Platelet-rich plasma therapy has moved from orthopaedic surgery to one of the most commonly offered non-surgical hair restoration treatments worldwide. Almost every hair transplant clinic now offers it, frequently as part of a package. The marketing surrounding PRP regularly outpaces the evidence. This guide presents what the clinical research actually shows, who genuinely benefits, and how to assess PRP as part of a broader hair restoration plan.
What PRP Is and How It Works
Platelet-rich plasma is derived from the patient’s own blood. The procedure involves three steps:
1. Blood draw. A standard venepuncture draws 20 to 60 ml of whole blood, depending on the specific protocol.
2. Centrifugation. The blood is placed in a centrifuge and spun at controlled speeds that separate it into layers: red blood cells at the bottom, platelet-poor plasma at the top, and the concentrated platelet fraction (the “buffy coat”) in the middle. This middle layer is the PRP.
3. Scalp injection. The PRP fraction is injected into the scalp at the thinning or treated area using a fine needle, typically in a grid pattern at intervals of approximately 1 cm. The procedure takes 20 to 45 minutes and causes mild discomfort similar to scalp acupuncture.
The Mechanism
Platelets contain alpha granules packed with growth factors: platelet-derived growth factor (PDGF), vascular endothelial growth factor (VEGF), insulin-like growth factor (IGF-1), and transforming growth factor (TGF-beta), among others. Injected at concentrations well above baseline, these growth factors act on hair follicles and surrounding vasculature.
The proposed mechanisms include:
- Prolonging the anagen (growth) phase of the hair cycle
- Stimulating blood vessel formation around follicles, improving nutrient delivery
- Activating follicle progenitor cells that may partially reverse miniaturisation – the process by which DHT-sensitive follicles gradually produce thinner, shorter hairs before becoming dormant
What the Clinical Evidence Shows
For androgenetic alopecia (pattern hair loss): Multiple RCTs have demonstrated statistically significant improvements in hair density, hair shaft diameter, and hair count at 3, 6, and 12 months versus placebo. Meta-analyses confirm a measurable effect. Typical studies show a 20 to 35 percent increase in terminal hair count per cm2 at 6 months compared to baseline.
For alopecia areata: PRP shows encouraging results in patch alopecia areata, with several studies reporting regrowth in patches where conventional treatments had failed. Evidence is weaker for extensive or universal alopecia areata.
For telogen effluvium: PRP may help resolve persistent diffuse shedding triggered by stress, illness, or hormonal change. Evidence is limited but directionally positive.
What the evidence does not show: PRP does not regrow hair where follicles are permanently absent. Completely smooth, atrophic scalp areas with no miniaturised follicles show no response. PRP also does not permanently stop the progression of androgenetic alopecia: the underlying genetic and hormonal process continues, and without maintenance, hair loss resumes.
Who PRP Works Best For
Patient selection is the most important determinant of PRP outcomes.
Ideal candidates:
- Early to moderate androgenetic alopecia (Norwood 1 to 4 in men, Ludwig 1 to 2 in women) with still-present but miniaturised follicles
- Women with diffuse thinning who are not surgical candidates because the donor area is also thinning
- Patients wanting to preserve existing hair before or after transplant surgery
- Patients with alopecia areata not responding well to topical treatments
- Post-transplant patients seeking to support graft survival and early growth
Poor candidates:
- Patients with advanced hair loss and large areas of complete follicle absence
- Patients with active scalp inflammation, psoriasis, or significant scarring alopecia in the treatment area
- Patients with blood disorders, platelet dysfunction, or anticoagulant medications
- Patients expecting complete restoration of a significantly bald scalp
A practitioner who offers PRP to every patient without assessing whether miniaturised follicles are still present is not operating from evidence-based criteria.
PRP Session Protocol: What to Expect
Session 1: Baseline scalp assessment, standardised photographs (consistent angle and lighting for comparison), trichoscopy if available. First injection series.
Sessions 2 to 3: Follow-up injections at 4 to 6 week intervals.
6-month reassessment: Repeat standardised photographs and trichoscopy. Compare against baseline. Determine maintenance interval (typically every 6 to 12 months).
