Exosome therapy in London: what is legal, what the evidence shows, and what it costs

Exosome therapy in the UK is a serum applied to the skin or scalp straight after microneedling, not an injection, and the questions that matter most are what the product is and where it came from. This guide is written by the team that offers exosome therapy at our clinic on Devonshire Place and reviewed by our clinician. It gives you the UK rules, where the products come from, what the trials measured, how a session and a course run, how we price it, and the questions to ask any clinic before you book.

What exosomes are, and what "exosome therapy" actually is

Every cell releases small sealed packets called extracellular vesicles, and exosomes are the smallest class, 30 to 150 nanometres across. They carry proteins, fats and fragments of RNA from the cell that made them, and in the body they are one of the ways cells signal to each other. An exosome product is not a living cell and contains no stem cells; it is the material cells have shed, collected from a culture or a tissue, purified, and usually freeze-dried into a vial.

In an aesthetic clinic the treatment has two parts. The skin or scalp is first opened with microneedling, radiofrequency microneedling or a fractional laser, which is where any discomfort and downtime come from. The exosome serum is then applied to the treated surface in the same visit, while the channels the needles made are still open. That is the whole procedure. Clinics quote about half an hour for a scalp, longer with the microneedling of a face.

Where the exosomes come from matters more than the brand name. Outside the UK and Europe many facial exosome products are grown from human stem cells, from umbilical cord, placenta or fat. In the UK and Europe the products sold for cosmetic use are described as plant-derived or animal-derived: rose or other plant cells, bovine colostrum, salmon, red deer umbilical cord cells. Some brands are described differently by different sellers, so we name the product we use, its source and its manufacturer, and show you the paperwork at your consultation.

Are exosomes legal in the UK?

The UK position has three parts:

• Topical, non-human-derived exosome products applied after microneedling are sold as cosmetics and are described by Save Face, the training provider Harley Academy and clinic doctors as the safest and most compliant route, provided the product meets cosmetic product rules, which is why we show you the product's documentation.
• Human-derived exosomes in cosmetics are banned. The Department for Business and Trade told a trade journal in November 2025: "Cosmetics containing exosomes from humans are banned in the UK." On our reading that covers products from placenta, umbilical cord, fat or foreskin.
• Injecting exosomes for aesthetic purposes is ruled out by the accreditation body Save Face, which says the medicines regulator considers injected exosomes to be medicinal products and that injectable exosome therapies have no UK marketing authorisation, a reading clinic doctors share. In the United States the Food and Drug Administration said in December 2019 that there are no FDA-approved exosome products, after serious adverse events with unapproved products; that is why the product, its source and the route all matter.

What this means for you: a clinic in the UK should be able to tell you the product's name, its non-human source and its manufacturer, show you its documentation, and confirm it is applied to the skin and not injected. We never inject exosomes, and at your free consultation we name the product we use and show you its documentation.

Does exosome therapy work? What the evidence shows

Encouraging, in the trials so far: every hair study in a 2025 review reported an improvement, and both skin trials found a better result than microneedling or laser alone. Here is the detail, with the size of each trial.

Hair. A 2025 systematic review found eleven studies of exosomes for hair loss, about 298 patients in all, two of them randomised. Every study reported improvement on at least one measure and none reported a serious adverse event. The largest placebo-controlled trial, in 85 people, combined adipose-derived exosomes, a human source that the UK cosmetics ban would cover on our reading, with microneedling and found about 35 more hairs per square centimetre at 12 weeks against 3 with placebo, after three sessions four weeks apart, the spacing we follow for hair. A 2026 review of microneedling-plus-exosome studies reported hair density rising from about 158 to 166 hairs per square centimetre at 24 weeks, about 5%.

Skin. A split-face trial in 25 people, with a product from an exosome developer, found acne scars improved 32.5% when an adipose stem cell exosome gel followed fractional laser, against 19.9% with laser alone. A split-face trial in 28 people found microneedling with an exosome solution beat microneedling with saline on wrinkle, elasticity, hydration and pigmentation measures at 12 weeks. Both used human adipose-derived products, which the UK cosmetics ban would cover on our reading, and both measured at about three months, which is when we review your skin.

What that adds up to. For hair, more hairs per square centimetre than microneedling alone in the better trials, measured at three to six months. For skin, a better result than microneedling or laser alone, measured at three months. The trials so far tested human-derived products; the serums sold in UK clinics, ours included, have not yet been trialled in the same way, so at your consultation we set out what to expect on your own skin or scalp, and we review you at three months for skin and six for hair.

Side effects, and the "dark side" people ask about

The risks divide into the ones that come from the procedure and the ones that come from the product.

From the microneedling or laser: redness, swelling, pinpoint bleeding, tingling and a burning feeling for a few days. In the hair trials these happened at the same rate in the exosome and the placebo groups, which suggests the needling, not the serum, drives them.

From the product: the serious reports each have their own feature. The US regulator's 2019 notice followed serious adverse events in Nebraska patients treated with unapproved products marketed as containing exosomes; a later review links infections to a placenta-derived product made in substandard conditions. A 2025 case series describes four women with nodules, scarring and pigmentation after unbranded exosome cosmetics were injected into their skin outside medical supervision. One review lists granulomas, pigmentation and anaphylaxis "mainly with injection". A Cambridge cell biologist has warned, in a report carried by the Guardian, that human-derived products, which are banned from UK cosmetics, carry a disease-transmission risk, and that a melanoma in the area could be made worse, which is why a mole that has changed is on our list of reasons not to treat. Safety follow-up of repeated use so far runs to about twelve months, and we review you at three months for skin and six for hair.

