Polynucleotides: effects, science & why they visibly change the skin

Polynucleotides are among the most effective innovations in modern aesthetic medicine. While many treatments work mainly on the surface, polynucleotides act exactly where skin quality arises: deep in the dermis, on the cells that keep our skin firm, resilient and healthy. They are regarded as regenerative, anti-inflammatory and tissue-strengthening – and they change not only the appearance but the structure of the skin. But how exactly do polynucleotides work, and why have they been so celebrated in recent years?

The basics: what are polynucleotides, exactly?

Polynucleotides (PN or PDRN) are highly purified DNA fragments obtained from fish milt and processed sterile in an elaborate procedure. The result is a substance that is biocompatible, well tolerated and highly effective. Their aim is not to create volume or fill wrinkles, but to regenerate the skin and return it to a state in which it can stabilise and renew itself. Polynucleotides owe this effect to their influence on cellular repair processes. They support the body’s own healing capacity and act not only cosmetically but biologically – an important difference from classic fillers.

Polynucleotides act deep on cell regeneration and tissue repair – a real game changer for skin quality.

How do polynucleotides work? — The key mechanisms

The effect of polynucleotides rests on a number of mechanisms that interlock and reinforce one another. Central is their ability to stimulate fibroblasts – the cells that produce collagen, elastin and other structural proteins. When these cells work more actively, the density, firmness and elasticity of the skin visibly improve. In addition, polynucleotides increase microcirculation. More oxygen and nutrients reach the tissue, which further promotes regeneration. At the same time they have an anti-inflammatory effect, which brings enormous relief especially for sensitive or reactive skin types. People with rosacea, thin skin or post-inflammatory irritation often report calmer, more stable skin after just a few treatments. Another decisive aspect is the ability of polynucleotides to bind water and distribute it in the skin. They do not create conspicuous fullness, but deep, even hydration that strengthens the skin barrier and reduces dryness lines. This creates that typical, healthy, fine-pored glow that is perceived as very natural.

1. Stimulation of fibroblasts

Fibroblasts are the cells that produce collagen and elastin. Polynucleotides activate these cells – not artificially, but in a regulating way. The result:

• improved collagen formation
• more elastic, denser skin
• finer pores and a smoother surface

Depending on the protocol, structure and firmness visibly improve after 2–3 sessions.

2. Improved hydration

Polynucleotides bind water – similar to hyaluronic acid, but deeper and for longer. Thanks to their structure, they can distribute and hold water in the tissue better. The effect:
Long-term moisture, without the typical “hyaluronic glow”, but with naturally plumped, healthy skin.

3. Anti-inflammatory effect

Many skin problems are caused by silent inflammation – e.g. in:

• rosacea
• acne
• dermatitis
• a weakened skin barrier

Polynucleotides measurably reduce this inflammatory activity. The result: calmer, more stable skin.

4. DNA repair & protection against oxidative stress

Polynucleotides support the cells’ repair mechanisms and protect against damage caused by free radicals.

Polynucleotides act like a repair programme for stressed skin – they stabilise, soothe and renew from within.

5. Improved microcirculation

Through better local blood flow, the skin receives:

• more oxygen
• more nutrients
• faster regeneration

This explains the “healthy skin effect” for which polynucleotides are known.

Who are polynucleotides suitable for?

Polynucleotides are suitable for almost all skin types, but people whose skin is sensitive, becoming thinner or structurally weakened benefit in particular. Fine lines, loss of structure, dark circles under the eyes, dull or dry skin and the first age-related changes respond very well to polynucleotides. Patients who have already received a lot of hyaluronic acid and want an improvement in skin quality rather than additional volume also find a natural alternative here. Polynucleotides do not plump but regenerate – an approach that integrates harmoniously into any modern, minimally invasive treatment.

Particularly suitable for:

• skin that is becoming finer and thinner
• first fine lines or loss of structure
• tired, dull-looking skin
• dark circles under the eyes
• sensitive or inflamed skin
• acne scars or lines
• skin that has already received a lot of hyaluronic acid and needs “quality instead of fullness”

They are considered extremely well tolerated – even on sensitive or reactive skin.

What the treatment involves

A treatment with polynucleotides usually takes 20–30 minutes and is carried out with microinjections.

Typical procedure:

1. cleansing & disinfection
2. optional: numbing cream
3. microinjections (area technique or focus areas)
4. soothing final care

Mild swelling or small wheals are normal and subside quickly.

Recommended protocol:
→ 3 treatments at intervals of 2–3 weeks, followed by 1 top-up every 4–6 months.

Results: when do you see the effect?

The effect builds up step by step, but develops very lastingly. Many patients notice a calmer complexion and more radiance after just one to two weeks. After four to six weeks, finer texture, smoother lines and a more even surface appear. The strongest structural effects develop within two to three months and, with regular top-ups, last for many months. The recommended protocol consists of three sessions at intervals of two to three weeks. After that, one top-up every four to six months is enough to keep the regenerative activity stable.

• after 1–2 weeks: more glow, calmer skin
• after 4–6 weeks: finer texture, fewer fine lines
• after 2–3 months: clearly more density & firmness

The results build up slowly, but lastingly.

Polynucleotides bring the skin back to its ideal state – not artificially, but in a biologically meaningful way.

Side effects & safety

Polynucleotides are regarded as very safe. Because they are biocompatible, side effects are usually only very mild and short-lived – small swellings after the microinjections, localised redness or minimal haematomas are the most common reactions. For sensitive or reactive skin types, polynucleotides are among the best-tolerated options in aesthetic medicine. Serious side effects are extremely rare, as the substance is biocompatible and anti-inflammatory.

Conclusion: polynucleotides are one of the best treatments for real skin quality

Polynucleotides are among the few treatments that not only improve appearance but strengthen the skin in its function. They soothe, hydrate, repair and stimulate natural regeneration. This makes them suitable both for early prevention and for visible refinements — and they offer a solution for anyone who wants to do something for their skin in a natural, subtle and yet far-reaching way.

Their effect is not a quick fix but a long-term improvement that returns the skin to a state in which it looks more resilient, smoother and more radiant.