The under-eye area is one of the most searched-about and, I'd say, one of the most misunderstood parts of the face. People come in having read about polynucleotides for under eyes and hoping for a single treatment that erases dark circles, smooths crepey skin and lifts a hollow all at once. The honest answer is more nuanced than that — so let me talk you through what this treatment genuinely does, what it doesn't, and how to tell whether it's right for you.
Why the under-eye area is so tricky
The skin here is the thinnest on the face, with very little underlying fat or oil to cushion it. That's why it shows tiredness, dehydration and the earliest signs of ageing before anywhere else. It's also why "dark circles" aren't one single problem. They can come from thin skin that lets the underlying blood vessels show through, from genuine pigmentation, from a shadow cast by a hollow tear trough, or simply from genetics and lifestyle — and often from a combination. No single treatment addresses all of those causes, which is exactly why a proper assessment matters more here than almost anywhere else on the face.
What polynucleotides actually are
Polynucleotides are a regenerative skin treatment — sometimes grouped under the "skin booster" umbrella — made from purified fragments of DNA. Rather than filling or freezing anything, they work by supporting the skin's own repair processes: improving hydration, encouraging better tissue quality and helping the skin behave a little more like its younger self. In other words, they're about skin quality rather than volume. If you've read my piece on why 2026's biggest shift is treating the skin rather than just filling it, this sits squarely in that camp.
What they can realistically do for the under-eye
Where polynucleotides tend to help most is with the quality of the skin itself. Realistically, over a course of treatment, that can mean:
- Smoother, better-hydrated skin with less of that dry, crepey texture.
- Softer fine lines in the area, as skin quality gradually improves.
- Some improvement in the look of dark circles where the underlying cause is thin, poor-quality skin rather than pigment or shadow.
- A fresher, less tired appearance overall — though it builds slowly and subtly rather than transforming the area overnight.
The key word throughout is gradual. This is a regenerative approach, so the changes come as your skin responds over weeks, not the moment you leave the clinic.
What they can't do
Being straight with you matters more than overselling. Polynucleotides will not "fill" a hollow tear trough — if the real issue is lost volume creating a shadowed groove, that's a structural concern, and a carefully placed dermal filler is the more appropriate conversation (one we'd only have after assessing whether you're suited to it). They also won't lighten true pigmentation, and they can't undo the genetic or lifestyle factors behind some dark circles. Anyone promising that a single skin booster erases every type of under-eye concern isn't giving you the full picture.
What a course actually looks like
Under-eye polynucleotides are usually done as a short course rather than a one-off — commonly a small number of sessions spaced a few weeks apart, with occasional maintenance afterwards. The treatment itself involves tiny injection points in the area, and most people find any redness or minor swelling settles quickly. Because it works with your own biology, results appear progressively across the course. I'll always set out a realistic plan and timeline for you at consultation rather than quoting a fixed "before and after".
Who it suits — and who it doesn't
It tends to suit people with thin, crepey or dehydrated under-eye skin, or those wanting a natural, regenerative option rather than filler. It isn't right for everyone, and there are circumstances — including pregnancy and breastfeeding, and certain medical conditions — where I wouldn't proceed. That's not a formality: it's why every treatment starts with a face-to-face consultation and a proper suitability assessment. Sometimes the most useful outcome of that conversation is deciding a different approach fits better, whether that's Profhilo for broader skin quality, PRP, or something else entirely.
The best under-eye result usually comes from matching the treatment to the actual cause — not from chasing whichever treatment is trending.
If your under-eye area is something you've been wondering about, the most helpful next step isn't booking a specific treatment — it's a consultation to work out what's actually driving your concern and whether polynucleotides, or something else, is the right answer for you. As always, results vary from person to person and nothing here is a guarantee; it's general information, not personal medical advice.
For prices, what a course involves and answers to common questions, see our polynucleotides under-eye treatment page.
