Glow Journal · The Weird Ingredient Report
Why Women Are Putting Salmon DNA On Their Faces (And Why Seoul Did It First)
It sounds like a prank. It is one of the most talked about skin ingredients in Korea. Here is the strange, true story of salmon PDRN.
Updated September 2026 · 5 min read
Picture a skin clinic in Gangnam. Marble floors. Soft lighting. A menu of treatments that costs more than your rent.
And near the top of that menu, one of the most requested ingredients comes from salmon.
Not salmon oil. Not omega 3s. Salmon DNA.
And yes, it comes from exactly the part of the salmon you are now trying not to think about.
When it went viral, the internet laughed. Seoul didn't. Seoul had been using it for years.
The ingredient is called PDRN. And once you understand why it works the way it does, and why it has to come from salmon, the joke stops being funny and starts being very interesting.
The treatment people book before weddings
In Korean clinics, salmon PDRN is usually injected. It is one of the treatments known as "skin boosters", and people book them before weddings, big events, or simply when their skin starts looking more tired than they feel.
The appeal is not a dramatic change. It is the opposite. Skin that looks rested, bouncy and quietly healthy, like you slept eight hours and drank your water for a month.
The catch? Injections mean needles, a practitioner, and a bill that is usually several hundred dollars a session.
Which raises the obvious question. What is it about salmon DNA that makes people willing to go through all that?
So what does salmon DNA actually do for skin?
PDRN stands for polydeoxyribonucleotide. Ignore the tongue twister. It simply means purified fragments of DNA. On an ingredient list you will see it as Sodium DNA.
It started out far away from beauty. Italian researchers first studied it in medical settings, looking at tissue repair. What caught their attention was how it seems to work with the body's own renewal process rather than just sitting on top.
Here is the simplest way to picture it.
Your skin is constantly rebuilding itself. Old cells out, new cells in. To build, cells need raw materials. DNA fragments break down into those raw materials, which cells can reuse instead of making from scratch.
Researchers also found PDRN interacts with a receptor on skin cells (called A2A) that is linked to calming the skin and supporting its natural repair response.
That is why it matters most where skin is tired, thin and slow to bounce back. Which, for most of us, means the face after 30. And especially under the eyes.
But why salmon? Why not anything else?
This is the part nobody explains. There are three reasons, and none of them are a marketing gimmick.
- It is one of nature's richest sources of DNA.Salmon reproductive cells are packed with it. So packed that "salmon sperm DNA" has been a standard material in science labs for decades, long before anyone thought to put it on a face.
- It can be purified to an exceptionally high standard.The raw material is stripped of proteins and everything else, leaving clean DNA fragments behind. That purity is the whole point, and it is why salmon is the source used in clinical skincare.
- It is usually a by product, not a harvest.Salmon are not raised for their DNA. The material is typically recovered from fish already caught or raised for food, so a part that would be thrown away gets used instead.
So the weird part is actually the smart part. If you want the cleanest DNA nature offers, you go to salmon.
The part most brands won't tell you
A mask is not an injection. Injected PDRN goes directly into the skin. On the surface, it works with what your skin takes in. Anyone promising clinic results from a mask is overselling it.
What topical salmon PDRN is used for is supporting hydration, comfort and a smoother, more rested looking complexion. And because it needs time on the skin, the format matters just as much as the ingredient.
The problem with most PDRN products
Once PDRN started trending, it showed up everywhere. Cleansers. Toners. Serums you rub in and forget about.
Think about that for a second. A cleanser is on your face for about 30 seconds before it goes down the drain. If an ingredient needs time in contact with your skin, a rinse off product is barely saying hello.
That is why Glow puts salmon PDRN into two formats built to do one thing: hold it against your skin for as long as possible.
For the whole face: a soaked sheet mask
The Salmon PDRN Collagen Mask carries 24g of concentrated essence. Alongside salmon PDRN it has low molecular weight collagen, niacinamide and hyaluronic acid. It is made to support hydration and skin comfort, improve the look of dullness and uneven tone, and leave skin soft, dewy and refreshed.
It is the one people reach for the night before something that matters. Or any night their skin looks as tired as they feel.
For the under eyes: a hydrogel patch that stays put
The PDRN Peptide Eye Masks press flat under the eye and stay there, for 20 minutes or all night. Alongside salmon PDRN they carry Acetyl Hexapeptide 8 for the look of fine lines, caffeine for the look of morning puffiness, niacinamide for brightness and sodium hyaluronate for hydration.
Two to three times a week gives the thinnest skin on your face a treatment of its own.
Both are made by Glow's Korean manufacturing partner, the same lab behind the Glow Bio Collagen Mask, a mask with more than 12,000 customer reviews.
The questions everyone asks
Does it smell fishy?
No. After purification there is no smell and no fish oil. It is a clear, water soluble ingredient.
Is it vegan?
No, and we would rather tell you upfront. If you avoid animal derived ingredients, PDRN is not for you.
I have a seafood allergy. Can I use it?
Purification removes the proteins most commonly linked to reactions, but please speak to your doctor first if you have a fish or seafood allergy. Patch test any new product.
How long until I see a difference?
The hydrating and refreshing effects show from the first use. PDRN is the long game, so give it a few weeks of consistent use to judge it properly.
Try salmon PDRN at home
No needles. No clinic. Two ways to start.
Pick the one that matches your concern, or use both.
PDRN Peptide Eye Masks
For tired, puffy looking under eyes. Wear for 20 minutes or overnight.
- Salmon PDRN + peptide
- Caffeine for the look of puffiness
- Niacinamide for brighter looking eyes
Salmon PDRN Collagen Mask
For dull, tired looking skin. 24g of concentrated essence in every mask.
- Salmon PDRN + low molecular weight collagen
- Niacinamide for the look of uneven tone
- Hyaluronic acid for hydration