Dr. Burak GümüşçüAesthetic & Health Technologies
Regenerative Aesthetics

5 min read

How Polynucleotides Work: Mechanism and Limits

How polynucleotides work, how they differ from filler and what they do not promise. A short guide to the mechanism and to where the evidence actually sits.

Answers to how polynucleotides work are usually more certain than they should be. This is a relatively new field, and an honest answer has to describe the mechanism while also saying where the evidence sits. This article handles both together.

What are polynucleotides?

Short answer: Polynucleotides are DNA fragments purified from salmon. Given into the skin, they are thought to support tissue repair processes and the retention of moisture.

The word "thought" is deliberate here. The field is new and the account of the mechanism should be framed more cautiously than a claim of definite effect.

The source being fish also decides who the treatment is not used for; it does not come onto the agenda in people with a known allergy to fish-derived products.

How does it differ from filler?

Filler adds volume; material is placed in the area and the difference is seen at the moment of treatment. Polynucleotides are not used to add volume.

What is targeted is the quality of the tissue itself. The aim is not to fill the area but to support the tissue's own condition, which is why the result reads gradually.

That distinction is also the source of the most common wrong expectation. Someone expecting volume forms the impression that "nothing happened" in the first days; is salmon DNA a filler is covered separately.

How is it applied?

Superficial micro-injections are made into the skin with fine needles. It is a technique working at the surface rather than at depth, and it varies by area.

Temporary bumps and redness at the injection points are ordinary. These findings belong to the needle entry and fade quickly.

The technique also changes with the area treated. The approach in a thin-skinned area such as under the eyes is not the same as on the cheek or neck.

The number of sessions and the interval are planned for the person; it is generally thought of as a series rather than a single session.

Where does the evidence sit?

Short answer: This field is relatively new and there is no institutional patient guide for the treatment itself. Saying so does not mean advising against it; it means setting the expectation correctly.

Caution is called for in a field where the information sources are limited. An account promising a definite result does not match the field's own situation.

That does not mean the treatment should not be carried out either. What it means is this: the language of promise should be measured, and people should decide having heard what is known and what is not.

Being able to verify that the product is licensed matters for the same reason. In Türkiye, drug and medical device licensing is handled by TİTCK.

Which complaints does it come up in?

It is considered in people describing thinning under the eyes, fine lines and tired-looking skin.

What those complaints share is relating to tissue quality rather than volume loss. In a picture where the source is volume loss this treatment does not deliver the expected change.

In most pictures the two are present together and the proportion varies. Expecting a full result from a single treatment in such a picture is not realistic, and that is said at the outset.

The distinction is made at examination. A method chosen without establishing the source is usually the wrong one.

When is the result read?

The effect is gradual. Expecting a difference on the day of treatment does not match how this treatment works.

The change reads over weeks and is assessed once the series is complete; when results show is covered separately.

That gradual course can be too slow to notice in daily glances; keeping photographs is the most practical way to follow it.

Who is it not used for?

Short answer: It is not used during pregnancy and breastfeeding, where there is a known allergy to fish-derived products, where there is active infection in the area, or during an active phase of an autoimmune condition.

In people taking blood thinners the decision is not made alone; whether the medicine can be stopped is a decision for the doctor who prescribed it.

These are asked about from the outset, and information emerging later means a planned session is cancelled; who should avoid it is gathered separately. The treatment's own page sits under salmon DNA.

Frequently asked questions

Is it really fish DNA? Polynucleotides are DNA fragments purified from salmon. The product goes through purification processes, but because the source is fish it is not used in people with a known allergy to fish-derived products. That information is asked about from the outset and is never skipped.

Does it add volume like filler? It does not, and that distinction has to be discussed at the outset. What is targeted is tissue quality; the aim is to support the tissue's own condition rather than to fill the area. In a picture of volume loss it does not deliver the expected change, and the source is established at examination.

Is the effect proven? This is a relatively new field and there is no institutional patient guide for the treatment. That needs saying plainly; an account promising a definite result does not match the field's own situation. Setting the expectation in that frame is the most honest approach available.

Is one session enough? It is generally planned as a series rather than a single session. The number and the interval are set for the person and cannot be given before examination. The result of the first session decides the next step, and that assessment is made weeks later once the series is complete.


If you would like to talk through the source of your complaint and whether this treatment suits you, the consultation assesses the area by examination.

This article is for general information and is not medical advice. Assessment and treatment decisions follow a medical examination; results vary between individuals.

References

  1. Skin ageing — DermNet
  2. Before you have a cosmetic procedure — NHS
  3. Türkiye İlaç ve Tıbbi Cihaz Kurumu (TİTCK)