How PRP Works: The Biology of Hair Regrowth
Platelet-rich plasma (PRP) hair restoration leverages your own blood's regenerative biology to stimulate dormant hair follicles. The process begins with a simple blood draw. A centrifuge separates the plasma layer — rich in platelets — from red blood cells. The resulting PRP concentrate contains platelet concentrations several times higher than whole blood, packed with growth factors that govern tissue repair and cellular regeneration.
When injected into the scalp, these growth factors — including platelet-derived growth factor (PDGF), vascular endothelial growth factor (VEGF), transforming growth factor-beta (TGF-β), and insulin-like growth factor (IGF) — bind to receptors in hair follicle cells. This triggers a cascade of downstream signaling:
- PDGF stimulates dermal papilla cell proliferation — the cells at the base of each follicle that control hair growth cycling.
- VEGF promotes angiogenesis (new blood vessel formation), improving nutrient and oxygen delivery to the follicle microenvironment.
- TGF-β helps regulate the hair growth cycle, potentially shifting follicles from the telogen (resting) phase toward the anagen (active growth) phase.
- IGF supports follicle cell survival and differentiation.
The net effect is a biochemical signal to the follicle: wake up, grow, and sustain. For follicles that are miniaturized — the hallmark of androgenetic alopecia — PRP may partially reverse this miniaturization by restoring the cellular environment that supports healthy hair shaft production.
Learn more about PRP Hair Restoration
Clinical Evidence: What the Research Shows
The evidence base for PRP in hair loss has grown substantially. Multiple randomized controlled trials and systematic reviews have examined its efficacy across different populations and alopecia types.
Androgenetic Alopecia
Alves and Grimalt, publishing in Dermatologic Surgery, conducted a randomized half-head trial in patients with androgenetic alopecia. Participants receiving PRP injections showed statistically significant improvements in hair density and hair shaft caliber compared to the placebo-treated side. The study highlighted that PRP's effects were most pronounced in the vertex and frontal scalp regions — areas with the highest follicular density.
Gentile et al., in a study published in PLOS ONE, evaluated PRP using both clinical measurement and histological analysis. Biopsies from PRP-treated scalp showed measurable increases in follicle density, Ki-67 proliferation markers, and vascular density — cellular-level confirmation of the growth factor mechanism described above, not just surface-level hair count changes.
Alopecia Areata
Trink et al., publishing in the Journal of the American Academy of Dermatology (JAAD), examined PRP versus triamcinolone acetonide (a standard corticosteroid injection) in alopecia areata. PRP demonstrated superior outcomes in terms of hair regrowth rates and recurrence prevention, suggesting immunomodulatory effects beyond simple growth factor delivery — a finding that has since prompted further investigation into PRP's T-regulatory cell pathways.
Systematic Review Evidence
A meta-analysis by Gupta and Carviel, published in the Journal of Dermatological Treatment, synthesized data across multiple PRP hair studies. The pooled analysis supported PRP as an effective adjunct treatment for hair loss with a favorable safety profile, while noting that standardization of PRP preparation protocols — platelet concentration, activation method, injection depth — remains an area requiring further research.
It is important to interpret this evidence with nuance. Study populations vary, PRP preparation kits differ, and "response" is defined differently across trials. Individual results depend on the underlying cause of hair loss, follicle viability, and treatment adherence.
PRP vs. Adjacent Mechanisms: How It Compares
Understanding PRP's place in the hair restoration landscape requires comparing it to other available options:
| Treatment | Mechanism | Invasiveness | Evidence Level | Best Candidacy |
|---|---|---|---|---|
| PRP | Autologous growth factors, follicle stimulation | Minimally invasive (injections) | Moderate–strong RCT evidence | Early–mid androgenetic alopecia |
| Minoxidil | Vasodilation, potassium channel opening | Topical (non-invasive) | Strong, long-established | Broad, multiple alopecia types |
| Finasteride / Dutasteride | DHT suppression via 5α-reductase inhibition | Oral (non-invasive) | Strong in males | Primarily male androgenetic alopecia |
| Low-Level Laser Therapy | Photobiomodulation, mitochondrial activation | Non-invasive | Moderate | Adjunct in androgenetic alopecia |
| Hair Transplant (FUE/FUT) | Surgical follicle relocation | Surgical | Definitive | Advanced loss with donor availability |
| Exosome Therapy | Extracellular vesicle signaling | Minimally invasive | Emerging (early clinical) | Investigational |
PRP's distinct advantage lies in its autologous nature — using your own biological material eliminates immunological rejection risk and avoids the systemic side effect profiles of oral medications. It occupies a meaningful middle ground: more mechanistically targeted than topical agents, less invasive and lower risk than surgery.
