Quick answer: If a PDRN skincare product’s label says it’s meant for daily use, you can use it that way. But the ingredient name “PDRN” alone doesn’t tell you whether every product is suitable for daily use or how effective it is. Injection and skin-booster research uses a different delivery method than a product you apply to skin, so choose a cosmetic based on its finished formula, its directions for use, and how your own skin responds.
Search for a PDRN ampoule and you’ll see words like “high-concentration,” “salmon PDRN,” and “plant-derived PDRN” all at once, often alongside exaggerated claims. You might also wonder whether it’s safe to use every day, or why “PDRN” doesn’t actually appear on the ingredient list.
This guide goes a step further than explaining what PDRN is, to cover what to actually check before buying a PDRN product. We’ll walk through SKIN9HARI’s own rice-derived PDRN, sourced from Icheon, Korea, using the same standard.
What is PDRN?
PDRN stands for polydeoxyribonucleotide — a mixture of relatively short fragments of DNA chains. On a cosmetic ingredient list, it may appear as Sodium DNA, depending on the product.
PDRN and PN (polynucleotide) are sometimes used interchangeably in the market and in literature, but their molecular size and definitions aren’t always identical. A 2025 review noted that the two terms are used inconsistently across the literature, creating confusion. So the fact that “PDRN” appears on a product’s front label doesn’t mean every such ingredient and formula is the same thing.
PDRN injections and PDRN skincare don’t share the same evidence
Most human research on PDRN and PN to date has been concentrated in injection and aesthetic-procedure settings. A systematic review covering studies from 2010 to 2024 included 9 studies and 219 participants total, reporting promising signals, but rated the quality of the underlying studies as low to moderate and noted a lack of consensus on optimal use. A 2026 systematic review of 7 randomized trials (183 participants) also found that most studies used injections or in-office procedures, and the methods varied too much to pool the results into a single estimate.
An injection delivers material beneath the skin; a cosmetic is applied to intact skin on the surface. When the delivery route differs, what you can reasonably expect — and the safety questions that matter — differ too, even under the same ingredient name.
| Category | How it’s delivered | What to check in the content |
|---|---|---|
| PDRN/PN injections or skin boosters | Delivered beneath the skin in a medical setting | Don’t read these results as cosmetic results |
| PDRN-containing ampoules and creams | Finished cosmetics applied to the skin’s surface | Check the finished formula, directions, and product testing |
| PDRN-containing cleansers | Applied, then rinsed off with water | Don’t apply the same expectations as a leave-on ampoule |
| Plant-derived PDRN raw material | A processed ingredient sourced from plant DNA | Separate sourcing/manufacturing facts from finished-product results |
Small studies applying low-molecular-weight, plant-derived PDRN directly to skin have started to appear more recently. That said, one early study applied a specific peony-derived ingredient to just 10 people — its results can’t be extended to a rice-derived ingredient or to PDRN skincare in general.
Is it okay to use PDRN skincare every day?
If a product’s directions say to use it daily, you can. That said, rather than adding several PDRN products and exfoliating products all at once from day one, starting with one product in a small amount and watching how your skin responds makes it easier to isolate a cause.
If it’s a new PDRN product for you, try it on one spot on your inner arm before using it on your whole face. Apply it twice a day for about 7–10 days and watch for redness, itching, or swelling. This screens out a poor match early — it isn’t a way to measure what PDRN does.
If stinging, itching, redness, or swelling continues, stop using the product. If the reaction is severe or doesn’t settle down, see a dermatologist.
Five things to check before buying PDRN skincare
1. First, tell injection research apart from cosmetic research
Check whether the study a listing cites was done with an injection or with a topical cosmetic. A result observed in PDRN injection research doesn’t mean “this ampoule will give you the same result.”
2. Check the ingredient’s source
PDRN is best known as an animal-derived ingredient sourced from salmon species, but plant-derived options — using DNA processed from plants — have also emerged. Plant-derived PDRN can be a sourcing option for shoppers looking for vegan ingredients.
That said, the word plant-derived doesn’t mean higher effectiveness or that nobody could have an allergic reaction to it. The clearest difference between salmon- and plant-derived PDRN is where the raw material comes from and how it’s processed — which one performs better can’t be determined without a head-to-head finished-product comparison under the same conditions.
