Clinical Comparison · Hair Restoration
Hair Exosomes vs i-PRF: Which is better for hair loss?
A clinical comparison of the two leading regenerative hair restoration treatments at our clinic — i-PRF (the next-generation form of PRP) and hair exosomes — covering how each one works, what the research shows, and when one is worth the higher investment over the other.
Hair Exosomes vs i-PRF at a glance
The clinical comparison, side by side.
| i-PRF | Hair Exosomes | |
|---|---|---|
| Source | Patient's own blood (autologous) | Mesenchymal stem cells — donor-derived, lab-purified |
| What's delivered | Fibrin matrix + platelets, leukocytes, stem cells | Nano-vesicles carrying mRNA, microRNA, proteins, growth factors |
| Concentration | Higher than standard PRP — slower release over days | Up to 10¹⁰ vesicles per ml — far higher signal density |
| Anticoagulants used | None — pure spin protocol | N/A — lab-isolated extracellular vesicles |
| Mechanism | Slow-release growth factor delivery to follicle stem cells | Cell-to-cell signalling; reactivates dormant follicles |
| Sessions needed | 3 monthly, then maintenance | 2–3 monthly, then maintenance |
| Visible results | 2–3 months | 1–2 months (often faster) |
| Maintenance | Every 4–6 months | Every 6–12 months |
| Evidence base | Built on 15+ years of PRP literature, plus i-PRF advances | Emerging — 2025 systematic review of 11 clinical studies |
| Typical UK cost | From £350 per session | From £700 per session |
| Best for | Early-stage AGA, naturally-led patients | Advanced AGA, slow i-PRF responders, faster results |
What is i-PRF?
i-PRF stands for injectable platelet-rich fibrin. It is the second-generation evolution of PRP, developed to overcome the practical limitations of earlier blood-derived therapies. The differentiating feature is simple but mechanistically significant: i-PRF is prepared without anticoagulants.1
In standard PRP, anticoagulants are added to the blood sample to prevent clotting during centrifugation. The result is a liquid plasma that releases growth factors quickly — within hours of injection. i-PRF skips the anticoagulant step. The blood is spun at a lower speed, allowing fibrin to begin forming. This produces a fibrin-rich matrix that traps platelets, growth factors, leukocytes and stem cells, releasing them gradually over 7–10 days rather than hours.12
Clinically, this means a longer-acting regenerative effect from each injection. The fibrin scaffold also serves as a mild physical signal in itself — supporting tissue regeneration around hair follicles in a way that liquid PRP cannot.
At GlowMedix Clinic, i-PRF has replaced standard PRP as our default blood-derived hair restoration protocol. For a deeper comparison of the two, see our PRP vs i-PRF page.
What are hair exosomes?
Exosomes are tiny extracellular vesicles — about 30–150 nanometres in diameter — released by cells to communicate with each other. They carry proteins, lipids, mRNA and microRNA, effectively acting as biological "messages" between cells.3
For hair restoration, exosomes are derived from mesenchymal stem cells (MSCs) — typically from human umbilical cord, foreskin, or bone marrow sources — purified, characterised, and prepared for clinical use. When injected into the scalp, they signal hair follicle stem cells to enter the anagen (active growth) phase, prolong the growth cycle, and stimulate dermal papilla cell activity.
The key clinical advantage is signal concentration. Where i-PRF delivers a slow-release scaffold of your own growth factors at biological levels, exosomes can deliver up to 10¹⁰ regenerative vesicles per millilitre — orders of magnitude higher than what platelets alone can provide.4
A 2025 systematic review analysing 11 clinical studies (including two randomised controlled trials, three retrospective studies, three prospective single-arm studies) concluded that exosome therapy demonstrates effectiveness for androgenetic alopecia and other forms of hair loss, with a favourable safety profile.3 A 30-patient prospective study using foreskin-derived MSC exosomes in male AGA showed measurable increases in hair density across treatment cycles.4
Why patients ask about both
i-PRF and exosomes are the two regenerative options most patients are choosing between when they decide to take hair loss seriously. Both deliver biological signals to the follicle — but they sit at very different points on the cost / potency / evidence-maturity spectrum. i-PRF is the well-established, autologous option built on 15+ years of PRP literature and refined by modern protocols. Exosomes are the newer, more potent option backed by rapidly-growing clinical evidence.
The right choice usually depends on three things: how advanced the hair loss is, how quickly results are needed, and budget. For many of our patients, the answer is i-PRF first — and then layering exosomes if the response needs amplifying. The decision matrix below sets out the most common scenarios.
The Five Key Differences
Where i-PRF and exosomes actually differ
Boiled down to the five differences that matter clinically.
Biological source
i-PRF is autologous — drawn and prepared from your own blood. Exosomes are derived from mesenchymal stem cells in a regulated lab process. Both are biologically active; the exosome route allows higher signal concentration than blood plasma can naturally contain.
Signal concentration
Per millilitre injected, exosomes deliver dramatically more regenerative signals than i-PRF. i-PRF gives a slow-release scaffold at natural biological levels. Exosomes deliver up to 10¹⁰ signalling vesicles per ml. This is the single biggest mechanistic difference between the two.
