Exosomes: what they are, and whether the excitement is justified

Every few years a treatment arrives with enough genuine science behind it to be interesting and enough marketing around it to be exhausting. Exosomes are currently that treatment.

The underlying biology is real and quite elegant. The clinical evidence is early. Both of those things can be true, and a clinic that only tells you the first half is not being straight with you.

What an exosome is

Cells communicate. One of the ways they do it is by packaging signalling molecules — growth factors, proteins, messenger RNA — inside tiny membrane-bound vesicles and releasing them. Neighbouring cells absorb these vesicles and respond to the instructions inside. Those vesicles are exosomes.

The therapeutic idea is straightforward: if you can deliver a concentrated, standardised dose of the right signalling vesicles into skin or scalp, you can prompt repair behaviour without adding any cells or foreign structural material.

How this differs from PRP

The practical distinction people care about: PRP quality depends on you. If your platelet count is low, or you are unwell, or you are dehydrated on the day, your PRP is weaker. Exosome product arrives at the same concentration every time.

Against that, PRP has the longer track record and is the treatment with the more established evidence — particularly for hair restoration.

How the treatment is delivered

For the face, exosomes are almost always paired with microneedling. That combination is deliberate rather than an upsell: microneedling creates thousands of controlled micro-channels, and those channels are what allow a large molecule to reach the depth where it can do something. Applied to intact skin, most of it does not get in.

1. Numbing cream, left on for around twenty minutes.
2. Microneedling across the treatment area at a depth chosen for your skin and concern.
3. Exosome solution applied and worked into the freshly created channels.
4. A calming, occlusive layer to finish.

Expect to look meaningfully red for 24 hours, pink for another day, and slightly dry or tight for two to three days. This is real downtime, unlike a facial — plan around it.

For the scalp, delivery is by injection in a grid pattern, similar to PRP, with less downtime — some tenderness for a day.

What the evidence currently supports

Honest position: the laboratory science is strong, the early clinical reports are encouraging, and the large, long-term, independent human trials are not yet there in the way they are for better-established treatments.

What that means for a decision:

• Reasonable to try if you have plateaued on established treatments, or want to add something to a plan that is already working.
• Reasonable to skip if you have not yet tried the well-evidenced options. There is no advantage in starting with the newest thing.
• Not a substitute for the fundamentals — sun protection, retinoid use where appropriate, and treating any underlying medical cause of hair loss.

Sessions and timeline

Both face and hair protocols are three sessions, two to four weeks apart. For skin, the improvement in texture builds over six to twelve weeks after the final session as collagen remodels. For hair, apply the same patience as PRP — three months minimum before judging.

Maintenance is typically one session every four to six months.

Aftercare for the face treatment

• Nothing on the skin for the rest of the day except what your practitioner provides.
• No makeup for 24 hours. This one matters — the channels are open.
• No exercise, sauna, steam or swimming for 48 hours.
• No actives — retinoids, acids, vitamin C — for five days.
• Rigorous SPF for two weeks. Freshly microneedled skin burns easily and pigments readily.

The honest summary

Exosome therapy is a genuinely interesting treatment with sound underlying science, delivered in a way that makes sense, at a price that is not unreasonable relative to the alternatives. It is also newer than the marketing around it implies.

We offer it, we think it is worth offering, and we will suggest PRP first for most people asking about hair. That is not a lack of confidence — it is the order the evidence supports.