Exosomes vs PRP vs Polynucleotides: The Science of Regenerative Skin Therapy.

Regenerative skin therapy is one of the most rapidly evolving areas of aesthetic medicine. In the last five years, three treatments have moved from research papers into clinic menus — exosomes, platelet-rich plasma (PRP), and polynucleotides. They're often grouped together as "regenerative" treatments, but they work through fundamentally different biological mechanisms, have different evidence bases, and produce different results.

This article explains the science behind each, where the genuine evidence currently sits, and what an informed Brisbane client should understand before booking any of them. As always, this is education first — not a recommendation. The right treatment depends entirely on individual factors that only a clinical assessment can determine.

What "regenerative" actually means.

Traditional aesthetic treatments work by stimulating skin response — creating controlled injury, thermal damage, or chemical exfoliation that triggers the body's natural repair processes. The skin does the regenerative work itself, with the treatment as the trigger.

Regenerative therapies work differently. Rather than just triggering the body's response, they deliver biological materials directly into the skin — growth factors, signalling molecules, or DNA fragments — that actively guide cellular behaviour. The treatment supplies the regenerative instructions rather than just stimulating the skin to figure them out itself.

This is a meaningful biological distinction. It's also why regenerative therapies are particularly promising for concerns that don't respond well to traditional stimulation — including significantly aged or damaged skin where the body's own regenerative capacity has declined, scarring that has plateaued with conventional treatment, and clients seeking enhanced recovery from more aggressive interventions.

Platelet-Rich Plasma (PRP), explained.

PRP is the oldest and most-studied of the three. It uses your own blood as the source material — typically 10-20ml is drawn, then spun in a centrifuge to separate out the plasma fraction concentrated with platelets. Those platelets contain growth factors that, when reintroduced to your skin, trigger tissue repair, collagen synthesis, and cellular regeneration.

The key advantages of PRP are biocompatibility and personalisation. Because the material is your own, there's no risk of allergic reaction, no regulatory concerns about external biological products, and the treatment is intrinsically tailored to your physiology. PRP has been used clinically for decades — initially in orthopaedics and wound healing, more recently in aesthetics.

The trade-offs are variability and intensity. PRP outcomes depend significantly on individual blood quality. Younger, healthier blood produces more potent PRP than older or compromised blood. Smokers, clients on certain medications, and clients with nutritional deficiencies may see reduced results. PRP also requires a blood draw, which not every client is comfortable with, and produces moderate downtime when injected — typically 2-5 days of bruising and swelling.

PRP is most established for hair restoration, certain forms of scarring, and general skin quality improvement. The evidence is strongest in these applications.

Exosomes, explained.

Exosomes are the newest and most-talked-about of the three. They're tiny extracellular vesicles — nanoparticles less than 200 nanometres across — that cells use to communicate with each other. They contain proteins, growth factors, lipids, and various RNA molecules that direct recipient cells to behave in specific ways.

In aesthetic medicine, exosomes are typically derived from stem cells (commonly human umbilical cord mesenchymal stem cells or plant-derived stem cells, depending on the source) and processed into a concentrated, applied product. When introduced to the skin — typically topically following microneedling or other treatments that enhance absorption — they signal local cells to upregulate regenerative activity.

The promise of exosomes is the concentration of regenerative signalling without the variability of autologous materials like PRP. Studies show effects on collagen synthesis, hair regrowth, pigmentation regulation, and accelerated post-treatment healing.

The complication is the regulatory landscape. In Australia, the TGA has not approved injectable exosome therapies for cosmetic use. Reputable clinics work topically — applying exosomes to skin that has been treated to enhance absorption (typically following microneedling, fractional RF, or peels) rather than injecting them directly. This is the legal pathway and the one we use at SKYNN.

Exosomes are emerging as particularly promising for post-treatment recovery enhancement, skin quality improvement, pigmentation support, and hair restoration. The clinical evidence base is rapidly growing but is still less mature than for PRP.

Polynucleotides, explained.

