Minimally invasive facial rejuvenation treatments such as skin boosters, polynucleotides, PRP (platelet-rich plasma), and exosomes are increasingly offered as ways to improve skin quality, hydration, texture and overall skin health. Although these treatments are often grouped together, they work in very different ways. Polynucleotides, PRP, and exosomes are regenerative treatments, aiming to stimulate tissue repair, while skin boosters primarily improve hydration. It can be difficult for patients – and even doctors – to choose the correct treatment. Let’s look through them, one by one, to better understand their strengths, limitations, and applications.
Skin Boosters
Skin boosters are injectable hyaluronic acid (HA) products designed primarily to improve skin hydration, elasticity and surface quality. Although they contain HA in common with traditional dermal fillers, skin boosters differ in that they do not create volume. Their principal effect is improved hydration and dermal turgor, leading to glow and radiance, reduced crepiness, smoother skin texture, softening of fine lines, and improved skin elasticity. Of the treatments discussed in this article, skin boosters have perhaps the most predictable ability to improve visible skin quality, albeit largely through hydration rather than biological regeneration.
Polynucleotides
Polynucleotides (PN, PDRN) are purified DNA fragments, most commonly derived from salmon. Unlike PRP, these are manufactured products with relatively consistent composition and dosing. Polynucleotides are thought to work through fibroblast stimulation, extracellular matrix remodelling, and improved collagen production. Unlike skin boosters, which improve skin hydration, polynucleotides aim to improve the quality of the dermis itself. Current evidence suggests benefits in skin elasticity, fine lines, texture, pore size, and overall skin quality, particularly under-eye skin quality.
Polynucleotides currently have the strongest balance of biological plausibility, clinical outcomes, and safety data among the regenerative injectable treatments. However, the effects are gradual rather than immediate, and multiple treatment sessions are usually required.
PRP (Platelet-Rich Plasma)
PRP involves taking a sample of the patient’s blood, centrifuging it to concentrate platelets, and then reinjecting the platelet-rich fraction into the skin. Platelets release a variety of growth factors involved in wound healing and tissue repair, including platelet-derived growth factor (PDGF), transforming growth factor beta (TGF-β), and vascular endothelial growth factor (VEGF). The rationale is that these growth factors encourage collagen production and tissue regeneration.
The quality of PRP preparation may vary enormously between clinics. Differences in centrifugation protocols, platelet concentration, leukocyte content and activation methods can all influence results. This lack of standardisation makes comparison between studies difficult and contributes to inconsistent clinical outcomes.
While PRP remains popular, the evidence supporting facial rejuvenation is somewhat mixed. Some studies show modest improvements in skin quality and fine lines, while others demonstrate little objective benefit compared with placebo. PRP is therefore best suited as an adjunctive treatment for skin quality improvement, often in combination with microneedling. It often plays a useful role in post-surgical healing support, e.g. following facial fat grafting.
Exosomes
Exosomes are extracellular vesicles released naturally by cells. They contain proteins, lipids, messenger RNA, and signalling molecules. These vesicles play an important role in cell-to-cell communication and have generated considerable interest within regenerative medicine. Theoretically, exosomes could influence cellular pathways involved in tissue repair, inflammation, collagen production, and skin regeneration. While the scientific rationale is compelling and laboratory studies have demonstrated significant regenerative potential, clinical evidence of effectiveness is currently limited. Hence, at present, exosomes remain an exciting but largely unproven treatment category, best reserved for patients wanting to push the boundary and try something new.
Summary Table
| Feature | Skin Boosters | Polynucleotides | PRP | Exosomes |
|---|---|---|---|---|
| Product examples | Profhilo, Restylane Skinboosters, Juvéderm Volite, Teosyal Redensity 1 | Rejuran, Nucleofill, Plinest | Autologous PRP prepared from the patient’s own blood | Exocean, E50, ASCE+, ExoCoBio |
| What is it? | Hyaluronic acid | Purified DNA fragments, typically salmon-derived | Concentrated platelet fraction | Extracellular vesicles containing proteins, lipids, RNA and signalling molecules |
| Main mechanism | Water binding, dermal hydration and mild fibroblast stimulation | Fibroblast activation and extracellular matrix remodelling | Growth factor release from activated platelets | Cellular signalling through delivery of bioactive molecules |
| Primary role | Hydration, glow and improvement of skin quality | Dermal repair and regenerative skin-quality improvement | Tissue repair and regenerative signalling | Theoretical regenerative signalling and tissue repair |
| Evidence quality | Moderate to strong | Moderate | Low to moderate | Low |
| Hydration improvement | Strong | Mild to moderate | Minimal | Uncertain |
| Texture improvement | Moderate | Moderate | Mild | Uncertain |
| Fine line improvement | Moderate | Mild to moderate | Mild | Uncertain |
| Pore reduction | Mild | Moderate | Mild | Uncertain |
| Volume restoration | Minimal | None | None | None |
| Collagen stimulation | Mild | Moderate | Mild | Theoretical |
| Best use | Dehydrated skin, crepey skin, loss of radiance, fine lines and skin maintenance | Enlarged pores, under-eye rejuvenation, texture improvement and overall skin quality | Adjunctive treatment, often combined with microneedling | Adjunctive treatment |
| Immediate results | Yes | No | No | No |
| Typical durability | 6-9 months | 3-6 months | 1-3 months | Unknown |
| Reversible | Yes (with hyaluronidase) | No | No | No |
| Typical treatment course | Usually 2-3 initial sessions followed by maintenance every 6-12 months | Usually 2-4 sessions followed by maintenance every 6 months | Typically 2-4 sessions, often repeated regularly | No protocol |
Understanding the Difference Between Hydration and Regeneration
One of the most common sources of confusion in facial aesthetics is the difference between skin boosters and polynucleotides. Both treatments can improve skin quality, texture and overall appearance; however, they work in fundamentally different ways.
