What polynucleotides are
Polynucleotides are purified fragments of DNA, most commonly derived from salmon or trout, injected in a gel to stimulate skin repair rather than to fill or freeze. The claimed mechanism is biological: improving hydration, elasticity and the environment in which fibroblasts build collagen. In UK clinics they are most used for the under-eye area, lower face and neck, and increasingly for skin quality across the face, sitting in the same conversation as skin boosters but positioned as regenerative.
They are not dermal fillers: they add little immediate volume, and results build gradually over a course. A typical protocol is two to three sessions, two to four weeks apart, with maintenance every six to nine months.
Typical UK prices in 2026
Observed 2026 prices run from about £250 to £450 per session, with full courses commonly £600 to £1,200. Under-eye protocols with premium products in London reach the top of the range; sessions in Manchester, Glasgow and Birmingham are often £50 to £100 cheaper for the same brands. As with all injectables, an unusually cheap syringe should raise sourcing questions, not excitement.
Where the evidence stands
The published evidence base is younger and thinner than for established injectables. There are supportive studies for skin hydration, elasticity and under-eye improvement, but they are mostly small, and larger independent trials are still accumulating. That does not make the treatment illegitimate; it makes overclaiming easy. A trustworthy practitioner presents polynucleotides as a promising skin-quality treatment with developing evidence, offers realistic percentages rather than transformations, and never presents them as a proven substitute for filler, energy devices or surgery. Marketing that leans on the word "natural" instead of data tells you something about the clinic.
How to choose a provider
- Polynucleotides are injected into facial tissue, so the standard for injectors should match filler: a registered healthcare professional whose registration you can verify. Our methodology explains the register checks we run.
- Ask which product is used. Established brands with UK distribution and safety data differ from unbranded imports; ask to see the box and batch record.
- Ask about fish allergy screening. Most products derive from fish DNA, and while purification removes proteins, screening and consent should address it explicitly.
- Expect a course plan with photographs at consistent settings, and a review after the final session.
- Ask what the practitioner expects this treatment not to do for you. The quality of that answer is the consultation in miniature.
What treatment is like
Sessions take twenty to thirty minutes with numbing cream. Expect small blebs, redness and possible bruising for a day or two, especially under the eyes. Because results depend on your own tissue response, changes appear over weeks, and photographs are the fair way to judge them. People seeking an immediate visible change from a single session are buying the wrong treatment, and should hear that from the clinic before paying.
How they combine with other treatments
Practitioners commonly sequence polynucleotides before or alongside Morpheus8 for texture and laxity, or use them where filler under the eyes would risk puffiness. These combinations are plausible and increasingly popular; they also multiply cost, so ask for the standalone plan and the combined plan priced separately, with the expected additional benefit stated for the difference.
What to verify before you book
Polynucleotide treatments are newer to the UK market than most of the injectables around them, so the quality of the provider's information matters as much as the quality of their technique. Careful providers are precise about what the product is and measured about what it does.
- Registration. These are injectable treatments delivered into the skin, so check the practitioner's professional registration yourself before booking.
- Product and regulatory status. Ask which branded product is used, where it is sourced and how it is regulated in the UK. A provider who cannot answer that has not done the reading.
- Claims discipline. Be cautious of anyone describing this as a replacement for filler, a permanent fix or a proven treatment for conditions it has not been studied in.
- Course structure. Expect a defined course, usually two to four sessions two to four weeks apart, with a stated review point.
- Allergy screening. Products derived from fish DNA warrant a clear conversation if you have a fish allergy.
Aftercare and the results timeline
Small bumps at the injection points usually settle within hours to a day, and bruising is possible, particularly under the eyes. Providers commonly advise avoiding makeup for the rest of the day, no strenuous exercise, saunas or facial massage for 24 to 48 hours, and sun protection as usual. Any change is gradual: most people notice skin quality, hydration and fine crepiness improving over four to eight weeks, with the fuller picture after a complete course. Judging this treatment a week after the first session will always disappoint.
Where the evidence sits in 2026
Interest in polynucleotides has grown faster than the published evidence base, and that is worth saying plainly on a directory that people use to make decisions. The available studies are mostly small, and the strongest practical claims relate to skin quality and hydration rather than to volume, lifting or the treatment of medical skin disease. That does not make it a poor treatment, it makes it a treatment to approach with realistic expectations and a clear course price. If a provider's marketing outruns that, treat the marketing as the warning sign rather than the product.
Find a provider near you
Verified listings are onboarding across the UK. Browse Edinburgh, Leeds and the rest of our city guides, and apply the checklist above wherever you book.