The names “PDRN ampoule” and “PDRN serum” alone don’t tell you the concentration or the effect. Choosing between them means checking how PDRN or Sodium DNA is labeled, the full ingredient list, the texture and directions for use, and what your current routine actually needs. Findings from injectable or in-office PDRN research shouldn’t be applied directly to a leave-on cosmetic.
Quick answer
- The word “ampoule” is no guarantee that a product is more concentrated than a “serum.”
- PDRN can appear on an ingredient list under the name Sodium DNA.
- Whether a percentage or ppm figure refers to the actual finished-product concentration or the raw-material dosage needs to be checked.
- Routine order usually places this step after toner and before cream, but you don’t need to use both an ampoule and a serum.
- Results from injection or in-office procedure research shouldn’t be presented as effects of a cosmetic PDRN product.
Are ampoule and serum official, regulated terms?
Names like ampoule, serum, and essence are not official grades that guarantee a product’s concentration or performance. They’re closer to naming conventions brands use to describe texture and user experience.
There’s a common assumption that ampoules are richer and serums are lighter, but products that break that pattern exist too. Even under the same name, viscosity, oiliness, how much you use per application, and the ingredients included can all differ — so checking the product page’s directions for use and full ingredient list directly is more reliable than going by the name.
Is PDRN the same thing as Sodium DNA?
PDRN is used as a term for a certain range of DNA fragments. On a cosmetic ingredient list, it may appear as Sodium DNA.
Even among products labeled “PDRN,” the raw-material source, manufacturing process, characteristics of the DNA fragments, and actual formulated amount can differ. That’s why findings from salmon-derived PDRN research can’t automatically be applied to a plant-derived raw material like rice, or to a different finished product.
Is injectable/procedural PDRN the same as PDRN in a cosmetic?
No. Injections and in-office procedures deliver PDRN beneath the skin, while cosmetics are applied to the skin’s surface. Because the delivery route and product category are different, what you can reasonably expect — and what precautions apply — differ as well.
A systematic review examining PN/PDRN research for aesthetic purposes reported some promising findings, but the number of studies and participants was small, and study quality was rated low to moderate. A 2026 systematic review of 7 randomized trials (183 participants) likewise found that most studies used injections or procedures. Because this evidence base centers on injections and procedures, it can’t be used to claim that a PDRN ampoule does what an injection does — and study doses shouldn’t be compared with the numbers on an ampoule label.
How do you read a PDRN concentration claim?
1% is equal to 10,000 ppm. Once the units match, the numbers themselves are comparable — but you need to first confirm the two numbers are measuring the same thing.
For example, “0.1% PDRN raw material was added” and “the finished product contains 0.1% Sodium DNA” are not necessarily the same statement. A complex raw material is often made up mostly of solvent or other components, with the target ingredient making up only a portion of it. Big numbers like 4% or 20% start from the same question.
So when you look at a concentration figure, check the following:
- Is this the Sodium DNA concentration in the finished product?
- Is this the dosage of a PDRN complex raw material?
- Is the concentration used in the study the same as the concentration in the product actually sold?
- Is there manufacturer documentation to verify this figure?
For products that don’t disclose a concentration, you can’t calculate an exact figure just from where the ingredient sits on the list. It’s more useful to look at whether a brand is transparent about what a number actually measures than to focus on the word “high-concentration.”
Ampoule or serum — which should you pick?
If you’re already using a lightweight, water-based serum and still feel dry afterward, it can be worth comparing a thicker product or a cream step. On the other hand, if layering several products leaves your skin feeling heavy or your makeup pilling, scaling back to one lighter step can be the more practical move.
In the morning, check whether it pills under makeup or sunscreen; in the evening, avoid starting several new active-ingredient products all at once. There’s no evidence that layering an ampoule and a serum together increases any PDRN-related effect.
What should sensitive or breakout-prone skin look for?
The ingredient name “PDRN” alone doesn’t tell you how gentle a product is. You need to look at what else is in the formula — fragrance, ethanol, acids, retinoids — along with the texture and your skin’s current condition.
Try a new ampoule on a small area for a few days first, and introduce one new product to your routine at a time. That check screens for irritation; it doesn’t tell you how well a product works. Stop use if stinging, itching, redness, or swelling persists, and see a dermatologist if it doesn’t settle. PDRN cosmetics are not medicines.
What can you actually verify about SKIN9HARI’s N.F Ampoule?
The current full ingredient list for the Revive Therapy N.F Ampoule includes Sodium DNA. This ingredient is derived from a rice-based raw material — RICE-P PDRN — sourced from rice grown in Icheon, Korea, and the related manufacturing process is documented under Korean patent 10-2682938. The patent covers the raw material and process; it is not a study demonstrating a skin effect from the finished N.F Ampoule product.
