Short answer: "best PDRN serum" isn't answerable as usually asked, because PDRN products don't quote a comparable number. Some print ppm, some print a percentage, some print neither and lead with a product name like "5-PDRN" or "Reedle Shot." Convert everything to one unit first, then the comparison actually means something — and topical PDRN, however it's dosed, is still not the same thing as the injectable procedure the ingredient's reputation is built on.

By the LAVOÙE team · Last updated 2026-09-22. General information, not medical or dermatological advice.

Why "best PDRN serum" is an unanswerable question as usually asked

Type "best PDRN serum" into a search bar and you'll get a stack of ranked listicles, most of them from sites that sell one of the products they're ranking. We're not going to add another one — a brand ranking its own product first in a "best of" list isn't a recommendation, it's an ad wearing a recommendation's clothes.

What's actually missing from the category isn't a ranking. It's a way to compare the numbers different brands print, because right now those numbers aren't in the same units. This post is that conversion table, plus the questions worth asking before "which PDRN serum" even becomes the right question.

ppm vs. % vs. "5-PDRN": converting every claim to one unit

Parts per million (ppm) and percentage measure the same thing at different scales: 10,000 ppm = 1%, 20,000 ppm = 2%. Once you convert, brands' public claims line up like this:

  • The INKEY List PDRN Serum — 20,000 ppm (2%), plant-derived PDRN from Artemisia capillaris.
  • Medicube PDRN Pink Peptide Serum — 10,000 ppm (1%) salmon-derived PDRN. (Medicube's separate PDRN Pink Collagen Exosome Shot Serum is a different product at 7,500 ppm — worth checking which one you're actually looking at.)
  • VT PDRN 100 Essence — publicly listed at 100,000 ppm (10%). A number that high is worth a second look: it's often unclear whether a headline ppm figure describes the finished product on your skin, or the concentration of a raw-material input solution before it's diluted into the formula. Neither convention is dishonest on its own, but they aren't the same number, and product pages rarely specify which one they're quoting.
  • LAVOÙE Ultra Light PDRN Peptide Serum — 1% PDRN (10,000 ppm), salmon-derived.
  • LAVOÙE PDRN Intensive Concentrate — 2% PDRN (20,000 ppm), salmon-derived.

Then there's a naming pattern that isn't a concentration at all: COSRX's "5-PDRN" line. The "5" refers to five different PDRN-adjacent sources blended into the formula (salmon DNA, green caviar, rice, lactobacillus ferment, and centella asiatica) — not five times the concentration, and not five percent. It's a genuinely easy number to misread if you're skimming for a dose, and worth knowing before you compare it to a plain percentage figure. COSRX doesn't publish a specific PDRN percentage for this line at all; where it does disclose concentrations elsewhere in the same products, it uses ranges rather than single figures — Niacinamide listed as 2.70%–4.00% in one 5-PDRN formula, 2.00%–2.50% in another. A range isn't a precise number, and it can't be converted or compared the way a flat percentage can.

None of this is about which of these numbers is "best." It's that you can't compare them at all until they're in the same unit — and once they are, the spread across the category is real: roughly 0.75% to 2% for products stating a finished-product percentage, before you even get to the harder-to-verify raw-material claims.

Source matters: salmon-derived, vegan, and what "sodium DNA" actually means

PDRN was originally, and is still most often, extracted from salmon or trout milt (sperm cells) — this is what "salmon DNA" or "sodium DNA" on a label refers to. It's the form the original clinical literature is built on.

Plant-derived PDRN, sourced from ingredients like Artemisia capillaris (INKEY's version) or ginseng (VT's "PHYTO PDRN"), is marketed as vegan and allergen-friendlier — a legitimate reason to prefer it if fish-derived ingredients are a concern for you. What it isn't, as of current public literature, is a form with the same depth of published evidence as salmon-derived PDRN — a newer entrant with a thinner track record so far.

If a product's marketing doesn't specify source, and the ingredient list just says "PDRN" or "polydeoxyribonucleotide" with no qualifier, salmon-derived is the reasonable default assumption — but it's a five-second check worth making if you have a fish allergy.

The honest efficacy ceiling: topical is not injectable

This is the part most buying guides skip, because it undercuts the whole category rather than helping rank within it — but it's the single most useful thing to know before spending on any PDRN serum, including ours.

