Integrating PDRN, Polynucleotides, and Exosomes into Modern Dermatology

By Dr Naomi Mackle, Dermatology Specialist and Medical Director, Adare Dermatology Clinics

"Salmon DNA", PDRN, polynucleotides, and exosomes have dominated discussions across aesthetic medicine this year. Patients frequently inquire about these trendy options at our Adare Dermatology Clinics across Dublin, Limerick, and London. As a medically-led practice, our commitment is to objective clinical science rather than fleeting trends. We assess treatments based on robust safety profiles and verified efficacy. Below is our clinical assessment of where these emerging therapies currently stand.

Core Principles for Clinical Decision-Making

Before introducing any new therapy at Adare Dermatology Clinics, we evaluate it against four strict standards:

• Evidence over Hype: We require published, independent clinical data on specific branded products rather than general claims about raw active ingredients.
  
• Rigorous Safety Standards: We must verify exact vial ingredients, source origins, manufacturing standards, and regulatory approvals across the UK and Ireland.
  
• Transparent Patient Expectations: We outline precisely what a treatment can and cannot achieve prior to any financial commitment.
  
• Proven Alternatives First: Novel therapies must complement or outperform existing, well-validated treatments rather than replace them arbitrarily.
  

Understanding the Treatments

Polynucleotides (PN) and PDRN

• What They Are: Both PN and PDRN consist of highly purified DNA fragments typically harvested from salmon or trout. Polynucleotides feature longer molecular chains, whereas PDRN consists of shorter segments.
  
• How They Work: Laboratory studies indicate these compounds stimulate fibroblasts—the primary cells responsible for collagen synthesis—while suppressing inflammation and aiding tissue repair.
  
• Applications: Originally developed for wound healing, they are now used in aesthetic medicine as injectable "skin boosters" as well as in topical formulations.
  
• Expected Outcomes: Rather than restoring lost volume or lifting sagging tissue, they aim to refine overall skin quality, targeting fine lines, under-eye crepiness, texture, dehydration, and mild acne scarring.
  

Exosomes

• What They Are: Exosomes are microscopic extracellular vesicles used by cells to transfer growth factors and signaling proteins to one another.
  
• Production Sources: Commercial preparations vary widely and are derived from human stem cells, blood platelets, plant tissue, or bacteria.
  
• Intended Function: Typically applied topically following microneedling or energy-based laser treatments, they are designed to accelerate healing, boost collagen production, calm inflammation, and promote hair growth.
  

What Does the Clinical Evidence Show?

The clinical data behind these modalities vary significantly in quality and depth:

Regulatory Note: Exosome formulations lack standardized dosing, sourcing, and purity metrics, meaning findings for one product cannot be generalised to another. The US Food and Drug Administration (FDA) has not approved any exosome product for aesthetic use and has issued public safety alerts regarding unapproved treatments.

Reconciling Clinical Enthusiasm with Evidence

While respected practitioners often praise exosomes online—particularly for hair loss—patient improvements can be misleading. Procedure techniques like microneedling independently trigger hair growth and collagen synthesis, and patients frequently employ validated medical treatments concurrently. Without rigorously controlled, head-to-head clinical trials, the additive value of exosomes remains unproven. This calls for patient observation and higher-quality research before widespread clinical adoption, rather than outright dismissal.

Where These Options Fit in Our Practice

1. Injectable Polynucleotides

We offer polynucleotides as an appropriate option for subtle, progressive enhancements in skin quality—especially around the delicate eye area. We explicitly inform patients that these injections do not lift tissue or restore lost volume.

2. Jalupro

We have integrated Jalupro, an injectable skin booster combining hyaluronic acid with collagen-building amino acids. It hydrates deep skin layers and supports structural proteins to improve dullness, crepiness, and fine lines (including the under-eye area). Hyaluronic acid carries an established safety record. Although clinical studies combining hyaluronic acid with amino acids are small, results are encouraging. We offer Jalupro as a gentle treatment for gradual skin refinement rather than a volumising or lifting procedure.

3. Exosomes

We continue to monitor evolving research. While exosomes may eventually prove beneficial as an adjunct therapy following laser treatment or microneedling to speed recovery, current product standardization and clinical data do not yet meet our standards for routine recommendation. For hair thinning, they cannot replace established medical interventions.

Safety and Risk Considerations

• Polynucleotide Safety: Injectable polynucleotides demonstrate a strong safety record. Transient side effects like mild localized redness, swelling, and bruising are common. They are strictly contraindicated in individuals with fish or seafood allergies, pregnant or breastfeeding patients, or those with active skin infections.
  
• Exosomes Safety: Safety risks depend heavily on source material and manufacturing protocols. The broader medical literature reports serious adverse events—such as granuloma formation and severe allergic reactions—predominantly associated with unapproved injections rather than topical applications.
  
• Practitioner Expertise: Regardless of the product, patient safety depends primarily on the skill and knowledge of the clinician. Injectable procedures should always be carried out by qualified medical professionals capable of performing comprehensive assessments and managing complications.
  

Tried-and-Tested Alternatives with Robust Clinical Backing

For patients seeking reliable skin and hair rejuvenation, several options offer decades of high-level clinical evidence:

1. Daily Broad-Spectrum Sunscreen: The foundational step against premature ageing, backed by extensive multi-year trials. Formulations like our oil-free REFORM Mineral SPF 30 and SPF Mist provide essential daily protection.
   
2. Topical Vitamin C (20% L-Ascorbic Acid): A thoroughly researched antioxidant serum that neutralises free radicals from UV light and pollution, brightens skin tone, and supports collagen synthesis when applied each morning under SPF.
   
3. Retinoids: Vitamin A derivatives (such as REFORM's nighttime retinyl palmitate) feature decades of clinical data proving their ability to smooth texture, diminish fine lines, and fade hyperpigmentation.
   
4. Anti-Wrinkle Injections & Dermal Fillers: Long-established, extensively researched interventions for softening dynamic expression lines and restoring structural volume loss, performed following a medical consultation.
   
5. Aesthetic Procedures (Lasers, Chemical Peels, Microneedling): Proven physical modalities for treating scarring, uneven texture, and stubborn pigmentation.
   
6. Prescription Hair Loss Therapies: Target-specific medical treatments with proven clinical efficacy for hair restoration, prescribed after a medical evaluation.
   

Summary

Injectable polynucleotides demonstrate promising early results for improving skin quality alongside a favorable safety profile. Conversely, topical PDRN and exosome treatments lack high-quality clinical backing, with exosomes facing significant issues regarding product standardization. At Adare Dermatology Clinics, we continue to track emerging research and will only introduce new modalities when safety and efficacy are fully validated. Proven, evidence-based treatments tailored to individual clinical evaluations remain the gold standard.

To discuss personalized skin boosters or address hair and skin concerns, book a medical consultation with our dermatology team at Adare Dermatology Clinics in Dublin, Limerick, or London.