Polynucleotides for Under Eye Area
What Polynucleotides Are
Polynucleotides (PN or PDRN) are purified DNA fragments derived from salmon or trout sperm. They are processed to medical grade and used as injectable skin regenerators. The molecule is long familiar in wound healing research and has moved into aesthetic practice in the past decade.
A 2024 PMC review (11311621) described how polynucleotides stimulate fibroblast growth, support angiogenesis, and improve collagen synthesis. These effects together improve skin hydration, elasticity, and pigmentation when the product is placed under the skin.
Polynucleotides do not plump or fill. They improve skin quality from inside the tissue by supporting the cells that keep skin healthy. Patients who want to erase a hollow should look at hyaluronic acid filler or fat grafting instead.
This difference matters for the under-eye area. Dark circles caused by thin, crepey skin respond well to polynucleotide treatment. Dark circles caused by shadow from hollowing do not.
Polynucleotide injectables are approved in many countries and are available in the United States and Europe under specific brand categories. Product availability and the regulatory path vary by country. Ask your provider about the product they use and its local approval.
- Source: purified salmon or trout DNA
- Effect: skin quality, not volume
- Approval: varies by country
How Polynucleotides Work in Skin
Polynucleotide fragments bind to cell-surface receptors and trigger a repair cascade. Fibroblasts (collagen-producing cells) become more active, extracellular matrix components rebuild, and blood supply to the treated tissue improves.
The effect is not immediate. Skin quality changes develop over several weeks as cells respond to the signaling molecules. Most visible improvement appears between weeks 8 and 16 after the first session.
The periorbital region has thin skin, minimal fat, and constant muscle movement. Traditional fillers can look heavy or lumpy in this zone. Polynucleotides work at the tissue level rather than the volume level, which suits the anatomy.
The 2024 PMC review noted that the extracellular matrix repair approach matches the needs of delicate skin better than volumizing products do. This is why polynucleotides have become a targeted option for under-eye rejuvenation.
Patients typically notice smoother skin texture, better hydration, and more even pigmentation. Fine crepey lines soften. The under-eye looks less tired even when volume has not changed.
- Fibroblast activation
- Angiogenesis and tissue repair
- Improved texture and hydration
Clinical Evidence
A 2020 randomized split-face trial (PubMed 32248707) compared polynucleotide injection with non-crosslinked hyaluronic acid in 27 subjects for periorbital rejuvenation. Both sides showed comparable aesthetic improvement, but the polynucleotide side showed greater gains in skin elasticity and hydration.
This matters because it shows polynucleotides match the visible outcome of injectable skin boosters while adding measurable elasticity benefits. For patients who value skin quality, the evidence supports polynucleotides over a pure hydrator.
A 2025 PMC study (12388916) reported that the polynucleotide-treated side showed higher Global Aesthetic Improvement Scale (GAIS) scores at 16 weeks and a greater reduction in skin roughness by week 28.
The 28-week window is important. Many aesthetic studies end at 12 weeks, which misses the full regenerative response. Studies that follow patients to 6 months give a fuller picture of what polynucleotides can do.
A 2024 PMC dermatology review reported a 61.4 percent reduction in periorbital wrinkles in a study of 218 Asian subjects treated with a purified polynucleotide injectable over 12 weeks. The effect on fine wrinkles was consistent across the study population.
- 2020 RCT: elasticity and hydration gains
- 2025 study: better roughness reduction at 28 weeks
- 2024 review: 61.4 percent wrinkle reduction at 12 weeks
The Treatment Protocol
A typical polynucleotide protocol runs 3 to 4 sessions spaced 2 to 4 weeks apart. The loading phase builds the skin quality result. After the initial series, most patients return for maintenance every 6 to 9 months.
The treatment is injected into the dermis or deeper layers depending on the zone and target. The under-eye is typically treated in the mid-dermis with small aliquots to avoid lumps.
Topical numbing cream sits on the under-eye area for 20 to 30 minutes. The provider cleans the skin, marks entry points, and injects small amounts using a fine needle or cannula. Session time is usually 20 to 30 minutes.
