Polynucleotides: The Skin Treatment Everyone’s Asking About (And Whether It’s Right For You)
“Barely a week goes by without a client asking me about polynucleotides. And honestly? The curiosity is warranted. This isn’t a filler. It’s not a booster in the traditional sense. It’s something your skin actually uses to repair itself — we’re just giving it more to work with.”
If your feed has been full of before-and-afters lately and you’re wondering what polynucleotide treatment actually does — and whether it lives up to the hype — you’re in the right place. I’m going to walk you through everything: what they are, what the treatment involves, what results to realistically expect, and who they’re genuinely suited to.
No fluff. Just the honest version — the way I’d explain it to you across the treatment bed.
What are polynucleotides?
Polynucleotides are the structural components of all living organisms — the essential building blocks of DNA itself. We incorporate them into our clients’ skin journeys because of their profound regenerative benefits. As potent biostimulators, they repair tissue, stimulate collagen production, and enhance skin elasticity by working at a cellular level to encourage the skin to rejuvenate itself naturally.
Typically extracted from purified salmon or trout DNA, polynucleotides are highly compatible with human tissue — the molecules are rigorously purified to remove any proteins that could trigger an immune response. What remains is a substance structurally very similar to our own DNA, which is precisely why the skin accepts and responds to it so well.
When injected, they safely trigger the body’s natural regenerative healing responses. The result isn’t volume. It’s genuine regeneration — improved skin quality that looks like your skin, just better.
How are polynucleotides different from skin boosters?
This is one of the most common questions I hear — and it’s a good one, because the treatments are often lumped together when they’re actually doing quite different things.
Injectable hyaluronic acid — primarily deliver deep hydration. HA attracts and holds moisture in the dermis. Excellent for plumpness and immediate glow.
Biostimulators — actively improve fibroblast activity, enhance collagen synthesis, reduce inflammatory signalling, and boost the skin’s own natural HA production. An additional therapeutic punch.
Skin boosters are excellent for deep hydration and immediate plumpness. Polynucleotides go further — beyond hydration, they actively improve fibroblast activity, enhance collagen synthesis, and reduce inflammatory signalling, all while stimulating your skin to produce its own natural hyaluronic acid. It’s not either/or; there are clients for whom a combination approach makes sense. But they’re not the same thing, and knowing the difference helps you make better decisions about your skin.
How do polynucleotides work? (The honest science, without the jargon)
Polynucleotides are administered beneath the skin’s surface using a fine needle. Rather than adding volume like traditional fillers, they act as biostimulators — specifically targeting the fibroblasts. These cells are crucial for collagen production and for correcting the dysregulated signalling that often contributes to poor skin quality.
This process encourages the skin to regenerate from the inside out, promoting the synthesis of collagen and elastin while improving the condition of the extracellular matrix — the ECM. Here’s an analogy that tends to make this click:
The dining room — everything guests see when they walk in — is your epidermis: the surface, the glow, the texture. What most people don’t realise is that everything that makes the dining room look good is produced entirely in the kitchen below. That kitchen is your dermis.
The chefs are your fibroblasts — the cells responsible for producing collagen, elastin, and hyaluronic acid. The raw ingredients they work with are your skin’s structural proteins. And the extracellular matrix — the ECM — is the kitchen itself: the countertops, the prep stations, the infrastructure that makes production possible.
When we’re young, the kitchen runs like a Michelin-starred operation. Everything’s firing. The brigade is fully staffed, the ingredients are fresh, and the dining room reflects it. But as we age — with sun damage, stress, and inflammation thrown in — the kitchen quietly falls apart. Chefs leave and aren’t replaced. The equipment degrades. The ingredients run low. The dining room starts to suffer, not because anything’s been taken away from the front of house, but because the kitchen simply isn’t producing anymore.
Most aesthetic treatments work front of house — they rearrange the furniture, bring in temporary décor, make the dining room look better for a while. Polynucleotides go straight to the kitchen. They act as the new head chef: rallying the brigade, restocking the larder, repairing the equipment, and setting the whole operation running again. The result shows in the dining room — but the work happened in the kitchen.
The result is significantly boosted hydration, reduced inflammation, and improved texture, tone, and firmness — leading to a visible reduction in fine lines and wrinkles over time. Polynucleotides also act as scavengers for free radicals — the unstable molecules that accelerate skin ageing — providing an extra layer of protection alongside all the regenerative benefits.
Fibroblasts are signalled to multiply and get back to work — restoring the cells that actually build your skin.
Recycled DNA building blocks are delivered to the kitchen, giving the team raw materials to produce fresh collagen and elastin.
Inflammation is reduced and free radicals neutralised — stopping the ongoing breakdown of the infrastructure your skin depends on.
What does a polynucleotide treatment actually involve?
At UDB Skin Clinic, every polynucleotide treatment starts with a proper consultation — not a five-minute chat. We use our MEICET AI skin analysis scanner to take a detailed baseline reading of your skin: hydration levels, elasticity, pigmentation, texture. This data shapes the entire treatment plan and gives us something concrete to measure progress against.
