PRF (Platelet-Rich Fibrin) is the second-generation evolution of PRP therapy for hair loss, offering higher growth factor concentrations and a sustained release mechanism that PRP cannot match. Both treatments use your own blood to stimulate dormant hair follicles, but they differ significantly in preparation, delivery, and emerging clinical evidence.
This article is for informational purposes only and does not constitute medical advice.
Quick Comparison
| Feature | PRP | PRF |
|---|---|---|
| Generation | First-generation | Second-generation |
| Anticoagulant used | Yes (heparin or sodium citrate) | No (additive-free) |
| Spin speed | High (above 2,000 RPM) | Low (below 700 RPM) |
| Growth factor release | Rapid burst (hours) | Sustained release (10-14 days) |
| White blood cells | Varies by preparation | Higher concentration |
| Fibrin matrix | No | Yes (natural scaffold) |
| Cost per session (US) | $400-1,200 | $500-1,500 |
| Sessions needed | 3-4 initial | 3-4 initial |
| FDA approval | Not FDA-approved for hair | Not FDA-approved for hair |
| Evidence base | Moderate (20+ hair-specific studies) | Limited but growing (fewer studies) |
What Is PRP?
Platelet-Rich Plasma (PRP) has been used in hair restoration since the early 2010s. A small volume of your blood (typically 20-60ml) is drawn, mixed with an anticoagulant, and spun in a centrifuge at high speed. This separates the blood into layers: red blood cells at the bottom, a buffy coat (platelet-rich layer) in the middle, and platelet-poor plasma on top.
The platelet-rich layer is extracted and injected into the scalp at thinning areas. Platelets contain growth factors including PDGF, VEGF, TGF-beta, and EGF, which stimulate follicular stem cells, promote angiogenesis (new blood vessel formation), and extend the anagen growth phase.
How PRP Is Prepared
- Blood is drawn from the patient's arm (20-60ml)
- An anticoagulant is added to prevent clotting during processing
- Blood is centrifuged at high RPM (typically 2,000-3,500 RPM)
- The platelet-rich layer is isolated using a syringe
- The concentrated PRP is injected into the scalp using a fine needle or microneedling device
The anticoagulant is what separates PRP from PRF. It keeps the blood from clotting, allowing easy processing, but it also dilutes the final product and prevents the formation of a fibrin matrix.
PRP Evidence for Hair Loss
PRP has the larger evidence base. A 2019 systematic review and meta-analysis of 11 randomized controlled trials found that PRP significantly improved hair density and thickness compared to placebo. Multiple studies show that PRP increases hair count by 20-30% in responders.
However, outcomes vary widely because there is no standardized PRP preparation protocol. Different clinics use different centrifuge speeds, volumes, and platelet concentrations, making it difficult to compare results across providers.
What Is PRF?
Platelet-Rich Fibrin (PRF) was developed by Dr. Joseph Choukroun initially for dental and oral surgery applications. It uses the same concept as PRP but eliminates the anticoagulant. This single change produces a fundamentally different product.
Without an anticoagulant, the blood begins to clot naturally during the low-speed centrifugation process. This creates a fibrin matrix, a natural biological scaffold that traps platelets, white blood cells, and growth factors within its structure.
How PRF Is Prepared
- Blood is drawn from the patient's arm (similar volume to PRP)
- No anticoagulant is added
- Blood is centrifuged at low RPM (200-700 RPM) for a shorter duration
- The resulting fibrin clot and liquid layer are collected
- Injectable PRF (i-PRF) is drawn from the liquid fraction before full clotting
- The i-PRF is injected into the scalp
The low-speed centrifugation is critical. Spinning slower preserves more white blood cells and stem cells that would be destroyed or separated out at higher speeds. The resulting product contains approximately 10x more white blood cells than PRP and a more complete growth factor profile.
The Sustained Release Advantage
The fibrin matrix in PRF acts as a slow-release delivery system. Growth factors are embedded within the fibrin scaffold and released gradually over 10-14 days as the matrix naturally dissolves. PRP, by contrast, delivers its growth factors in a rapid burst that dissipates within hours.
This sustained release means hair follicles are exposed to growth-promoting signals for a significantly longer period after each treatment session. In theory, this longer exposure window should produce a stronger biological response.
