PDRN & Polynucleotides
— K-Beauty Science Meets Skin Biology
Polynucleotides originate from aesthetic medicine in Korea and are increasingly finding their way into topical formulations. What research says about PDRN, adenosine receptors, and the question of skin penetration.
Polynucleotides – PDRN (Polydeoxyribonucleotide) for short – originated in aesthetic medicine in South Korea and have been considered one of the most intensively researched concepts for skin regeneration there for years. What was initially used exclusively in clinical injection procedures is now increasingly being incorporated into topical formulations of so-called K-Beauty science. The transition from the treatment room to the home routine raises legitimate questions about the mechanism of action, stability, and the actual potential for daily care.
Polynucleotides are fragmented DNA chains obtained from salmon sperm or plant sources and highly purified. Scientific literature discusses their ability to stimulate growth factor receptors, modulate oxidative stress, and support intercellular communication – mechanisms that are gaining increasing relevance in the context of skin barrier research and inflammaging. The chrono-biological perspective, as pursued by NATURFACTOR® with its Chrono-Barrier Skin Science™, opens up particularly interesting points of connection.
Mechanism of Action
The molecular basis of PDRN and polynucleotides in the skin is complex and is still being further elucidated in research. At its core, three overarching mechanisms of action can be described, which have been observed in vitro and in controlled studies. For topical applications, it must always be considered that the penetration depth of fragmented nucleotides through the skin barrier is a crucial variable – an aspect that TEWL research and barrier science are increasingly addressing.
PDRN can be described in the literature as an agonist of the adenosine A2A receptor. This interaction is associated with pro-regenerative signaling cascades, including the activation of cAMP-dependent pathways that can stimulate fibroblasts to increased collagen and growth factor synthesis. This mechanism is well-documented in tissue healing; for topical cosmetic formulations, its transferability is still the subject of ongoing research.
Fragmented nucleotides can be reabsorbed by skin cells via the so-called salvage pathway and used for DNA repair and energy metabolism support. This mechanism is particularly relevant in the context of UV-induced oxidative stress – one of the main drivers of oxidative skin aging. The use of external nucleotide building blocks can theoretically relieve the cellular repair apparatus.
Reduced levels of pro-inflammatory cytokines such as TNF-α and IL-6 have been observed under PDRN exposure in various cell models. This modulating effect on inflammatory processes is particularly interesting for the context of silent, chronic skin stress – i.e., what is described as inflammaging. However, a direct transfer to topical cosmetic applications requires further clinical evidence.
Forms in Formulation Practice
Polynucleotides represent a fascinating bridge between regenerative medicine and evidence-based cosmetic research. Their strength lies in their multifunctionality: an active ingredient that can potentially act simultaneously on cellular energetics, inflammation modulation, and matrix synthesis. The crucial scientific question for topical systems remains that of cutaneous bioavailability – and this is where the real innovation space for advanced formulation technology lies.
What This Means for Care
- Layering with moisture-binding active ingredients such as glycerin and hyaluronic acid before the PN essence
- Application on slightly damp skin to support penetration
- Combination with an intact skin barrier routine for optimal environment
- Simultaneous application of strong exfoliants like AHA/BHA without buffer time
- Over-layering with occlusive products immediately after polynucleotide application
- Unstable formulations with high UV exposure without additional sun protection
The NATURFACTOR® Porcelain Skin Serum accompanies the morning rhythm with the Bioactive Infusion Complex™, which is tailored to the skin's daily activity profile – a meaningful context for active ingredients that aim at cellular signaling and barrier resilience. In the evening, when the skin shows its highest regeneration readiness, the chronobiological timing of care routines is an aspect that is increasingly attracting attention in current research.
For specific skin concerns – such as persistent irritations, pronounced pigment changes, or conditions where clinically injectable PDRN therapies are considered – a specialist assessment by a dermatologist or plastic surgeon should be obtained.
Frequently Asked Questions
What is the difference between PDRN and polynucleotides (PN)?
PDRN (Polydeoxyribonucleotide) refers to specific, low-molecular-weight DNA fragments with defined chain lengths, which are primarily intended to act via the adenosine A2A receptor. The term polynucleotides (PN) is broader and generally describes longer nucleotide polymers. In cosmetics, both terms are often used synonymously, although they can differ in molecular size and potential mechanisms of action. High-quality formulations should transparently state the fraction used and its molecular weight.
Can PDRN in topical products even penetrate the skin barrier?
This is the central scientific debate. Intact nucleotide polymers with high molecular weight hardly penetrate the stratum corneum. In formulation science, therefore, work is being done on low-molecular-weight fragments, nano-encapsulation, and carrier systems to improve bioavailability. The literature also describes effects on the skin surface and in the upper epidermal layers, which can be relevant regardless of deep penetration. A healthy skin barrier is generally important as a prerequisite for optimal product efficacy.
For which skin types and concerns are polynucleotide formulations particularly suitable?
In the literature, polynucleotides are particularly discussed for skin showing signs of chronological aging, UV-induced fatigue, or barrier-weakening conditions. Due to their anti-inflammatory potential, they are also considered well-tolerated for sensitive skin. Since they are not classic exfoliants or retinoids, they can generally be integrated into various skincare steps – also in combination with plant-based alternatives to retinoids.
How do polynucleotides differ from exosomes in their mechanism of action?
While polynucleotides primarily act as receptor agonists and nucleotide building blocks, exosomes are nanoscale vesicles that transport complex biological information packages – including proteins, RNA, and signaling molecules. Both approaches pursue the goal of supporting cellular communication but differ fundamentally in their biological complexity and regulatory requirements for topical formulations.
- Guarnera G. et al. (2019). Polydeoxyribonucleotide in the management of radiation-induced skin changes. Journal of Wound Care.
- Squadrito F. et al. (2021). Pharmacological activity and clinical use of PDRN. Frontiers in Pharmacology.
- Kim B.J. et al. (2022). Polynucleotides in aesthetic dermatology: A review of clinical evidence and mechanisms. Journal of Cosmetic Dermatology.
- Veronesi F. et al. (2022). Polydeoxyribonucleotide effects on skin fibroblasts and extracellular matrix production. International Journal of Molecular Sciences.
- Park K.Y. et al. (2022). Advances in polynucleotide research for skin regeneration and anti-aging. npj Precision Oncology.
This article is for informational purposes only and does not constitute medical advice. For specific skin concerns, we recommend consulting a dermatologist.
