Polynucleotides are long chains of nucleotides – the same basic units that make up DNA and RNA – and in aesthetics they are usually purified DNA fragments (often from salmon or trout) used to stimulate skin repair and regeneration.

Quick Scoop: What are polynucleotides?

In pure biology terms, a polynucleotide is a biopolymer made of many nucleotides joined together in a chain. DNA and RNA are classic examples: DNA is basically two polynucleotide strands twisted into the famous double helix.

In today’s skincare and aesthetics world, “polynucleotides” usually means injectable treatments using highly purified DNA fragments (commonly from fish such as salmon or trout) designed to boost the skin’s own repair mechanisms rather than simply filling or freezing lines.

How they work (skin treatments)

When injected into the skin, polynucleotides act as biostimulants that nudge your cells to behave in a more youthful, regenerative way. Clinics and patient leaflets describe effects such as:

  • Stimulating fibroblasts, the cells that make collagen and elastin, for firmer, more elastic skin.
  • Improving hydration by attracting and binding water in the dermis, leading to plumper, dewier skin.
  • Supporting tissue repair after sun damage, inflammation, or scarring, and helping overall skin quality and texture.
  • Calming low‑grade inflammation and helping protect against oxidative stress, which contributes to visible ageing.

In simple terms, instead of “painting over the cracks”, polynucleotide treatments try to improve the wall itself.

Where they’re used

Originally, polynucleotides were a lab and medical tool: DNA/RNA chains used in experiments like PCR and sequencing, or in broader regenerative medicine. Over the last few years they’ve moved into mainstream aesthetics as a non‑filler, regenerative injectable:

  • Face (fine lines, crepey or “tired” skin).
  • Under‑eye area for hollows and dark circles (a very popular indication in clinics right now).
  • Neck and décolletage for laxity and texture.
  • Sometimes hands or other body areas with thinning, sun‑damaged skin.

Treatments are usually done as a course of sessions, with gradual results over weeks as the skin remodels.

Why they’re a trending topic now

Over roughly 2024–2026, polynucleotides have become a buzzword in clinics, social media, and beauty forums as “the next big thing” in regenerative aesthetics, often positioned as a more natural‑looking alternative or complement to traditional fillers and wrinkle‑relaxing injections. Many clinic blogs highlight:

  • The “regenerative, not just cosmetic” angle – helping tissue quality from within.
  • Fish‑derived DNA that’s purified and sterilised to medical standards to be compatible with human tissue.
  • Use alongside other treatments (like microneedling, lasers, or toxins) in personalised skin plans.

Online forum discussions often revolve around whether they “actually work” versus the hype, experiences with bruising or downtime, and how they compare to well‑known options like hyaluronic acid skin boosters.

Safety, caveats, and questions to ask

Reputable medical sources and patient leaflets stress that, although polynucleotide injectables are widely used and generally considered safe when performed by trained professionals, they are still medical procedures with possible side effects such as swelling, bruising, tenderness, and rare complications. They also note:

  • You should have a proper consultation, a cooling‑off period, and a practitioner registered with a professional body.
  • Results are gradual and not guaranteed; response varies by age, skin status, and lifestyle.
  • People with fish allergies or certain medical conditions may not be suitable candidates, so full medical history disclosure is important.

If you’re considering treatment, the key questions are: What specific product is being used, what evidence supports it, who is administering it, and what is the realistic outcome for your skin?

Simple example

Imagine your skin as a tired garden: fillers are like placing decorative stones to hide bare patches, whereas polynucleotides are more like improving the soil so the plants themselves can grow stronger over time.

TL;DR: Polynucleotides are long chains of nucleotides (like DNA and RNA); in aesthetics, they’re purified DNA fragments, often from salmon or trout, injected to stimulate natural skin repair, boost collagen and elastin, and improve hydration and texture, and they’ve become a big talking point in regenerative skincare in the last couple of years.

Information gathered from public forums or data available on the internet and portrayed here.