The serious reports sit with undocumented products and with injection. The protection is procedural: a named product, a non-human source with documentation, topical application by a trained clinician, and a consultation that rules you out if you should not have it. We name our product and show you its documentation before you book a course, and we apply it to the skin, never by injection.

Who it suits, and who it does not

Exosome therapy suits adults with early hair thinning who want to add something to microneedling, and adults who want to add to a microneedling or laser session, with realistic expectations and a budget for a course. It is not a cure for hair loss or a "stem cell facelift", and for pattern hair loss it works alongside the hair-loss medicines, which we go through at the consultation.

Who should not have it, drawn from clinic consent lists and the microneedling literature (there is no manufacturer's contraindication list for a cosmetic serum):

• Pregnancy.
• An active skin or scalp infection, a cold sore, active acne, eczema or rosacea in the area, or a mole that has changed.
• Autoimmune disease, immunosuppression, a clotting disorder, keloid scarring, or isotretinoin (Roaccutane) in the last six months, for the microneedling; the full list is the clinician's at your consultation.
• A known allergy to any component of the product, which is why we show you what is in it.

If you want injectable treatments as well, our doctor can provide them, and we time them around your course: we wait two weeks after an injectable treatment in the area and four weeks after dermal filler before treating the same area.

What a session is like, step by step

1. Consultation. The clinician examines your skin or scalp, asks about your medical history and what you have already tried, shows you the product and its documentation, and tells you whether, and how, exosomes fit your plan. You get a plan and a price in writing. Consultations and follow-up reviews are free.
2. Preparation. In our practice, numbing cream for the face if microneedling is planned, and the scalp usually treated without. No make-up or hair products on the day.
3. Microneedling. A device with fine needles passes over the area to open thousands of tiny channels. On the face this stings and the skin reddens; on the scalp most people describe pressure and prickling.
4. The exosomes. The vial is opened and the serum is applied to the freshly treated skin and worked in, in the same visit. Nothing is injected.
5. After. You leave red and a little swollen. In our experience most people go back to work the next day. Avoid sun, make-up, sweating and active skincare for a day or two, and do not wash the scalp for the period your clinician gives you.

How many sessions, when you see the result, how long it lasts

Is one session enough? For skin, one session is a single treatment, and we plan a course of three or four. For hair, we plan three to four: the placebo-controlled trial used three sessions four weeks apart.

What exosome therapy costs in London

Exosome therapy is priced per session, often as an add-on to the microneedling or laser it rides on, and hair and skin are sometimes priced the same and sometimes not.

We price exosome therapy from a starting price per session and per course, confirmed in writing at your free consultation, and we price match any comparable written quote. Consultations and follow-up reviews are free whatever you decide.

Your written price names the product, the microneedling, the number of sessions and the reviews, so you can compare like with like.

Exosomes compared with the alternatives

For skin, the alternatives we provide are radiofrequency microneedling (Morpheus8 or Genius), Profhilo and EMface. For hair, the questions people ask are about PRP, the hair-loss medicines and a transplant, which follow the table.

The Morpheus8, Genius, Profhilo and EMface columns follow our own guides to each treatment; the session and downtime rows reflect published protocols and our experience. Radiofrequency microneedling is also one of the treatments the exosome serum can follow in the same visit, and we go through which pairing suits your skin at the consultation.

Exosomes vs PRP. PRP is your own blood, spun and injected into the scalp or skin, and has more randomised trials for hair; exosomes are applied to the skin after microneedling, nothing is injected, and the product is one we name and document for you. No trial has compared them head to head, and we go through both at your consultation.

Exosomes vs minoxidil and finasteride. The medicines have the larger evidence base for pattern hair loss, and exosomes work alongside them rather than instead: they suit people who are on them, have tried them or cannot take them. We go through both at your consultation. Finasteride has had UK safety updates, which are a conversation for your prescriber.

Exosomes vs a transplant. Exosomes work on thinning hair, where there are follicles to thicken; a transplant moves hair to an area where there is none. If an area is bald, a serum will not fill it, and we will tell you so at the consultation.

How to choose an exosome clinic in London

• Ask the product's name, its source and its manufacturer, and ask to see the paperwork. If the answer is "premium exosomes" or "stem cells", walk away.
• Ask how it is applied. Topically, after microneedling or laser. If they inject it, Save Face says that is a medicinal product with no UK authorisation, and the nodules and scarring on record followed injections.
• Ask who holds the needling device and who supervises. Ours is a doctor-led team, and this guide is reviewed by Dr Marie Duggan, GMC 7488383; the clinic is CQC registered.
• Ask what the evidence is, in numbers. The numbers are in this guide: about 35 more hairs per square centimetre at 12 weeks in the largest placebo-controlled trial, against 3 with placebo. "Regrows hair" is not a number.
• Ask what the price covers. The microneedling, the vial, the number of sessions, the review.
• Listen to how the product is described. A cosmetic serum should be described as one. You will not hear "clinically proven" from us, wording the advertising regulator ruled against on an exosome skincare listing in May 2026, or "approved", since no regulator has approved an exosome product for a medical use.
• Check the reviews, and where they come from. Ours are collected through review.clinic, and the badge on this page links to them: 4.8 out of 5 from 53 reviews in October 2026, with 100% of reviewers saying the treatment was worth it.

Aftercare

Follow the written sheet your clinician gives you. In outline: no make-up, sweating, swimming, saunas or active skincare (retinoids, acids, exfoliants) until the redness has gone, usually a day or two; sun protection every day; for the scalp, no washing for the period you are given and no styling products for a day; sleep on a clean pillowcase. Tell us about spreading redness, pus, a cold sore, a lump that forms under the skin, or a patch of skin that darkens rather than fades.

Frequently asked questions