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Polynucleotides for Thinning Hair

Polynucleotides are injected into the scalp to improve the environment the follicle sits in, which is a more modest claim than the one usually made for them, and understanding the difference is the whole of a sensible decision here.

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The short answer

What this treatment is

Hair thinning brings people to a clinic faster and more anxiously than almost anything else, and that urgency is regularly exploited. It is worth being plain about where this treatment sits before describing it.

Polynucleotides injected into the scalp improve microcirculation around the follicle, reduce local inflammation and support the tissue the follicle is anchored in. There is reasonable mechanistic sense to that and a growing but still limited body of clinical evidence behind it. What there is not is good evidence that polynucleotides alone reverse established male or female pattern hair loss. They are best understood as something that improves the ground rather than something that replants it.

That makes them genuinely useful for the right person: someone with early diffuse thinning, someone whose hair has shed after illness, pregnancy or significant stress, or someone already on the medications that do have strong evidence who wants to support them. It makes them a poor purchase for someone with a receded hairline of long standing hoping to avoid a transplant.

Scalp treatment at a glance during and after your session

Session timeAbout 30 minutes
CourseUsually four sessions
IntervalTwo to three weeks apart
First changeReduced shedding, six to eight weeks
DowntimeNone, tender for a few hours
Assessed atThree to four months

Areas treated

What's included

Improves blood supply to the tissue around the follicle
Reduces the low-grade scalp inflammation that accompanies shedding
Supports hair that is thinning diffusely rather than receding
Useful after shedding triggered by illness, pregnancy or stress
Can be run alongside the medications with the strongest evidence
No daily routine to maintain between sessions

Boundaries of practice

What's not treated

Good practice means saying no when indicated:

Known allergy to fish, since the source material is salmon or trout
Pregnancy or breastfeeding, where no safety data exists for this treatment
Active skin infection, inflammation or an open wound in the area
Active autoimmune disease affecting the skin, without clinical advice first
Anticoagulant or antiplatelet therapy, which needs assessment before treating
A course of isotretinoin taken within the last six months

Patient journey

What to expect

Consultation & preparation

Stop fish oil, high-dose vitamin E and anti-inflammatory painkillers for a few days beforehand if your own doctor is content for you to, because each of them makes bruising more likely. Come with a list of what you have already had done and when, and the medicines you take. Describe what you dislike in your own words rather than naming a treatment, so the assessment starts from the problem.

During treatment

What is actually happening at the follicle

A hair follicle is a small organ with a demanding blood supply, and it cycles between growing, resting and shedding. In pattern hair loss the growing phase gets progressively shorter and the follicle itself miniaturises, producing finer and shorter hairs each cycle until it produces nothing visible. Several things drive that, of which hormonal sensitivity is the dominant one.

Polynucleotides do not act on the hormonal driver. What they do is improve the tissue conditions around the follicle: they bind water, they encourage new small vessel formation, and they damp the local inflammation that tends to accompany thinning scalps. A follicle in better-supplied, less inflamed tissue holds its growing phase better than one in poor tissue.

This is why the realistic outcome is usually described as less shedding and better calibre in the hair you still have, rather than new hair where there has been none for years. Set the expectation there and most people are pleased. Set it at regrowth and most people are not.

Who this suits, and who it does not

It suits diffuse early thinning where the hair is still present but finer than it was, particularly in women, where the pattern is usually a widening parting rather than a receding line. It suits post-partum and post-illness shedding, where the follicles are healthy and the cycle has been disrupted. It suits someone already taking a medication with strong evidence who wants to add something that works differently.

It does not suit a hairline that has receded over years, where the follicles have miniaturised past recovery, and it does not suit shiny scarred scalp where the follicle has gone entirely. In those cases the honest options are transplantation or acceptance, and injections are neither.

It is also not a first move if you have never had the cause investigated. Thyroid disease, iron deficiency and several other treatable conditions cause hair loss, and a blood test costs a fraction of a course of injections. Anyone proposing to treat your scalp without asking what is causing the problem is selling rather than assessing.

Where it sits alongside the treatments with the best evidence

Two medications have a substantial evidence base in pattern hair loss, and any honest conversation about a scalp treatment mentions them. Topical minoxidil extends the growing phase and is available without prescription. Oral finasteride acts on the hormonal driver directly and is prescription-only, with a side effect profile that needs a proper discussion with a doctor.

Polynucleotides do not replace either. They work on a different part of the problem, which is the reason they combine sensibly rather than the reason to choose between them. A practitioner who positions scalp injections as an alternative to the medications, rather than as something that sits beside them, is telling you something about their practice.

The practical version: if you have not had the cause investigated, do that first. If you are not on anything and you want to be, discuss it with a doctor. Then consider whether adding this makes sense for the kind of thinning you actually have.

Aftercare

Leave holding a written plan that names the area, the number of sessions, the intervals between them and the total cost including any review. Read it somewhere other than the clinic. A fortnight between assessment and first treatment is the interval commonly recommended for elective cosmetic procedures, and nothing about this treatment is urgent enough to shorten it.

FAQ

Common
questions

Will polynucleotides regrow hair I have already lost?

Very unlikely. Where a follicle has miniaturised past recovery or scarred over, nothing injected will bring it back. The realistic outcome is less shedding and better calibre in the hair still present. Anyone showing you regrowth photographs should be asked what else that patient was taking.

How many scalp sessions are needed?

Usually four, spaced two to three weeks apart, which is one more than a typical facial course. Hair cycles slowly, so the result is assessed at three to four months rather than eight weeks, and maintenance sessions every six months or so are common if it has helped.

Does injecting the scalp hurt?

The scalp is more sensitive than the face and numbing cream works less well through hair, so most people find this the least comfortable area treated. The injections are shallow and quick. The scalp usually feels tender for a few hours afterwards, and there is no other downtime.

Can I have this alongside minoxidil or finasteride?

Yes, and it is often the sensible combination, because they act on different parts of the problem. Polynucleotides improve the tissue around the follicle while those medications act on the growth cycle and the hormonal driver. Tell whoever treats you exactly what you are already taking.

Should I have blood tests before starting?

If nobody has investigated why your hair is thinning, yes. Thyroid disease and iron deficiency are common, treatable causes that no injection addresses. A practitioner who proposes a course without asking what is driving your hair loss is selling a treatment rather than assessing a problem.

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Polynucleotides Marylebone • UNTIL Marylebone, 1 Orchard Street, London W1H 6HJ

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