The concentration figures SKIN9HARI discloses for this product are dexpanthenol 0.5%, betaine 1.0%, and sodium hyaluronate 0.06%. SKIN9HARI does not state a PDRN percentage or ppm for the N.F Ampoule, and does not call it “high-concentration PDRN.” The formula does not include fragrance, essential oils, ethanol, dyes, or silicones, and the finished product was irritation patch-tested (24-hour patch test, 33 adults).
The reasoning behind choosing this product isn’t a claim of high PDRN concentration or an injection-like effect. It’s that the rice-based ingredient’s origin can be traced, and the disclosed concentration figures for hydrating ingredients used in the step before cream — along with what the formula leaves out — can be checked against manufacturer documentation.
What to check before pairing it with N.F Cream
The current full ingredient list for the Revive Therapy N.F Cream includes panthenol, Sodium DNA, 4 ceramides, 5 types of hyaluronic acid, and plant-derived squalane. It contains no fragrance, but does contain dimethicone.
You don’t have to layer cream on top of the ampoule. If the ampoule alone feels comfortable, you can stop there, and add a small amount of cream on days when your skin feels dry. Being part of the same line doesn’t by itself mean lower risk of ingredient conflicts or a stronger combined effect.
What’s the routine order?
The typical order is: cleanse, toner, ampoule or serum, cream, and morning sunscreen. Toner isn’t mandatory, and if a product’s own directions say otherwise, follow those first.
When starting out, you can pick just one of ampoule or serum and use a small amount once a day. If your skin feels comfortable and the product’s directions allow it, you can adjust to morning-and-evening use.
FAQ
Is a PDRN ampoule always stronger than a serum?
No. The names “ampoule” and “serum” don’t guarantee a specific concentration or viscosity. Compare the actual texture, full ingredient list, disclosed concentration, and directions for use.
What is PDRN called on a cosmetic ingredient list?
On a cosmetic ingredient list, it may appear as Sodium DNA. A brand’s marketing name and the official ingredient name can differ.
Is a higher PDRN concentration always better?
There isn’t enough evidence to say that definitively. Check first whether the number reflects actual finished-product concentration or raw-material dosage, then consider it alongside the whole formula and how your skin responds.
Can a PDRN ampoule be used every day?
If the product’s directions call for daily use, you can start with a small amount. The name “PDRN” alone doesn’t guarantee that every product is safe for daily use.
Can a PDRN ampoule be used with retinol, AHA, or BHA?
The ingredient name PDRN alone doesn’t establish an absolute restriction on combining products. Still, avoid starting several potentially irritating products at the same time — add them one at a time and watch how your skin responds.
Can I use a PDRN serum and a PDRN ampoule together?
There’s no evidence that layering the two increases any PDRN-related effect. Picking one and starting with a small amount once a day makes it easier to tell how your skin responds, and if your skin feels heavy or products start pilling, scale back to one step.
Is 10,000 ppm of PDRN a low concentration?
10,000 ppm equals 1%. Once the units match you can compare the numbers, but if one figure is the Sodium DNA concentration in the finished product and another is the dosage of a complex raw material, they shouldn’t be ranked against each other.
How do I judge a PDRN product that doesn’t disclose its concentration?
You can’t calculate an exact concentration from where an ingredient sits on the list. When comparing products, mark it as undisclosed and ask the manufacturer, and look at whether the brand explains what its numbers measure rather than at the word “high-concentration.”
Does a PDRN ampoule actually work when you put it on your skin?
Most known PDRN research involves injections or in-office procedures, so those results can’t be carried over to a leave-on ampoule. Judge a topical product by its full formula, its directions, and how your skin responds.
Related guides
- Is It Okay to Use PDRN Skincare Every Day? Salmon vs. Plant-Derived, and How to Choose
- How to choose a panthenol cream
- Morning and night routine order for breakout-prone skin
- How many products should sensitive skin actually use?
Written and reviewed by
- Written by: SKIN9HARI Content Team
- First published: August 30, 2026
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.
- Korean Registered Patent No. 10-2682938. Method for producing PDRN from plant material.
- American Academy of Dermatology. How to test skin care products
- Korea Ministry of Government Legislation. Enforcement Rules of the Cosmetics Act
This guide is general skincare information, not medical advice. SKIN9HARI products are cosmetics and are not intended to diagnose, treat, cure, or prevent any disease. If a skin problem is painful, spreading, or persistent, see a dermatologist.