PDRN's original, best-evidenced clinical results come from injectable procedures, where the compound is delivered directly into or beneath the dermis. Dermatology Times' 2026 "Social Media Mythbusters" review of PDRN serums makes the structural problem plain: because the clinical procedure that produced PDRN's strong results isn't legally available as an over-the-counter product in the US, the entire topical PDRN skincare market is, by necessity, selling the ingredient in a delivery format that was never what generated the evidence people cite when they talk about PDRN. Topical cosmetics also don't require U.S. Food and Drug Administration (FDA) approval before sale, so there's no federal verification of a specific serum's efficacy claims the way there would be for a drug.

There's a real physical reason the delivery gap matters, not just a regulatory one. PDRN is a mixture of DNA fragments ranging from roughly 50 to 1,500 kilodaltons, with most of the distribution between 80 and 200 kDa. Human skin has a passive-absorption ceiling around 500 daltons — even PDRN's smallest fragments sit more than a hundred times above that. The receptors PDRN needs to reach (adenosine A2A receptors, found on fibroblasts and other cells) live in the dermis, roughly 70–100 micrometres below the surface, well past where an unassisted topical molecule that size reliably travels.

None of this means topical PDRN does nothing — formulation choices (discussed next) affect how much gets where it's going. It means the honest framing is "a supporting daily step," not "the same result as the procedure," regardless of what number is printed on the front of the bottle.

What else in the formula decides whether it works

Concentration and source are the two numbers you can check in ten seconds, but they're not the whole formula:

  • Vehicle and pH. A serum base built to support penetration and stability behaves differently from a simple water solution, even at the same stated PDRN percentage.
  • Supporting actives. Peptides, panthenol, or other barrier-supportive ingredients layered alongside PDRN can meaningfully change how a formula performs and feels, independent of the PDRN number itself.
  • Packaging and stability. PDRN, like many bioactive ingredients, can degrade with light and air exposure over time; opaque or airless packaging is a genuine (if unglamorous) formulation decision, not just aesthetics.

A higher printed percentage in a poorly stabilised, badly packaged formula isn't automatically better than a lower percentage handled well — necessary, not sufficient.

A 5-point checklist for comparing any two PDRN serums

  1. Convert to one unit. ppm to percentage (divide by 10,000), or percentage to ppm (multiply by 10,000), before comparing anything.
  2. Confirm the source. Salmon/trout-derived or plant-derived — check for a fish allergy, and know which evidence base you're actually relying on.
  3. Check whether the ppm figure is the finished product or a raw-material input. If a brand doesn't say, that ambiguity itself is worth noting.
  4. Look at what's layered around the PDRN — a formula with sensible supporting actives and real packaging thought is a better bet than concentration alone suggests.
  5. Set expectations at "supporting daily step," not "injectable-equivalent." Any marketing implying otherwise is a reason for skepticism, not enthusiasm.

How LAVOÙE's two PDRN formulas score on this checklist

Applying our own checklist to our own products, plainly: Ultra Light PDRN Peptide Serum is 1% (10,000 ppm) salmon-derived PDRN in a lightweight, fast-absorbing base with a five-part peptide complex; PDRN Intensive Concentrate steps up to 2% (20,000 ppm), same source, for skin that's already comfortable with the Ultra Light formula. Both figures are the finished-product percentage, not a raw-material input number — stated that way specifically so the comparison above is possible without asking us first.

We don't claim either formula replicates an injectable procedure's results, for the reasons in the efficacy-ceiling section above. What we'll say plainly: they're formulated as a daily, topical, supporting step, priced and positioned as that, not as a substitute for a clinical treatment.

Related reading

For the mechanism and evidence base in full, see our complete PDRN breakdown. If you're deciding between PDRN and a different active entirely, PDRN vs. Niacinamide covers that comparison directly. And for the general method behind reading any ingredient label, not just PDRN's, see How to Read a Skincare Label.

Sources

  • Dermatology Times, "Social Media Mythbusters: PDRN Serums" (2026) — on the topical-vs-injectable delivery gap and FDA cosmetic status.
  • Published molecular-weight range (50–1,500 kDa) and adenosine A2A receptor mechanism, cross-referenced against our own PDRN breakdown.
  • Competitor concentration figures quoted from each brand's own public product pages at time of writing; figures may change if brands update formulas.