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PDRN vs Glycerin: Which One Actually Suits Your Skin? (NZ Guide)
Two ingredients, one question: which does what for the look of your skin, and do you need both? Here is glycerin (glycerol, the workhorse humectant) beside PDRN, plainly.
| PDRN | Glycerin | |
|---|---|---|
| What it is | PDRN is polydeoxyribonucleotide: DNA cut into short fragments, in skincare almost always from salmon. It arrived in Korean skincare and is now on New Zealand shelves in serums and ampoules. | One of the oldest and most reliable moisturising ingredients there is. It draws water to the surface of skin and holds it there, and it is in almost every serum and cream, including most PDRN serums. |
| What it is for | A PDRN serum is used for the look of plumper, more hydrated, smoother skin. The visible part is hydration: a well made PDRN serum sits on a humectant base and skin looks fuller while you use it. | Skin looks plumper and more hydrated within minutes. It is the ingredient doing a lot of the quiet work in products that get the credit for other things. |
| How it feels | Watery, light, settles in about a minute. It is the kind of serum that suits a roller. | Slightly tacky at high concentrations, unnoticeable at normal ones. |
| When to use it | Night, on clean dry skin, most nights. | Every product, every day, whether you noticed or not. |
What glycerin is
One of the oldest and most reliable moisturising ingredients there is. It draws water to the surface of skin and holds it there, and it is in almost every serum and cream, including most PDRN serums.
What glycerin does for the look of skin
Skin looks plumper and more hydrated within minutes. It is the ingredient doing a lot of the quiet work in products that get the credit for other things.
PDRN, briefly
PDRN is polydeoxyribonucleotide: DNA cut into short fragments, in skincare almost always from salmon. It arrived in Korean skincare and is now on New Zealand shelves in serums and ampoules. A PDRN serum is used for the look of plumper, more hydrated, smoother skin. The visible part is hydration: a well made PDRN serum sits on a humectant base and skin looks fuller while you use it.
Using them together
You are almost certainly already using them together. Glycerin is the base most PDRN serums are built on, which is why a PDRN serum leaves skin looking plumper straight away.
Which to pick
This is not really a choice. Glycerin is the hydration; PDRN is the headline ingredient carried in it. If you want cheap, reliable hydration and nothing else, a plain glycerin serum is honest value. If you want the PDRN itself, check that the serum you buy has glycerin high on the list too.
Questions people ask
Why does a PDRN serum list glycerin second?
Because glycerin is what makes the serum hydrating and gives it its texture. PDRN is the ingredient the product is named for; glycerin is what carries it.
Is glycerin enough on its own?
For the look of hydration, often yes. It is why the most honest budget serums are mostly glycerin and water.
Where Silka fits
Silka is a PDRN serum with a microneedle roller head on the bottle, made and shipped from New Zealand. The roller is the most practical way we know to put PDRN on every night: the head spreads the serum evenly across face and neck, nothing is left behind in your palm, and the whole routine takes about a minute, which is the part that makes a habit last.