3. Look for Sodium DNA in the full ingredient list
Even if “PDRN” appears on the front of the package, the ingredient list may show Sodium DNA instead of PDRN. Check for this name before assuming the ingredient isn’t there.
Different raw materials — rice-derived and centella-derived, for example — can share the same INCI name, Sodium DNA, and appear as a single line in the ingredient list. If you want to know the actual source, check the brand’s ingredient explanation alongside the ingredient list.
4. Check what a percentage actually refers to, rather than trusting “high-concentration”
The amount of raw material added and the amount of Sodium DNA in the finished product aren’t necessarily the same number. A complex ingredient that contains PDRN is usually mostly other components, so its input percentage isn’t the Sodium DNA content of the finished product.
If a number is listed, check whether it refers to the raw material added or the actual ingredient concentration. A larger number alone isn’t enough evidence that a product performs better.
5. Look at the finished formula, not just the PDRN
Even with the same PDRN ingredient, an ampoule, a cream, and a cleanser are used differently. Other ingredients formulated alongside it — fragrance, ethanol, acids, moisturizing agents — can also affect how a product feels and how skin responds.
If a finished-product skin test exists, check which specific product and formula was tested. Don’t treat results from a pre-renewal formula or from raw-material testing as if they apply to the product sold today.
What’s the difference between salmon-derived and plant-derived PDRN?
| What to check | Salmon-derived PDRN | Plant-derived PDRN |
|---|---|---|
| Source | Primarily DNA sourced from salmon species | DNA sourced from plants such as rice, centella, or peony |
| Vegan sourcing | Generally not, since it’s animal-derived | Can be a vegan sourcing option, depending on manufacturing and certification |
| Research base | Relatively more research in medical/injection settings | Cosmetic-ingredient research is still emerging |
| Ingredient list | May appear as Sodium DNA | May appear as Sodium DNA |
| Limits to keep in mind | Don’t extend injection research to a cosmetic | Don’t extend a different plant ingredient’s research to this product |
Being plant-derived explains a difference in sourcing — it isn’t a conclusion about finished-product performance. When comparing, look beyond source to formula, directions, co-formulated ingredients, and finished-product testing.
How is SKIN9HARI’s Icheon rice-derived PDRN listed?
According to SKIN9HARI’s current ingredient documentation, RICE-P PDRN is a plant-derived PDRN sourced from rice grown in Icheon, Gyeonggi Province, Korea. On the full ingredient list, it appears as Sodium DNA.
This ingredient is tied to a registered Korean patent, No. 10-2682938, covering a manufacturing process for producing PDRN from plant material. The patent covers a method for obtaining DNA from plant material and fragmenting it into PDRN. Having a patent describes the scope of the manufacturing method — it isn’t a study showing a skin effect from any finished SKIN9HARI product.
Based on current renewal-formula documentation, the products it’s used in are as follows.
| Product | PDRN-related facts | What to also check |
|---|---|---|
| N.F Ampoule | Contains Icheon rice-derived RICE-P PDRN | Formulated with 0.5% panthenol and 1.0% betaine. Free of fragrance, ethanol, dye, and silicone. Irritation patch-tested (24-hour patch test, 33 adults). Not described as “high-concentration PDRN.” |
| N.F Cream | Uses both rice-derived and centella-derived PDRN ingredients | Formulated with 4 ceramides, 5 types of hyaluronic acid, and plant-derived squalane. Both PDRN sources may appear as Sodium DNA on the ingredient list. |
| A.C Cleanser | Uses rice- and centella-derived plant PDRN ingredients | A rinse-off product, so it isn’t described the way a leave-on ampoule is. The current formula is not registered for any acne-related functional claim. |
This product information describes sourcing and formulation facts only. SKIN9HARI doesn’t attach effect claims to PDRN, and doesn’t extend one product’s test results to another product.
Where does a PDRN ampoule fit in your routine?
Here’s a general routine order.
- Morning: Cleanse → toner (optional) → PDRN ampoule → cream → sunscreen
- Evening: Remove makeup/sunscreen → cleanse → toner (optional) → PDRN ampoule → cream
Toner is not a required step. If you’re using a prescription acne medication or another functional product with its own directions, follow your doctor’s and the product label’s instructions ahead of a general skincare order.