Most patients tolerate the injections well. The product flows through a small-gauge needle without pressure. Ice after treatment limits swelling and bruising.
Small bumps and pink skin are common for several hours after injection. Bruising can appear at injection sites and usually clears within a week. Avoid exercise, sauna, and heat exposure for 24 hours. Most patients return to work the next day.
- Protocol: 3 to 4 sessions, 2 to 4 weeks apart
- Session: 20 to 30 minutes
- Recovery: next-day return to normal activity
Combining Polynucleotides With Other Treatments
A 2025 MDPI Polymers paper described combination injectables pairing polynucleotides with non-crosslinked hyaluronic acid. The combination targets skin quality and light hydration together and showed synergistic effects in tissue repair studies.
In practice, many providers alternate polynucleotide sessions with skin-booster hyaluronic acid sessions or combine them into a single session. The choice depends on skin type and the balance of texture vs hydration needs.
If you have both hollowing and skin-quality issues, your provider may combine tear-trough filler (for volume) with polynucleotide sessions (for skin quality). Filler goes first to establish shape; polynucleotides refine the overlying skin.
This combination suits patients whose under-eye problem has two causes. Treating only one leaves the other visible.
Radiofrequency microneedling and fractional laser can be paired with polynucleotides to layer regenerative effects. Most providers space these treatments at least 2 weeks apart to let the skin recover between procedures.
- HA combination: targeted skin quality plus hydration
- Filler combination: for volume plus skin
- Energy device pairing: layered rejuvenation
Safety and Side Effects
Clinical trials have reported a low-risk profile with minimal adverse effects. Most reactions are limited to injection site swelling, redness, and mild bruising.
Patients with fish or seafood allergies should discuss the product source with their provider. Although allergic reaction to purified polynucleotides is rare, the origin is worth knowing.
Pregnant or breastfeeding patients, patients with active infection in the treatment zone, patients with autoimmune disease in a flare, and patients allergic to polynucleotide ingredients should wait or choose a different treatment.
If you have bleeding disorders or take anticoagulants, discuss your situation with the provider before scheduling. Bruising risk is higher and may affect timing around events.
The result is subtle and gradual. Under-eye skin looks smoother, hydrated, and a touch brighter. Dark circles from poor skin quality fade. The change is more visible in photos over time than in the mirror day to day.
- Low overall adverse effect rate
- Avoid with active infection, pregnancy, autoimmune flare
- Result is gradual, not dramatic
Patient Questions About Polynucleotides
Only if the dark circle is caused by thin, crepey, or pigmented skin. If shadowing comes from hollowing or from the underlying vascular anatomy, polynucleotides alone will not change the appearance. A careful assessment separates the causes.
Skin boosters mainly hydrate. Polynucleotides trigger repair at the cellular level in addition to hydration. Studies show better elasticity and roughness reduction with polynucleotides at 28 weeks, so the results are different even when short-term appearance looks similar.
Often yes. Many providers combine them because botulinum toxin handles dynamic lines and polynucleotides handle skin quality. Each targets a different issue, and the two can complement each other when planned thoughtfully.
Single sessions typically run several hundred dollars depending on region and product. A full initial series of 3 to 4 sessions costs a similar range per session. Maintenance sessions continue at this rate. Confirm session count and total cost at consultation before starting.
Patch testing is not standard for polynucleotide injectables because serious reactions are rare. That said, a careful provider takes a thorough allergy history, particularly around fish and seafood, and can skin-test on request if you have concerns.
Skin quality gains fade over 6 to 12 months without maintenance. The skin does not worsen below its pre-treatment baseline. Many patients pause treatment, see how much of the benefit stays, and then decide whether and when to come back.
No. Polynucleotides do not remove fat pads or address herniated orbital fat. If puffiness is the main complaint, you may need energy-based tightening or surgical correction. Polynucleotides are a fit for skin quality, not for fat-pad prominence.
Next Steps
Book a consultation with a provider who offers polynucleotide injectables and can map the cause of your under-eye concern. Ask which specific product they use, how many sessions they recommend, and what result to expect at 12 and 28 weeks. Match your expectations to the evidence, and you will know whether polynucleotides fit your case.