PRF Evidence for Hair Loss
The evidence base for PRF in hair restoration is smaller than PRP's but growing. Early studies show encouraging results:
- A 2020 study comparing PRF to PRP for androgenetic alopecia found that PRF produced greater improvements in hair density at 6 months
- Multiple case series report patient satisfaction rates above 80% with PRF treatment protocols
- The higher leukocyte (white blood cell) content in PRF may provide anti-inflammatory benefits that address scalp microinflammation, a contributing factor in androgenetic alopecia
However, large-scale randomized controlled trials specifically comparing PRF to PRP for hair loss are still limited. Much of the enthusiasm for PRF comes from its biological rationale and extrapolation from its proven success in wound healing and dental applications.
Treatment Protocol Comparison
Both PRP and PRF follow similar treatment schedules, but the details differ.
PRP Treatment Protocol
- Initial phase: 3-4 sessions, spaced 4-6 weeks apart
- Maintenance: 1 session every 4-6 months
- Session duration: 30-60 minutes (including blood draw and preparation)
- Injection technique: Multiple small injections across thinning areas, approximately 1cm apart
- Activation: Some providers "activate" PRP with calcium chloride or thrombin before injection
PRF Treatment Protocol
- Initial phase: 3-4 sessions, spaced 4-6 weeks apart
- Maintenance: 1 session every 6-12 months (longer intervals due to sustained release)
- Session duration: 30-60 minutes
- Injection technique: Similar to PRP, with injections into the dermal papilla zone
- Activation: No activation needed (the fibrin matrix forms naturally)
PRF's sustained release mechanism may allow for less frequent maintenance sessions, potentially reducing the long-term cost despite the higher per-session price.
Cost Breakdown
| Cost Factor | PRP | PRF |
|---|---|---|
| Per session (US) | $400-1,200 | $500-1,500 |
| Initial phase (3-4 sessions) | $1,200-4,800 | $1,500-6,000 |
| Annual maintenance | 2-3 sessions ($800-3,600) | 1-2 sessions ($500-3,000) |
| First year total | $2,000-8,400 | $2,000-9,000 |
| Year 2+ annual cost | $800-3,600 | $500-3,000 |
PRF costs more per session but may cost less per year in maintenance because of less frequent treatments. The total expense over multiple years can be comparable.
Neither PRP nor PRF is covered by insurance for hair loss treatment. Some clinics offer package pricing that reduces the per-session cost by 10-20%.
Who Responds Best
Not every patient will see significant results from either treatment. The best candidates share common characteristics.
Strong Candidates
- Early to moderate hair loss (Norwood 2-4)
- Recent onset of thinning (within the last 1-5 years)
- Miniaturized but still-living follicles (not fully bald areas)
- Patients already on finasteride or minoxidil who want to enhance results
- Post-hair transplant patients looking to boost graft survival and native hair health
Weaker Candidates
- Advanced hair loss (Norwood 6-7) with fully bald, smooth scalp areas
- Long-standing baldness where follicles have been dormant for many years
- Patients expecting PRP or PRF to replace surgical hair transplantation
- Those with autoimmune hair loss (different mechanism, unpredictable response)
Combining with Other Treatments
Both PRP and PRF work best as part of a multi-therapy approach rather than as standalone treatments.
Common Combinations
- PRP/PRF + Finasteride + Minoxidil: The most effective non-surgical stack. Medication addresses the hormonal cause while platelet therapy stimulates follicle activity directly.
- PRP/PRF + Microneedling: Microneedling creates micro-channels that improve absorption and trigger additional wound-healing growth factor release.
- PRP/PRF + Post-Transplant: Many surgeons inject PRP or PRF at the time of hair transplant surgery to improve graft survival and accelerate healing. Studies suggest a 10-15% improvement in early graft survival rates.
Which Should You Choose?
If your clinic offers both options, PRF has the stronger biological rationale. The sustained release mechanism, higher white blood cell content, and absence of anticoagulants represent genuine improvements over first-generation PRP.
However, PRP has the deeper evidence base, wider availability, and a longer track record. If your provider has extensive experience with PRP and a proven protocol, switching to PRF solely based on theory may not produce noticeably different results for your specific case.
The most important factor is not which platelet therapy you choose but whether your provider uses a consistent, high-quality preparation protocol. A well-prepared PRP can outperform a poorly prepared PRF.
Next Steps
Both PRP and PRF are supplementary treatments that work best alongside proven medical therapy. Before investing in platelet therapy, establish a baseline understanding of your hair loss stage and pattern.
Upload a photo at myhairline.ai/analyze to assess your current Norwood stage and get personalized treatment recommendations that may include PRP, PRF, or other options matched to your specific pattern.