Your Guide to PDRN Skincare
PDRN is a DNA-derived nucleotide polymer studied in dermatology and regenerative medicine. Explore the published evidence by strength, scenario, and year — for education, not medical advice.
228Studies indexed
1965–2026Year coverage
Last updated
Evidence strength228 studies indexed · 10 retracted separate
RCT 15
Human observational 19
Animal study 88
In vitro / cell 46
Review 23
Case report 17
10 retracted or corrected
01 · Key facts
The molecule at a glance
02 · Source
Where PDRN comes from
PDRN is purified DNA taken from the sperm cells of salmonid fish — mainly rainbow trout and chum salmon. Sperm is chosen because it carries fewer proteins and other cell debris than other tissues. The species and tissue fix how each batch is identified and traced, and how much non-DNA material survives into the product.
The published process runs proteolysis, several separation steps and controlled partial depurination, then high-temperature processing at 121 °C. Reported active-substance purity exceeds 95%, with proteins and peptides inactivated rather than simply removed. These steps describe how a material is made, not what it does.
Extraction route, fragment size and processing differ between suppliers, so one product's analysis rarely matches another's. Reported mass spans roughly 50–1500 kDa, and a 1500 kDa cutoff is now proposed to separate PDRN from longer polynucleotides (PN). Comparing products by the label "PDRN" alone is therefore unreliable.
- 01
Source tissue
DNA is taken from rainbow trout and chum salmon sperm, the tissue with the least residual protein.
- 02
Extraction & purification
Proteolysis, three separation steps, partial depurination and 121 °C autoclaving yield reported purity above 95%.
- 03
Molecular characterization
A heterogeneous DNA polymer of roughly 50–1500 kDa; distributions differ by supplier and process.
- 04
Formulation
Supplied as injectable solutions and topicals — serums, creams, ampoules, masks — under INCI Sodium DNA.
03 · Molecular weight
How big the molecule is
Weight rangeReported as a range rather than a single value: 50–1500 kDa overall, with most material at 80–200 kDa (Gaussian peak ≈132 kDa). Fragment-size distributions are confirmed in the literature by agarose gel electrophoresis.
Size and behaviourSmaller polymer fragments cross skin barriers more readily in general — a relationship established for polymers such as hyaluronic acid. For PDRN specifically, penetration across molecular sizes has not yet been studied.
Process differencesExtraction and purification set the distribution: salmon-derived material is processed with proteolysis, separation and heat, while experimental plant PDRN is fragmented by ultrasonication. Reviews note a different polymer weight would need its own data, so a "PDRN" label does not guarantee an interchangeable material.
04 · Mechanism
How it works in skin
01
Contact and local penetration
PDRN is placed where it is needed: under the skin for skin uses, or into a wound bed, joint, or eye. The intradermal route is described as giving localized concentration at the target tissue while limiting systemic exposure.
Evidence level — Review02
Nucleic-acid-like signal recognition
PDRN is broken down into nucleotides and nucleosides. The proposed route is engagement of adenosine A2A receptors, plus a supply of bases and nucleosides through the cell's salvage pathway.
Evidence level — In vitro / cell03
Cellular response
Reported cell-level observations include increased VEGF expression, more CD31-positive microvessels and markers of new vessel formation, with granulation tissue and collagen changes reported in wound models.
Evidence level — Animal study04
Tissue-level outcome
At tissue level, the largest human dataset is in wound care: a placebo-controlled trial in 216 participants with chronic diabetic foot ulcers, plus smaller trials in pressure ulcers and skin grafts.
Evidence level — RCTMechanism pathway is a synthesis of the published literature; it does not indicate an approved indication.