Sessions and protocol
i-PRF typically requires 3 sessions a month apart, with maintenance every 4–6 months. Exosomes typically require 2–3 sessions and maintenance every 6–12 months. Fewer visits is a meaningful practical advantage for many patients.
Evidence maturity
i-PRF builds on 15+ years of peer-reviewed PRP research, with newer literature specifically validating the i-PRF preparation. Exosomes have a smaller but rapidly-growing body of clinical research — including a 2025 systematic review of 11 clinical studies showing efficacy and safety for AGA. Both are evidence-based, just at different maturity stages.
Cost profile
Exosomes cost roughly 2× per session compared to i-PRF, reflecting the more advanced production. Because exosomes typically need fewer sessions, total course cost is closer than the per-session number suggests — but exosomes remain the more premium option.
i-PRF works with your biology. Exosomes amplify it.
Choosing Between Them
Which one is right for you?
A starting framework — final treatment plans are decided in clinical consultation with Dr Hassan or Rabia.
Dr Syed H Hassan
Dr Hassan is an experienced Private GP with a special interest in regenerative and aesthetic medicine. As Medical Director of GlowMedix Clinic, he oversees every treatment plan across all three London locations and ensures the highest clinical-safety standards are maintained — particularly in regenerative therapies like exosomes and i-PRF, where patient assessment and protocol selection drive outcomes.
"The best result is when someone says 'you look well' — not 'what have you had done.' That is always the goal." Read more about the team.
Frequently Asked Questions
Common questions about i-PRF and exosomes
i-PRF (injectable platelet-rich fibrin) is the second-generation form of PRP — your own blood spun without anticoagulants, producing a fibrin-rich matrix that releases growth factors slowly over days. Hair exosomes are nano-vesicles derived from mesenchymal stem cells, delivering a far higher concentration of regenerative signals than blood-derived treatments can naturally contain. i-PRF works with your own biology; exosomes amplify regenerative signalling beyond what the body can produce on its own.
Yes — i-PRF is widely considered the next generation of PRP. It is prepared without the anticoagulants used in standard PRP, allowing fibrin to form a slow-release matrix that delivers growth factors over days rather than hours. It also retains higher concentrations of stem cells and white blood cells. At GlowMedix, i-PRF is our standard blood-derived hair restoration protocol. Read the full PRP vs i-PRF comparison.
For early-stage hair loss, i-PRF is highly effective and often sufficient. For more advanced thinning, slow responders to blood-derived treatments, or patients seeking faster visible results, exosomes typically deliver stronger outcomes. A 2025 systematic review of 11 clinical studies found exosome therapy effective and well-tolerated for androgenetic alopecia.3
i-PRF typically requires 3 sessions monthly, then maintenance every 4–6 months. Hair exosomes typically require 2–3 sessions monthly with maintenance every 6–12 months. Exosomes generally need fewer sessions because of the higher concentration of regenerative signals delivered per treatment.
Hair exosomes are more expensive per session than i-PRF, reflecting the more advanced production process. At GlowMedix Clinic, i-PRF starts from £350 per session and Hair Exosomes from £700 per session. Because exosomes typically need fewer sessions, the total course investment is closer than the per-session difference suggests.
Clinical studies to date report exosomes are well-tolerated with no serious adverse events. A 2025 systematic review of clinical studies found exosome therapy to have a favourable safety profile.3 Side effects are typically mild and limited to short-term tenderness or redness at injection sites.
Yes — combination protocols are increasingly common at our clinic. We sometimes layer i-PRF and exosomes in the same session or alternate them across treatment cycles. The combination is well-tolerated and can produce additive results, particularly in patients with more advanced hair loss.
Both treatments require maintenance to sustain results. i-PRF results typically last 4–6 months between maintenance sessions. Exosome results can last 6–12 months between maintenance sessions, partly due to the higher concentration of growth signals delivered per session and the longer reactivation cycle they trigger in dormant follicles.
References
Clinical references
- Choukroun J, Ghanaati S. Reduction of relative centrifugation force within injectable platelet-rich-fibrin (PRF) concentrates advances patients' own inflammatory cells, platelets and growth factors. Eur J Trauma Emerg Surg. 2018;44(1):87-95. PMC5808086
- Fujioka-Kobayashi M, Miron RJ, Hernandez M, et al. Optimized Platelet-Rich Fibrin With the Low-Speed Concept: Growth Factor Release, Biocompatibility, and Cellular Response. J Periodontol. 2017;88(1):112-121. PMID 27786620
- Yew YW, Tey HL, et al. Exosomes and Hair Regeneration: A Systematic Review of Clinical Evidence Across Alopecia Types and Exosome Sources. 2025. PMC12433634
- Yeditepe University Hospital research team. Effectiveness of Exosome Treatment in Androgenetic Alopecia: Outcomes of a Prospective Study. 2024. PMC11588828
- Cervantes J, Perper M, Wong L, et al. Effectiveness of Platelet-Rich Plasma for Androgenetic Alopecia: A Review of the Literature. Skin Appendage Disord. 2018;4(1):1-11. PMC11247247
- Mishra S, Sankhwar S, et al. The use of platelet-rich plasma (PRP) in androgenetic alopecia: a systematic review. 2021. PMC8664169