Many physicians now recommend PRP as a complement to medical therapy rather than a standalone. Combined protocols — PRP alongside minoxidil, or post-surgical PRP to support transplanted follicle survival — are increasingly common in clinical practice.
Who Is a Good Candidate? Physician Evaluation at SkinArtMD
Not every patient experiencing hair loss will respond equally to PRP. Candidate evaluation is a critical step — one that Dr. Sharon Fong, our CPSBC-registered physician at SkinArtMD in Burnaby, conducts during an initial consultation.
Ideal Candidates Generally Include
- Individuals with early-to-moderate androgenetic alopecia (male or female pattern hair loss), where follicles are miniaturized but not yet absent
- Patients with alopecia areata, particularly in conjunction with other therapies
- Those experiencing diffuse thinning from nutritional deficiencies or telogen effluvium, once the underlying trigger is addressed
- Patients seeking to augment the results of hair transplant surgery, either pre- or post-procedure
- Individuals motivated by non-surgical options who have realistic expectations
What Dr. Fong Evaluates at Consultation
Dr. Fong performs a detailed scalp examination, often using dermoscopy to assess follicular density, miniaturization patterns, and scalp inflammation. A full medical history review addresses:
- Duration and pattern of hair loss
- Family history (genetic predisposition)
- Current medications — anticoagulants, for example, affect candidacy and timing
- Nutritional status: iron, ferritin, vitamin D, and thyroid function; deficiencies must be corrected first
- Platelet count and overall blood health
Many of our clients in Burnaby come in after noticing diffuse thinning and are unsure whether their hair loss is hormonal, nutritional, or stress-related. A physician-led assessment helps distinguish these presentations — because treating the wrong mechanism won't produce the results patients hope for.
Book a Consultation to have your scalp assessed by Dr. Fong before starting any treatment plan.
Limitations and Contraindications
PRP is well-tolerated, but it is not appropriate for everyone, and understanding its limitations leads to better outcomes.
Contraindications
- Active scalp infection or inflammatory skin conditions — PRP may exacerbate active flares of seborrheic dermatitis or scalp psoriasis
- Blood disorders or platelet dysfunction — PRP relies on platelet function; thrombocytopenia or qualitative platelet defects compromise efficacy
- Anticoagulant therapy (warfarin, direct oral anticoagulants) — requires physician assessment of bleeding risk and altered platelet function
- Active cancer or history of haematological malignancy — growth factor delivery in oncology contexts requires specialist consultation
- Systemic infections or significant immunosuppression — increases risk of procedure-related complications
- Pregnancy — PRP is not recommended during pregnancy due to insufficient safety data
Realistic Limitations
- PRP does not regrow hair where follicles are completely absent (scarring alopecia, fully bald areas). If follicles are gone, there is no biological substrate to stimulate.
- Results are not permanent — maintenance sessions, typically every 6–12 months after an initial series, are needed to sustain benefits.
- Response varies meaningfully between individuals. Younger patients with shorter hair loss duration and higher baseline platelet counts tend to respond more robustly.
- Multiple sessions are required before results become visible. Hair cycling means noticeable improvement typically takes 3–6 months from the first session.
Health Canada has authorized PRP procedures within appropriate clinical contexts. The safety profile is favorable given PRP's autologous nature — the primary risks are procedure-related (temporary scalp discomfort, minor swelling, and rare infection at injection sites) rather than systemic.
The Treatment Process: Step by Step
For patients at SkinArtMD in Burnaby, a PRP hair session follows a structured protocol:
- Blood draw — Approximately 30–60 mL of blood is collected from your arm, similar to a routine lab draw.
- Centrifugation — The blood is spun in a medical centrifuge to separate and concentrate the platelet-rich plasma layer.
- Scalp preparation — The treatment area is cleansed; topical numbing cream is applied for comfort.
- Injection — PRP is delivered across the scalp using fine needles in a grid pattern, targeting areas of active thinning.
- Post-treatment guidance — Aftercare includes avoiding washing hair for 24 hours, avoiding strenuous exercise for 48 hours, and avoiding anti-inflammatory medications that may blunt the beneficial inflammatory phase of healing.
Total session time is approximately 60–90 minutes. No significant downtime — most patients return to their normal routine the same day, though mild scalp tenderness and temporary redness are common in the 24–48 hours following treatment.