It’s fine to start with once a day. On the day you add a PDRN ampoule, avoid starting a new exfoliating product or retinol at the same time, so you can more easily tell which product you’re reacting to.
FAQ
Is it okay to use PDRN skincare every day?
If the product’s directions say to use it daily, you can. Start with one product in a small amount, and stop if stinging, itching, or redness continues. The ingredient name “PDRN” alone doesn’t establish that every such product is fine for daily use.
Is it better to apply PDRN in the morning or at night?
If a product doesn’t specify otherwise, you can use it morning or night. In the morning, apply sunscreen after your ampoule and moisturizer; if your skin is sensitive, start with once a day and watch how it responds.
What are the side effects of PDRN skincare?
There isn’t enough cosmetic research to describe side effects specific to PDRN itself. Skin can also react to other ingredients in the formula, such as fragrance or acids, so stop if stinging, redness, or itching continues.
Is plant-derived PDRN better than salmon-derived PDRN?
You can’t generalize about which performs better. Plant-derived PDRN differs in sourcing and vegan status, but comparing actual products means also looking at formula, concentration basis, co-formulated ingredients, and finished-product testing.
What’s the difference between PN and PDRN?
Both refer to fragments of DNA, but their molecular size and definitions aren’t used consistently across the literature. Look at the Sodium DNA listing and the brand’s ingredient explanation rather than the product name alone.
If I have a fish allergy, should I choose plant-derived PDRN?
Plant-derived PDRN can be a sourcing option if you’re trying to avoid salmon-derived ingredients. But a plant-derived product can still cause a reaction due to other ingredients, so don’t assume it means “no allergy risk.” If you have a history of allergies, check the full ingredient list and talk to a healthcare provider.
Is a PDRN ampoule okay for sensitive skin?
PDRN alone can’t tell you that — look at the finished formula and how your own skin responds. Other ingredients in the product, such as fragrance, ethanol, or acids, can also affect how skin reacts. Before using it on your whole face, apply it to one spot on your inner arm twice a day for about 10 days.
Can I tell from the label whether PDRN is plant-derived or salmon-derived?
Not from the ingredient list alone. Whether it comes from salmon or from plants such as rice or centella, it can appear as a single line: Sodium DNA. Check the brand’s ingredient explanation for the source.
What kinds of skincare products contain PDRN?
It’s used in leave-on products such as ampoules and creams, and in rinse-off products such as cleansers. They’re used differently, so a rinse-off cleanser shouldn’t be expected to act like a leave-on ampoule. Check each product’s full formula and directions.
Does PDRN skincare work the same way as a PDRN injection?
No, they can’t be considered equivalent. An injection delivers material beneath the skin, while a cosmetic is applied to the surface, so the delivery method and evidence base differ. Injection research shouldn’t be presented as evidence for what a topical product does.
The bottom line
When choosing PDRN skincare, look past the trending ingredient name and check the distinction between injections and cosmetics, the ingredient’s source, its Sodium DNA listing, the basis for any percentage, and the finished formula. SKIN9HARI is transparent about the sourcing and manufacturing of its own Icheon rice-derived PDRN, while not promising results that haven’t been demonstrated in its finished products.
Sources
- Lee S, et al. The Effectiveness of Polynucleotides in Esthetic Medicine: A Systematic Review. J Cosmet Dermatol. 2024.
- Alhussain AM, et al. Polynucleotides and Polydeoxyribonucleotides (…): A Systematic Review of Randomized Clinical Trials. Cureus. 2026.
- Marques A, et al. From Polydeoxyribonucleotides to Polynucleotides: Scientific Definitions and Clinical Applications. 2025.
- Anti-Aging Efficacy of Low-Molecular-Weight PDRN Derived from Paeonia lactiflora. 2026.
- American Academy of Dermatology. How to test skin care products.
- Korean Registered Patent No. 10-2682938. Method for producing PDRN from plant material.
This guide provides general cosmetic and skincare information and does not diagnose or replace treatment for any individual condition. It draws a clear line between published research, patents, and expert guidance on one hand, and SKIN9HARI’s current ingredient and formulation documentation on the other.