Who should not have exosome therapy
The groups for whom exosome treatments are inadvisable in the UK, the conditions that should stop a course before it starts, and why an unlicensed preparation changes how a contraindication list has to be read.
Published independently. Last reviewed 2026-07-31. Information only. This site is not a clinic and gives no medical advice.
Exosome preparations are not licensed medicines in the UK, so no manufacturer has published a regulator approved list of contraindications for injection. That absence is itself the finding. Where a licensed drug tells you who must not take it, here nobody has had to answer the question.
In practice a reasonable clinic will decline to treat during pregnancy or breastfeeding, over active infection or inflamed skin in the treatment area, where a diagnosis for hair loss has not been made, and where a person cannot be given a straight answer about what is in the vial. Anyone who is offered the treatment without being asked a single one of these questions has learned something about the clinic.
Why this list works differently from an ordinary one
When you are prescribed a licensed medicine, somebody has already done this work for you. The manufacturer had to submit evidence to a regulator, and the regulator required a Summary of Product Characteristics setting out who must not receive the drug and under what circumstances. That document is enforceable, it is updated when new signals appear, and a prescriber who ignores it is answerable.
No exosome preparation used for aesthetic or hair indications in the UK holds that authorisation. So no such document exists. There is no approved contraindication list, because no regulator has ever required anyone to produce one.
That is not a technicality to work around. It is the most important fact on this page. Everything below is reasoning by analogy from procedures that have been studied, chiefly microneedling and injectable aesthetics generally. It is what a careful practitioner would apply. It is not what a regulator has approved, and nobody should present it to you as though it were.
The groups where a careful clinic declines
Pregnancy and breastfeeding
Decline. The absence of study data is the reason, not the presence of demonstrated harm. An elective cosmetic procedure is trivially easy to postpone by a few months, and the calculation is not close. A clinic willing to treat during pregnancy has told you something about how it weighs an unknown against a booking.
Active infection or inflammation in the treatment area
Delay. The delivery route is usually microneedling, which means passing a needle through the skin repeatedly. Doing that through active acne, an eczema flare, a cold sore, or any infected area spreads the problem into the tissue underneath. This is a wait, not a permanent exclusion, and any practitioner who does not raise it has not looked at your skin properly.
Immunosuppression and active autoimmune disease
Raise it with the doctor managing that condition first. The preparations are sold on the basis of a biological signalling effect on your tissue. Whether that effect is real is disputed. What is not disputed is that a person whose immune function is already being actively managed is the wrong person to accept an unquantified biological input in exchange for a cosmetic outcome.
Hair loss without a diagnosis
This one is different from the others, because it is not about physical risk. Hair loss has causes: thyroid disease, iron deficiency, a drug you are taking, a scarring alopecia that will not respond to anything applied to the surface. A course of scalp treatment sold before anyone has established which of these applies is not dangerous so much as it is a delay to the thing that would have worked, paid for at several hundred pounds a session. Ask what the diagnosis is. If there is no answer, there is no diagnosis.
Keloid and hypertrophic scarring history
Tell them. Repeated needle penetration in someone who scars abnormally is a known consideration for microneedling in general, entirely independently of what is applied afterwards.
Under 18s
No. No evidence base in this group, no licensing, and no cosmetic indication in a face that is still changing shape.
The disclosure that matters more than any condition
If you have ever had an unexpected reaction to an injected or topically applied cosmetic product, a filler, a peel, a mesotherapy preparation, say so in plain terms before anything is booked. People routinely leave this out, usually from embarrassment about having had the earlier treatment at all. It is the single most useful thing a practitioner can know about you, and it changes what a careful one will agree to do.
Two questions that reveal the clinic rather than the treatment
Ask what is in the vial, by name, and where it was sourced. Ask who decided you were suitable and on what basis. Neither question is aggressive and both have straightforward answers in a clinic that has them.
A practitioner who cannot say what the preparation is, or who has not asked you a single screening question before taking a deposit, has not made a clinical decision about you. They have taken a booking. That is the finding, and it applies whatever the product turns out to be.
What this page does not cover
It does not tell you whether the treatment works, which is the evidence page. It does not set out the regulatory position, which is risks and regulation. And it is not a substitute for a consultation with someone who can examine you. It is the list of things worth knowing before you book one, written by people with no appointment to sell you.
Common questions
Is there an official contraindication list for exosome therapy in the UK
No. A licensed medicine carries a Summary of Product Characteristics, which states who must not receive it, and that document exists because a regulator required it. No exosome preparation used for aesthetic or hair indications in the UK holds that authorisation, so no such document exists. Any list you are shown, including this one, is reasoning by analogy from adjacent procedures rather than a regulator approved instruction.
Can I have it while pregnant or breastfeeding
A careful clinic will decline. Not because harm has been demonstrated, but because it has not been studied, and an elective cosmetic treatment is the easiest thing in the world to postpone. A clinic willing to treat you in pregnancy has told you how it weighs unknown risk against a booking.
What about an autoimmune condition or immunosuppression
Discuss it with the doctor treating that condition before you discuss it with a clinic. The preparations are marketed on the basis of a biological signalling effect, and a person whose immune function is already being managed is the last person who should accept an unquantified one.
Does active acne or eczema rule it out
In the treatment area, yes, until it settles. Microneedling is the usual delivery route, and passing a needle repeatedly through inflamed or infected skin spreads the problem. This is a delay, not a permanent exclusion.
I have had a bad reaction to a filler or a peel before
Say so, in those words, before anything is booked. A history of unexpected reaction to an injected or applied product is the single most useful thing you can tell a practitioner, and it is the thing people most often leave out because they are embarrassed by it.
Should under 18s have it
No. There is no evidence base in this group, no licensing, and no cosmetic indication in a person whose face is still changing. Any clinic offering it should be reported to its regulator if it has one.
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