An initial series typically consists of 3–4 sessions spaced 4–6 weeks apart, followed by maintenance sessions determined by individual response.
Patients often tell us the injections are more comfortable than they expected — especially with topical numbing applied beforehand. The brief discomfort is consistently described as worthwhile once hair density improvements begin to appear.
Book a Consultation to discuss a treatment schedule tailored to your hair loss pattern and goals.
Why Choose SkinArtMD for PRP Hair Restoration?
Physician-led care. Dr. Sharon Fong brings both medical expertise and aesthetic sensibility to every consultation. Hair loss evaluation at SkinArtMD is not delegated to non-physician staff — you receive a proper medical assessment that informs a treatment plan matched to your specific presentation.
Advanced centrifuge protocols. PRP quality depends heavily on preparation methodology. SkinArtMD uses validated centrifugation protocols designed to achieve optimal platelet concentration — a meaningful differentiator from centers using lower-quality PRP kits.
Personalized treatment plans. Many of our patients in Burnaby and the Greater Vancouver area combine PRP with complementary approaches — nutritional optimization, topical treatments, or post-transplant recovery protocols. Dr. Fong coordinates these components into a coherent plan rather than treating PRP as a standalone product.
Bilingual care. Our team communicates fluently in English and Mandarin Chinese (普通话 / 广东话), ensuring that nuanced medical conversations about candidacy, expectations, and contraindications are clearly understood. Hair loss can be emotionally sensitive, and comfort in your preferred language matters.
Convenient location. Our clinic in the Metrotown area of Burnaby is easily accessible for patients throughout Greater Vancouver — Richmond, Vancouver, Coquitlam, Surrey, and beyond.
Limited consultation spots are available each month. Book a Consultation to secure your assessment with Dr. Fong.
Frequently Asked Questions
How many PRP sessions will I need? Most protocols begin with an initial series of 3–4 sessions spaced 4–6 weeks apart. After completing the initial series, maintenance sessions every 6–12 months help sustain results. Individual response varies; some patients notice meaningful improvement after 2–3 sessions, while others require the full initial series before changes become apparent.
How long before I see results from hair PRP treatment? Hair follicles cycle slowly. Visible improvement typically begins 3–4 months after the first session, with more significant changes apparent at the 6-month mark. Because hair grows slowly, patience and adherence to the full protocol are essential for accurately evaluating PRP's effect.
Is PRP hair restoration painful? Topical numbing cream is applied prior to injections to minimize discomfort. Most patients describe mild pressure or a brief stinging sensation during injections rather than significant pain. Scalp tenderness and occasional mild swelling resolve within 24–48 hours.
Can platelet-rich plasma hair treatment be combined with other therapies? Yes — combination approaches are often more effective than PRP alone. Dr. Fong may recommend concurrent use of topical minoxidil, targeted nutritional supplementation, or PRP as an adjunct to hair transplant surgery, depending on your situation.
Is PRP safe? Are there side effects? PRP's autologous nature means systemic allergic reactions are not a concern. Procedure-related side effects — scalp tenderness, temporary redness, minor swelling — typically resolve within a few days. Infection risk is very low with proper sterile technique. Patients on blood thinners or with platelet disorders are identified and excluded during the consultation assessment.
How much does PRP hair restoration cost? Contact us for current pricing. Treatment costs depend on the number of sessions included in your personalized plan.
Is PRP hair restoration covered by insurance? PRP hair restoration is considered an elective aesthetic treatment and is not covered by BC's Medical Services Plan (MSP) or most private insurers.
Who is not a good candidate for PRP? Individuals with active scalp infections, blood disorders, haematological malignancies, those on anticoagulant therapy, or patients with fully scarred scalp areas are not appropriate candidates. A thorough consultation with Dr. Fong will determine whether PRP is the right option for your specific situation.
Next Steps
If you have been researching PRP for hair loss, you have already taken an important first step. The next is a proper medical evaluation — because effective treatment begins with an accurate diagnosis. Whether your hair loss is androgenetic, stress-related, nutritional, or mixed in origin, Dr. Fong at SkinArtMD can help you understand what is actually happening at the follicular level and whether platelet-rich plasma hair restoration belongs in your plan.
Ready to See What PRP Hair Restoration Can Do for You?
Our medical team at SkinArtMD in Burnaby is ready to create your personalized treatment plan. Book your complimentary consultation today — available in English and Chinese.
This article is for educational purposes only and does not constitute medical advice. Please consult with a qualified healthcare professional before undergoing any treatment.
