Platelet-Rich Plasma for Hair Loss: Anitua 2025 Research Summary
This is a plain-language summary of the original published research. We do not add conclusions or opinions of our own. This is not medical advice — consult a certified healthcare practitioner before making any decision.
Original research published in Dermatology and Therapy, 2025
Platelet-Rich Plasma for Hair Loss: Anitua 2025 Research Summary
Study conclusion
This study combined results from 43 randomised controlled trials involving 1,877 patients treated with platelet-rich plasma (PRP) for various types of hair loss. Activated PRP significantly increased hair density and minimised recurrence compared to placebo. Non-activated PRP was associated with higher rates of adverse effects.
Strength of evidence
Who it applies to
Who was studied
Adults with pattern hair loss and other types of alopecia. 1,877 participants across 43 randomised controlled trials. Various PRP preparation protocols, injection frequencies, and treatment schedules.
Who was NOT studied
There is no standardised PRP protocol — the composition of PRP varies between providers and preparation methods. Results from one clinic may not match another.
What to look for when shopping
PRP is a clinic-based procedure. There is no consumer product. It involves drawing blood, centrifuging it to concentrate platelets, and injecting the resulting plasma into the scalp. PRP is not FDA-approved for hair loss.
What research cannot help you decide
Which PRP preparation method, platelet concentration, or injection schedule will produce the best results for you. Whether PRP will work for your specific hair loss pattern or severity.
Key findings
- Activated PRP significantly increased hair density compared to placebo across the included trials
- Activated PRP was associated with less recurrence of hair loss compared to placebo
- Non-activated PRP was associated with higher rates of adverse effects than activated PRP
- PRP is not FDA-approved for hair loss — it is used off-label
- High variability across the 43 trials in how PRP was prepared and administered limits confidence in the pooled result
What this study does not show
- 1.Which PRP preparation method, platelet concentration, or activation technique is optimal. Protocols varied widely across the 43 trials.
- 2.Whether PRP works better or worse than minoxidil in a head-to-head comparison — a separate review found no significant difference.
- 3.How long PRP results last. Recurrence patterns varied across studies.
- 4.Whether PRP works for alopecia areata as reliably as for pattern hair loss.
Limitations
- 1.Industry-funded — the primary funder (BTI Biotechnology Institute) manufactures PRP preparation equipment. This introduces potential for positive result bias.
- 2.High heterogeneity across the 43 trials due to different PRP preparation protocols, platelet concentrations, and injection schedules.
- 3.PRP is not FDA-approved for hair loss.
- 4.No standardised PRP protocol exists — results from this review cannot be reliably applied to any specific clinic.
- 5.Clinic-only procedure — no consumer product exists.
Used in these articles
Links added as fact-checks and articles citing this study are published.