At UDB we use PLINEST — a medical-grade polynucleotide by Mastelli using PN-HPT™ technology. A sterile viscoelastic gel, 40mg per 2ml, administered intradermally with ultra-fine 30G needles. The treatment takes around 30–45 minutes. Downtime is minimal — some redness and minor pinpoint marks for 24–48 hours.
Baseline established. Treatment plan confirmed. First polynucleotide session delivered.
Cellular repair deepening. Hydration visibly improving. Skin beginning to respond.
Full regenerative response. This is where the results become clearly visible.
Sustain and build on your results. Many clients treat this as their regular skin MOT.
Polynucleotides under the eyes — does it actually work?
This is probably the question I get most. And my honest answer: for the right person, yes — it works better than almost anything else I offer for the under-eye area.
The skin under the eye is incredibly thin. It doesn’t respond well to heavy fillers — overfill that area and you risk the Tyndall effect (a bluish tinge under the skin) or puffiness that simply doesn’t sit right. Polynucleotides work differently. Instead of adding volume, they improve the quality of the skin itself — increasing hydration, reducing dark circles caused by skin transparency, and gently tightening very fine lines.
It’s not a miracle fix for deep hollowing or structural bone loss — I’ll always tell you that honestly in your consultation. But for clients experiencing early under-eye hollowing, dark circles linked to skin thinning, or crepiness in the periorbital area, polynucleotides are genuinely one of the most effective options available.
“I had a client in her early forties who’d tried every under-eye cream going. Three sessions of PLINEST later, she messaged me a photo. No filter. That’s what happens when you treat the skin rather than trying to mask what it’s doing.”
How long do polynucleotides last?
Results build gradually — this isn’t a treatment where you walk out looking different. The cellular regeneration process takes time, and visible improvement typically becomes clear around weeks 3–5 after your first session, with the full result showing after your third.
Longevity varies depending on age, skin condition, sun exposure, and whether you’re supporting the treatment with a proper homecare routine. In-clinic treatments and daily homecare are equally important — one without the other limits your results.
Do polynucleotides work? What results can you realistically expect?
Polynucleotides work — but they work differently to the instant results people are used to seeing on social media. What clients typically notice after a full course of three sessions:
- ✓Skin feels more hydrated and plump from within — not filled, but genuinely healthier
- ✓Fine lines visibly softened, particularly in delicate areas like under the eyes and around the mouth
- ✓Improved skin tone and reduction in dullness caused by poor cell turnover
- ✓For clients with acne scarring — measurable improvement in texture and surface quality
- ✓An overall skin quality improvement that makes everything else — your homecare, your SPF, your serums — work better
At UDB we use MEICET AI skin analysis to measure your baseline before treatment and track changes across sessions. That data — hydration scores, elasticity readings, pigmentation analysis — means we can show you exactly what’s changed. Not ask you to trust your mirror.
Polynucleotide treatment cost — what should you expect to pay?
Polynucleotide treatment prices in London vary — typically anywhere from £200 to £500+ per session depending on the clinic, the product used, the area being treated, and who’s administering it.
Look beyond the price point. Is there a proper consultation included? Is your skin being assessed before treatment? Are they using a verified medical-grade product? Are results being tracked? A lower price that skips the assessment, uses an unknown product, and offers no follow-up isn’t the bargain it appears.
For current UDB pricing, head to our treatment page or get in touch to book a consultation.
Why PLINEST — and why the product matters
Not all polynucleotide products are equal. PLINEST by Mastelli uses PN-HPT™ technology — a patented process producing highly purified, long-chain polynucleotide molecules in a viscoelastic gel base. That viscosity matters: it helps the product integrate properly into the dermis and stay where it’s placed.
I chose PLINEST because the clinical evidence is strong, the manufacturing standards are rigorous, and I’ve seen consistent, predictable results in my clients. In a market where ‘polynucleotide’ can mean a lot of different things, product selection isn’t a minor detail.
Is polynucleotide treatment right for you?
Polynucleotides suit a wide range of clients — particularly those who want results that look like their own skin, just better. They’re well suited to:
- →Anyone from their late twenties onwards noticing early changes in skin quality — loss of bounce, early fine lines, dullness
- →Clients with under-eye concerns: hollowing, dark circles linked to skin thinning, crepiness
- →Those looking to improve skin quality ahead of or alongside other treatments
- →Clients with acne scarring looking for a regenerative, not just surface-level, approach
- →Anyone who wants natural-looking results — improved skin, not altered features
Polynucleotides are not suitable during pregnancy, for anyone under 18, or for those with a known hypersensitivity to fish-derived products. Your consultation will cover your full history before any treatment is planned.
“The clients I see getting the best results are the ones who approach polynucleotides as a programme, not a one-off. Three sessions, proper homecare alongside it, and the commitment to maintain. That’s when the skin really transforms.”
Book a consultation at UDB Skin Clinic in Bow, East London. We’ll assess your skin with our MEICET AI analysis and build a plan around what you actually need — no pressure, no guesswork.
Book your Treatment View polynucleotide treatment →UDB Skin Clinic · 440 Roman Road, Bow, London E3 · udbskinclinic.com
— Monique x