Polynucleotides are short fragments of DNA, typically derived from purified salmon DNA (which has high similarity to human DNA and excellent biocompatibility). When injected into the skin, they're broken down into nucleotides that fibroblasts use as building blocks for new tissue synthesis.

What makes polynucleotides distinct is their mechanism. They're not delivering growth factors or signalling molecules — they're supplying raw material for tissue repair while also having documented effects on fibroblast activity, anti-inflammatory pathways, and hydration. The result is genuine tissue regeneration rather than just signalling.

Polynucleotides have been extensively studied in Korean and European clinical literature, with strong evidence supporting their use for skin quality improvement, under-eye treatment, hydration of compromised skin, scar improvement, and as supportive therapy alongside more aggressive treatments.

The treatment is delivered through fine-needle injection, typically across multiple sessions spaced three to four weeks apart. Downtime is minimal — some swelling and pinpoint bruising for 24-48 hours. Results build over three to six months as the underlying tissue rebuilds.

Polynucleotides are particularly well-suited to clients with delicate or thinning skin, the under-eye area, mature skin where the natural regenerative capacity has declined, and clients who want regenerative results without the more dramatic interventions of energy-based treatments.

"Regenerative therapies aren't replacing traditional treatments — they're filling gaps that traditional treatments couldn't reach."

How they actually compare — side by side.

PRP uses your own blood. Best for hair restoration, atrophic scarring, and general skin quality. Moderate downtime. Evidence is mature. Cost is moderate to high. Variable outcomes depending on individual factors.

Exosomes use stem-cell-derived signalling molecules. Best for post-treatment recovery, pigmentation support, skin quality, hair restoration. Applied topically in Australia following enhancement treatments. Evidence is emerging. Cost is high. Outcomes are more consistent than PRP but the regulatory landscape requires careful clinic selection.

Polynucleotides use DNA fragments. Best for delicate skin, under-eye treatment, mature skin quality, hydration, and scar improvement. Minimal downtime. Evidence is strong, particularly in Asian and European clinical literature. Cost is moderate to high. Outcomes are particularly reliable for the right indications.

These treatments are increasingly used in combination rather than as alternatives. A client might receive polynucleotides for under-eye work, exosomes following a fractional RF treatment, and PRP for hair restoration — all as part of a single coordinated program. This is where regenerative therapy is heading: layered, sequenced, integrated into broader treatment plans.

The honest caveat.

Regenerative medicine in aesthetics is genuinely promising. It's also genuinely overhyped. Some clinics market exosomes as miracle treatments capable of reversing ageing. Some clinics conflate different products and treatments under the same name. Some sell single sessions as transformative when they're properly part of structured programs.

What an informed Brisbane client should know is this: regenerative therapies work when they're appropriately matched to the right indication, delivered by trained clinicians, and integrated into a broader treatment strategy. They're not first-line treatments for most concerns. They're not stand-alone solutions for ageing or significant skin damage. They're powerful tools that work brilliantly when used correctly and are disappointing when used inappropriately.

This is exactly the same principle that applies to skin needling, RF, and fractional RF. The treatment isn't the answer. The right treatment, applied to the right concern, at the right phase of a structured program, is the answer.

How we approach regenerative therapies at SKYNN.

At SKYNN we incorporate exosomes and peptide therapies into our treatment programs where appropriate — typically as part of sequenced approaches rather than stand-alone treatments. We follow current TGA regulations regarding application methods, use established product lines from regulated suppliers, and prescribe regenerative therapies only after a clinical assessment has established that they're the right fit for the client's skin and goals.

Most often, regenerative therapies are layered into broader programs after we've addressed barrier health, identified specific concerns through diagnostic imaging, and established a treatment foundation. They're rarely the right first step. They're frequently the right next step once the foundation is sound.

If you're considering any of these treatments, the same principle applies as for any clinical decision: book a proper clinical consultation, get diagnostic imaging done, understand what's actually driving your concerns, and let the treatment plan emerge from the findings rather than starting with a treatment and working backwards. Regenerative therapies are remarkable tools — when wielded correctly.

Your skin deserves a strategy.