PRP for Hair Loss: How Platelet-Rich Plasma Therapy Works
Platelet-Rich Plasma therapy harnesses your body's own growth factors to stimulate hair follicles. Here's what the clinical research says about how it works, what results to expect, and whether it's right for you.
What is PRP?
Platelet-Rich Plasma (PRP) therapy involves drawing a small amount of your blood, concentrating the platelets through centrifugation, and injecting the platelet-rich solution into the scalp. The goal is to deliver a concentrated dose of growth factors directly to thinning areas.
Platelets contain growth factors including PDGF (platelet-derived growth factor), TGF-β (transforming growth factor beta), VEGF (vascular endothelial growth factor), and EGF (epidermal growth factor) that promote tissue repair and stimulate dormant hair follicles back into the active growth phase.
PRP has been used in orthopedics and sports medicine for decades, treating tendon injuries, joint pain, and surgical recovery, before being adapted for hair restoration. The same regenerative principles that heal injuries can reactivate weakened hair follicles.
The PRP Procedure
The entire procedure takes 30-60 minutes. Here's what happens at each stage.
Blood Draw
10-20ml of blood is drawn from your arm, similar to a routine blood test. The process is quick and straightforward.
Centrifugation
Your blood is placed in a centrifuge and spun at high speed to separate the components. This concentrates platelets to 3-7x their normal levels.
Preparation
The platelet-rich layer is carefully extracted from the separated blood and activated to release growth factors.
Injection
PRP is injected into the scalp in a grid pattern using fine needles, targeting areas of thinning. A topical anesthetic is typically applied beforehand.
Recovery
Mild soreness for 1-2 days is normal. No downtime is needed, most patients return to normal activities immediately. Avoid washing hair for 24 hours.
Clinical Evidence
Key findings from peer-reviewed clinical studies on PRP for androgenetic alopecia.
increase compared to baseline after 3 PRP sessions
Gentile et al., Stem Cells Translational Medicine, 2015
in a 2019 systematic review concluded PRP significantly increases hair density vs. placebo
Giordano et al., Journal of Cosmetic Dermatology, 2019
until first visible improvement, with peak results at 6 months of treatment
Alves & Grimalt, Surgical and Cosmetic Dermatology, 2014
Important caveat: Results vary significantly between patients. Platelet concentration, preparation method, number of sessions, and degree of existing hair loss all affect outcomes. PRP research is promising but still evolving, with some studies showing modest effects. Discuss expectations with your provider.
What to Expect
Treatment Schedule
- Initial series: 3-4 sessions, spaced 4-6 weeks apart
- Maintenance: 1 session every 4-6 months to sustain results
- First improvement: Visible at 2-3 months after starting
- Peak results: Typically reached at 6 months
Cost & Considerations
- --Cost per session: $500-$2,000 depending on location and provider
- --Insurance: Not covered (considered cosmetic/elective)
- --Downtime: None, return to normal activities immediately
PRP works best for early-stage thinning. It's less effective for completely bald areas where follicles are no longer present.
PRP vs. Other Treatments
How PRP compares to other common hair loss treatments, and why many patients combine approaches.
PRP vs. Finasteride
PRP is procedural with no daily pills and no systemic hormonal effects. However, it is significantly more expensive per year. Many clinicians use PRP and finasteride together for a synergistic effect. PRP stimulates growth factors while finasteride blocks DHT.
PRP Advantage
No daily medication
Other Advantage
Lower cost, strong clinical data
PRP vs. Minoxidil
PRP targets growth factors directly through concentrated platelet injection, while minoxidil improves blood flow to follicles topically. PRP requires no daily application but needs in-office visits. The two treatments are complementary and often used together.
PRP Advantage
No daily routine
Other Advantage
OTC availability, low cost
PRP vs. Hair Transplant
PRP cannot restore hair in completely bald areas where follicles are no longer present, that requires a transplant. However, PRP can strengthen existing thinning hair and is often used to complement transplant recovery, improving graft survival rates.
PRP Advantage
Non-surgical, no scarring
Other Advantage
Permanent restoration of bald areas
Track Your PRP Treatment Results
Starting PRP therapy? Track your progress with AI-powered photo analysis. See exactly how your hair density and thickness respond to treatment over weeks and months.
Track My PRP ResultsFrequently Asked Questions
Does PRP for hair loss hurt?▾
Most patients describe PRP injections as mildly uncomfortable rather than painful. A topical numbing cream or local anesthetic is applied to the scalp before injection, which significantly reduces discomfort. The needles used are very fine (30-gauge). Some soreness and tenderness at the injection sites is normal for 1-2 days afterward. Most patients rate the discomfort as 3-4 out of 10.
How many PRP sessions do I need for hair loss?▾
The typical protocol is 3-4 initial sessions spaced 4-6 weeks apart, followed by maintenance sessions every 4-6 months. Some providers recommend monthly sessions for the first 3 months. The exact number depends on the degree of hair loss, your response to treatment, and the PRP preparation method used. Your dermatologist will adjust the protocol based on your progress.
Does insurance cover PRP for hair loss?▾
PRP for hair loss is considered a cosmetic or elective procedure and is not covered by health insurance in most countries. Sessions typically cost $500-$2,000 each, depending on your location, the provider, and the preparation method. Some clinics offer package pricing for the initial series of treatments. HSA or FSA funds may be eligible, check with your plan administrator.
Who is NOT a good candidate for PRP hair treatment?▾
PRP may not be suitable for people with blood disorders (thrombocytopenia, platelet dysfunction), active scalp infections or conditions, those on blood thinners or anti-platelet medications, individuals with autoimmune conditions affecting the scalp, or those with completely bald areas (PRP works best on thinning hair where follicles are still present). Smokers may also see reduced results due to impaired platelet function. A thorough medical evaluation is essential before starting PRP.