Polynucleotides
5 min readPolynucleotides for Acne Scarring and Rosacea-Prone Skin
Educational reading for licensed practitioners — not clinical or injection guidance.
Two of the most stubborn concerns in the clinic — atrophic acne scarring and reactive, rosacea-prone skin — share an underlying theme: disordered repair and low-grade inflammation. That overlap is why polynucleotides, a regenerative category better known for skin quality, have drawn interest for both. The rationale is sound, but the limits matter as much as the promise.
The Repair-and-Calm Rationale
Polynucleotides work by supporting the skin's own biology rather than filling or resurfacing. Once placed in the dermis they are understood to stimulate fibroblasts, encourage angiogenesis, hold water in the tissue, and exert antioxidant and anti-inflammatory effects. For scarred skin, the interesting part is fibroblast support and dermal remodelling; for reactive skin, it is the calming, barrier-supporting side of that profile. In both cases the aim is a better-quality, more resilient dermis over a course of treatment — not an overnight fix.
Atrophic Acne Scars
Atrophic scars are depressions left where the dermis failed to rebuild after inflammatory acne. They are notoriously multifactorial, and no single modality resolves them. Polynucleotides contribute by supporting collagen-producing cells and improving the overall quality and thickness of the surrounding skin, which can soften the appearance of shallow, rolling irregularity as part of a wider plan.
The PDRN-based Rejuran range is the product most associated with textural and acne-scar work, and Rejuran i is positioned for finer, more superficial placement. Ranges such as Plinest, Croma PhilArt and PolyPhil are also used for skin-quality improvement around scarred areas. Where scars are the primary target, polynucleotides are usually combined with a resurfacing or collagen-induction step — most commonly microneedling — rather than used alone.
Rosacea-Prone and Reactive Skin
Rosacea is a chronic inflammatory condition with a vascular component (redness, flushing, visible vessels) and a sensitivity component (a compromised, reactive barrier). Here the framing has to be careful. Polynucleotides are not a treatment for the vascular redness of rosacea, and they are not a cure for the condition. What their anti-inflammatory, antioxidant and barrier-supporting profile may offer is help with the resilience and comfort of chronically reactive skin, used conservatively and at the right time.
Timing is everything. Injecting into actively inflamed or flaring skin is inappropriate — active inflammation at the treatment site is a standard contraindication. In practice, any regenerative approach in rosacea-prone patients belongs to quiet periods, with gentle technique and modest expectations, and often as an adjunct to proper medical management of the rosacea itself.
Combining Sensibly
- Scars: polynucleotides plus microneedling is a coherent, compliant pairing that addresses both the repair signal and the mechanical remodelling. Sequence and spacing should respect healing.
- Reactive skin: lead with barrier repair and medical control; introduce polynucleotides cautiously during stable phases rather than during flares.
- Patient selection: most polynucleotides are fish-derived, so fish allergy must be screened. Standard injectable exclusions — active infection, bleeding disorders, pregnancy and lactation — apply throughout.
It is worth restating for honesty and compliance: no injectable polynucleotide or PDRN product, Rejuran included, is FDA-approved. These are CE-marked products used internationally, and the evidence in scarring and inflammatory skin is still developing. Claims should stay measured — support and improvement, not cure.
Setting a Realistic Timeline
Neither concern responds overnight, and both reward patience over intensity. Because polynucleotides work by supporting the skin's own repair rather than by mechanically resurfacing it, change accrues across a course and in the weeks after it — typically a short series of sessions spaced two to three weeks apart, with maintenance later in the year. For scars in particular, the most honest counselling frames the goal as softening and improving the appearance and quality of the area, not erasing established depressions; deep ice-pick or tethered scars often need dedicated resurfacing, subcision or energy-based work that polynucleotides support rather than replace.
For reactive skin, "less is more" is the operating principle: conservative volumes, gentle technique, wider spacing, and a willingness to pause the regenerative element entirely if the skin flares. In both settings, photographs at baseline and honest interval reviews do more to keep expectations grounded than any single dramatic promise.
The Takeaway
Polynucleotides have a defensible place in both settings: as a repair-supporting adjunct within a multi-step plan for atrophic acne scars, and as a cautious, resilience-oriented option for stable rosacea-prone skin. They are not a standalone scar eraser and not a treatment for rosacea's redness. Used with careful timing, sensible combinations and honest counselling, they earn their place — overstated, they disappoint.
Explore the polynucleotide injection range for texture and repair protocols.