Planning note for dental tourism: PRP alone rarely justifies international travel. At $200 to $500 per session in Turkey or India, a 3-session course costs $600 to $1,500 versus $1,200 to $4,500 in the US. The saving is meaningful but not enough to warrant a dedicated trip. The most economical approach is combining PRP with a hair transplant procedure in a single trip: intraoperative PRP during the transplant, and one or two post-operative sessions before returning home.
PRP Costs by Country
PRP Hair Treatment Cost by Country (Per Session, USD)
Prices as of May 2026. Source: direct clinic inquiry across major medical tourism destinations. Figures reflect standalone PRP session pricing at hair restoration clinics. Sessions combined with transplant surgery may be priced differently or included.
| Country | Per Session | 3-Session Course | vs US Savings |
|---|---|---|---|
| USA | $400 -- $1,500 | $1,200 -- $4,500 | -- |
| UK | $300 -- $1,000 | $900 -- $3,000 | -- |
| Australia | $350 -- $1,200 | $1,050 -- $3,600 | -- |
| Turkey | $200 -- $500 | $600 -- $1,500 | 60 -- 75% |
| India | $150 -- $400 | $450 -- $1,200 | 65 -- 80% |
| Thailand | $200 -- $450 | $600 -- $1,350 | 60 -- 75% |
| Mexico | $200 -- $500 | $600 -- $1,500 | 60 -- 75% |
| Hungary | $200 -- $400 | $600 -- $1,200 | 65 -- 80% |
PRP Combined with Hair Transplant Surgery
The most clinically relevant use case for PRP in a transplant context is as an intraoperative graft storage medium and scalp preparation protocol.
Graft storage in PRP solution: Extracted follicular units are stored in PRP-enriched solution rather than saline before implantation. Published studies suggest this reduces graft dehydration and may improve survival rates, particularly in large sessions where bench time exceeds 3 to 4 hours.
Intraoperative scalp injection: PRP is injected into the recipient area before or after graft implantation to improve vascularisation in the receiving tissue. Evidence is mixed but directionally positive for early hair emergence.
Post-transplant sessions: PRP at 1, 3, and 6 months post-transplant is offered by many clinics as adjunctive therapy to support early graft growth and reduce telogen phase duration. Evidence is limited but carries low risk.
Ask your transplant clinic specifically:
- How is PRP prepared? (What kit system, what centrifuge protocol?)
- Is it used intraoperatively for graft storage, for scalp injection, or both?
- Are post-operative sessions included or separately priced?
A clinic that includes “free PRP” without specifying the protocol may be offering low-platelet-concentration PRP with minimal therapeutic value.
What to Verify Before Booking PRP Treatment
1. Platelet concentration methodology. The therapeutic threshold is typically 4 to 5 times baseline platelet concentration. Some systems achieve this reliably; others produce concentrations closer to 2 to 3 times baseline. Ask what system the clinic uses (Regen Lab, Eclipse, Arthrex Angel, Harvest SmartPrep, etc.) and what platelet concentration their protocol achieves.
2. Whether a scalp assessment is performed first. A practitioner who proceeds to injection without assessing whether miniaturised follicles are present is not optimising patient selection.
3. Physician-administered injections. PRP scalp injections should be performed by a licensed physician, not a beauty therapist or unlicensed technician.
4. Standardised photographic documentation. Consistent before-and-after photos taken at the same angles and lighting are necessary to assess whether treatment is working. Ask what photographic protocol the clinic uses.
Limitations and Realistic Expectations
PRP cannot regrow hair in an area that has been completely bald for years. Follicles that have regressed entirely do not respond to growth factor stimulation.
PRP effects are not permanent. The underlying process driving androgenetic alopecia continues. Without maintenance every 6 to 12 months, most patients return toward their pre-treatment pattern within 12 to 18 months.
PRP response varies between individuals. Studies report non-responders even in well-selected populations. Individual response depends on platelet quality, scalp vascularity, specific alopecia type, and hormonal environment.
PRP alone does not justify a dedicated international trip on cost grounds for most patients. As a component of a hair transplant procedure, it is a low-marginal-cost enhancement that may improve surgical outcomes.