injected form is used for by doctors. In New Zealand a seller needs evidence in hand before making a claim like that, not after, and a cosmetic that could honestly make it would have had to be approved as a medicine first. When a page attaches a number to your face, a count of days or years or a figure with a sign after it, that is the loudest warning there is.
Reading a PDRN label
Three quick checks. First, where PDRN sits in the ingredient list, because lists run from most to least and a hero ingredient near the bottom is there for the front of the box. Second, the verbs: looks, appears and feels are fair, and anything stronger is a claim about changing your skin. Third, whether the page has published the list at all. Pink, by the way, is a colour and not an ingredient. It tells you the shade of the serum and nothing about how much PDRN is in it.
Is it right for you
It comes from an animal, so it is not vegan. It comes from fish, so if you have a fish allergy ask a pharmacist before using it and patch test a small area first. Patch test anyway, the way you would with any new product. Anyone seeing a doctor about their skin should ask them first, and follow their answer over anything a product page says.
Where Silka fits
Silka is a PDRN serum with a microneedle roller head on the bottle, used nightly on a clean face, for the look of plumper, smoother, more hydrated skin. That is the promise and it stops there. The rest of this site is written to the same line, and if a page of ours ever drifts past it, this is the page to hold us to.