PDRN injections have picked up considerable attention online over the past two years, partly thanks to an unusual nickname tied to their salmon-derived origin. Behind the viral framing is a legitimate area of regenerative skincare with a growing body of clinical interest, and it is worth separating the social media buzz from what the treatment actually does.
PDRN stands for polydeoxyribonucleotide, a molecule derived from purified DNA fragments sourced from salmon. It is not a filler and does not add volume. Its role is closer to a biological signal that encourages the skin to repair and regenerate itself.
How PDRN Actually Works
Polynucleotides work by activating fibroblasts, the cells responsible for producing collagen and elastin. When injected into the skin, PDRN molecules are absorbed by these cells and trigger increased cellular activity, which over time leads to improved collagen production, better hydration, and stronger skin structure.
This mechanism is different from injectable treatments like dermal fillers, which physically add volume, or neuromodulators like Botox, which relax muscle activity. PDRN does not change the shape of the face. It changes the quality of the skin itself, which is why results tend to appear gradually rather than immediately.
Clinical research on polynucleotides, including studies published in dermatology journals, has shown measurable improvements in skin elasticity and hydration following a course of treatment, though most of this research is still relatively recent and sample sizes in published studies remain moderate.
What It Can and Cannot Treat
Polynucleotide therapy is generally used for skin quality concerns rather than structural ones.
Commonly treated with PDRN:
- Fine lines and early signs of ageing
- Dehydrated or dull-looking skin
- Uneven skin tone and mild pigmentation
- Skin recovery after other treatments such as microneedling or laser
- Mild scarring and acne marks
Not typically addressed by PDRN alone:
- Significant volume loss, which usually requires dermal filler
- Deep static wrinkles, which may respond better to neuromodulators or combination approaches
- Loose or sagging skin from significant ageing, which often needs a different category of treatment such as radiofrequency or HIFU
This distinction matters because polynucleotides are sometimes marketed as a universal anti-ageing solution, when in practice they work best as part of a broader treatment plan rather than a standalone fix for every concern.
What a Session Involves
Treatment is typically delivered through a series of small injections across the treatment area, commonly the face, neck, décolletage, or hands. A session usually takes around 40 minutes and involves minimal discomfort, often reduced further with topical numbing.
Most clinics recommend a course of two to three sessions spaced two to four weeks apart for noticeable results, followed by periodic maintenance treatments. This is consistent with how the treatment works biologically: a single session stimulates some fibroblast activity, but a course allows the cumulative effect to build.
Downtime is minimal. Mild redness or small bumps at injection sites are common and usually resolve within a day or two, though individual reactions vary.
Safety Profile and Who Should Be Cautious
Polynucleotides are generally considered safe and well tolerated, supported by their long history of use in other areas of medicine before their adoption in aesthetics. That said, a few groups should approach the treatment with extra caution.
Anyone with a known allergy to fish products should disclose this clearly before treatment, given the salmon-derived origin of most PDRN products used in aesthetic clinics. People who are pregnant or breastfeeding are typically advised to wait, as is standard practice with most injectable aesthetic treatments, since safety data in these groups is limited.
As with any injectable, choosing a practitioner with proper medical training and using a registered, clinically tested product matters more than the treatment category itself. Unregulated or poorly sourced PDRN products carry the same contamination and adverse reaction risks as any injectable from an unverified source.
Setting Realistic Expectations
Results from PDRN build gradually and are generally described as subtle rather than dramatic. People expecting an immediate, filler-like transformation are likely to be underwhelmed by a single session. This gradual nature is one reason clinics offering PDRN injections in London and other major cities typically recommend a course of sessions rather than a one-off appointment.
The treatment tends to work best for people focused on overall skin quality and texture rather than those seeking to address specific volume loss or deep wrinkles. For those concerns, polynucleotides are often combined with other treatments rather than used alone.
Where to Learn More
Given how new this treatment is to mainstream aesthetics, finding a practitioner with specific experience in polynucleotide therapy is worth prioritising over simply choosing the nearest clinic. Asking which specific product is used and how many sessions a practitioner typically recommends for a given concern is a reasonable way to gauge their experience level. Oblique, a London aesthetics clinic, is one provider using established products such as Ameela and PLiNEST, both of which have a track record in clinical use.
The science behind polynucleotides is sound, but as with most injectable treatments, the outcome depends heavily on practitioner skill and appropriate patient selection.