Skin boosters are designed to increase hydration within the skin. When the skin becomes better hydrated, several visible changes occur:
- The skin surface becomes smoother; the smoother surface scatters less light
- Hydrated fine lines become less apparent
- Micro-shadows caused by small wrinkles are reduced
- Overall, light reflects more evenly from the skin surface, creating glow and radiance
The result is an improvement in skin freshness. In many patients, the improvement is noticeable quickly because, rather than changing the underlying structure of the skin, skin boosters primarily improve its appearance by increasing water content and dermal turgor.
Polynucleotides work differently. Rather than attracting water into the skin, they are thought to stimulate fibroblasts and promote extracellular matrix remodelling within the dermis. The goal is not simply to make the skin look smoother, but to improve the quality of the tissue beneath the surface. Effects include improved collagen organisation, dermal repair, enhanced skin elasticity, more uniform skin texture, and mild improvements in skin firmness. These changes develop gradually over time and are less immediate than those seen with skin boosters.
The reason that these treatments are often confused is that they ultimately achieve many of the same visual goals: smoother skin, fewer fine lines, and reduced micro-shadowing. The difference lies in how they get there.
A useful analogy is a mattress:
- Skin boosters inflate the mattress, improving the appearance of the surface.
- Polynucleotides repair the springs inside the mattress, improving the structure beneath the surface.
Both approaches improve skin quality, but through fundamentally different mechanisms, and their benefits are often greatest when combined with other modalities as part of a comprehensive facial rejuvenation plan.
Frequently Asked Questions
Which treatment is best for hydration, glow and crepey skin?
Skin boosters are currently the most predictable option. Their principal mechanism is hydration, which leads to brighter skin, improved radiance, reduced crepiness, and softer fine lines.
Which treatment is best for skin texture and pores?
Current evidence favours polynucleotides. Results appear more consistent than with PRP, while exosome evidence remains preliminary.
Which treatment is best for fine lines?
Polynucleotides again appear to produce the strongest and most reproducible improvements. Skin boosters can also improve fine lines, although this is largely through hydration rather than structural dermal change.
Which treatment is best for under-eye rejuvenation?
Polynucleotides have become particularly popular because they can improve crepiness and skin quality without creating unwanted volume.
Which treatment is best for skin quality overall?
An evidence-based ranking would be:
But it is important to note that the treatments are complementary rather than competitive and that, with experience, patients often discover the treatment that works best for them.
What Can Skin Boosters, Polynucleotides, PRP, and Exosomes Not Do?
Skin boosters, polynucleotides, PRP, and exosomes are primarily skin-quality treatments rather than structural facial rejuvenation treatments. While they can improve hydration, skin texture, fine lines and overall skin quality, they cannot produce significant lifting, restore substantial facial volume, or reverse advanced facial ageing. Many of the most visible signs of ageing, including midface volume loss, temple hollowing, jowling and skin laxity, result from changes in facial fat compartments, retaining ligaments and skeletal support. These structural changes become increasingly important from the age of 40 onwards and cannot be corrected with skin-quality injectables alone.
As structural ageing progresses, the benefits of regenerative injectable treatments therefore become more subtle. At this stage, structural injectables, facial fat grafting, or facelift surgery may provide more meaningful facial rejuvenation. In short, skin boosters, polynucleotides, PRP, and exosomes may improve the skin, but they cannot rebuild the underlying structure of the ageing face.
Conclusion
For patients seeking improved skin quality, there is no single “best” treatment. The answer depends on the specific concern being treated.
- Skin boosters currently provide the most predictable improvements in hydration, glow and overall skin appearance.
- Polynucleotides offer the strongest combination of regenerative potential, clinical effectiveness and emerging evidence.
- PRP is uniquely appealing because it is comes from the patient’s own body, reducing the possibility of allergy or foreign body reactions.
- Exosomes are scientifically interesting and may ultimately prove valuable, but their clinical evidence is limited at present.
However, it is important to be clear about whether skin quality is the main problem. If volume loss, facial sagging, or structural ageing is the dominant concern, other treatments such as dermal fillers, Radiesse, Sculptra or facelift surgery may be better suited to address these, often in combination with the skin quality treatments discussed above.
If you are interested in knowing which of the structural injectables is best for you, read this article next:
Dermal fillers vs biostimulators vs hybrids – which is best for facial rejuvenation?
