PRP (Platelet-Rich Plasma)
Does it work for androgenetic alopecia?
Last reviewed (demo): 2025-11-10
Verdict
Likely works
Evidence
B
Strong
Effectiveness
66/100
Why this score?
Measured outcomes show increased hair density and shaft calibre versus control; visible cosmetic benefit is less consistent.
Safety
88/100
Why this score?
Autologous blood products have a good safety record; risks are mostly local (pain, swelling, infection) and transient.
User Score
6.9/10
Prototype sentiment
Confidence
Moderate
Prototype confidence
Good evidence suggests this treatment works for most people. All scores on this page are prototype placeholders — not validated ProofCritic ratings and not calculated from the study index below.
Quick facts
- Treatment type
- Procedure
- Prescription
- No
- Time to results
- 3–6 months
- Typical usage
- Increasing hair density in early-to-moderate pattern loss
- Maintenance
- Repeat sessions every 3–12 months
- Typical cost
- €€€€
The Evidence at a Glance
Calculated from publications ProofCritic has indexed from scientific databases (PubMed / Europe PMC). Metrics ProofCritic cannot yet calculate reliably are shown as “Not yet calculated” — never estimated.
“Research indexed by ProofCritic” means real publication metadata has been stored — it has not yet been human-verified and does not influence the prototype rating above. How verification works →
Science vs Real World
Science
- Clinical outcomes measured in studies
- Study populations & their limitations
- Adverse events recorded by researchers
- Publication & verification status per source
PRP (Platelet-Rich Plasma)'s scientific rating is based on indexed publications — see The Evidence at a Glance.
Real World
ProofCritic user data is not yet available.
First-party user reports are collected on this page and stored for moderation.
They are never mixed into the scientific evidence.
Aggregates appear here only once real, moderated submissions exist.
Have experience with PRP (Platelet-Rich Plasma)? Share your report →
The Bottom Line
PRP shows real but variable benefit. It may improve density, but cost, inconsistent protocols and temporary results make it a secondary option rather than a first-line treatment.
Benefits & drawbacks
Potential benefits
- Uses the patient’s own blood — minimal allergy risk
- Multiple meta-analyses report increased hair density
- Can be combined with other treatments
Potential drawbacks
- Expensive per session, usually not reimbursed
- Protocols (spin method, session count, depth) vary wildly between clinics
- Discomfort during injections
- Results are temporary without maintenance sessions
More detail
Why ProofCritic rates it this way — evidence breakdown
- Quantity of evidence: Many trials and several meta-analyses, mostly small-to-moderate size.
- Study quality: Mixed quality; most trials small with heterogeneous protocols.
- Consistency: Direction of effect favours PRP, but effect size varies widely.
- Relevance: Directly studies androgenetic alopecia.
- Duration: Most trials 3–6 months; maintenance data limited.
- Limitations: Protocol heterogeneity, small samples, operator dependence, few blinded designs.
Real-world experience (prototype): Satisfaction tracks closely with clinic choice and price tolerance; users with realistic density-focused expectations report better experiences.
How it works — mechanism
Concentrated platelets release growth factors when injected into the scalp, theoretically stimulating follicle activity and prolonging the growth phase.
Who it may suit / who should be cautious
Who it may suit: People with early-to-moderate pattern loss who want a drug-free procedural option and can absorb the cost.
Who should be cautious: People with blood disorders, platelet dysfunction, or active scalp infection.
Side effects to know about
- Temporary swelling, tenderness and redness
- Small risk of infection at injection sites
- Mild headache in some patients
Not a complete list. Speak to a pharmacist or doctor for guidance specific to you.
Your experience
Have you tried this treatment? Share your experience
Products
ProofCritic evaluates the intervention separately from products containing it.
No products are currently listed for this treatment.
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