What is the recommended dosage for PRP Therapy?

Hair Loss: 3-4 sessions, 4-6 weeks apart

What are the side effects of PRP Therapy?

Potential side effects include: Injection site pain and tenderness, Scalp swelling and redness (1-2 days), Headache following treatment, Rare: infection at injection site.

What is PRP therapy for hair loss?

Platelet-rich plasma (PRP) therapy involves drawing a patient's blood, concentrating the platelets, and injecting the plasma into the scalp. The growth factors in PRP may stimulate dormant hair follicles and promote new growth. A 2019 systematic review in Dermatologic Surgery found that PRP may increase hair density and thickness in androgenetic alopecia patients. Results vary, and multiple sessions are typically required.

How many PRP sessions are needed for hair growth?

Most clinical protocols involve 3-4 initial PRP sessions spaced 4-6 weeks apart, followed by maintenance treatments every 3-6 months. A 2020 meta-analysis in the Journal of Cosmetic Dermatology reported that most studies showing positive results used at least 3 sessions. Individual response varies based on the degree of hair loss and platelet concentration achieved.

How does PRP therapy work for hair loss?

Platelet-rich plasma (PRP) therapy involves drawing a small amount of the patient's blood, concentrating the platelet-rich fraction through centrifugation, and injecting it into the scalp. Platelets release growth factors — including PDGF, VEGF, and TGF-beta — that may stimulate follicle stem cells and extend the anagen (growth) phase. Research across 57 studies with 6,423 participants supports Grade A (Strong) evidence for androgenetic alopecia.

How long do PRP hair results last?

Clinical studies suggest PRP results for hair loss may begin to diminish after 6 to 12 months without maintenance sessions. Most protocols use a series of 3 to 4 initial injections spaced 4 to 6 weeks apart, followed by maintenance sessions every 3 to 6 months. Research across 57 studies with 6,423 participants indicates that sustained benefit generally requires ongoing treatment, as PRP does not permanently alter the underlying causes of androgenetic alopecia.

Can PRP therapy help with alopecia areata?

Research across 21 studies with 2,376 participants demonstrates Grade A (Strong) evidence for PRP in alopecia areata. PRP may help by suppressing the autoimmune attack on hair follicles via immunomodulatory platelet proteins, while simultaneously delivering growth factors that support follicle re-entry into the anagen phase. It is often used when topical corticosteroids have provided insufficient response.

PRP Therapy

procedure

Also known as: Platelet-Rich Plasma

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About

Platelet-Rich Plasma (PRP) therapy involves injecting concentrated platelet-derived growth factors directly into the scalp to stimulate hair follicle activity. Multiple RCTs show improvements in hair density, though protocols vary widely and standardization remains a challenge.

How It Works

Platelet-derived growth factors (PDGF, VEGF, EGF) stimulate dermal papilla cells and prolong anagen phase.

Evidence For Conditions

Condition	Grade	Studies	Participants
Androgenetic Alopecia	A	144	8892	View →
Alopecia Areata	A	89	2500	View →

Side Effects

Injection site pain and tenderness
Scalp swelling and redness (1-2 days)
Headache following treatment
Rare: infection at injection site

Drug & Supplement Interactions

NSAIDs and aspirin (discontinue 1 week before PRP; affect platelet function)
Anticoagulants (may increase bruising; consult physician)
Corticosteroid injections (may reduce PRP effectiveness)

Always inform your healthcare provider about all supplements you take.

Related Ingredients

Microneedling

Quick Facts

Dosage: Hair_Loss: 3-4 sessions, 4-6 weeks apart
Forms: injection
Upper Limit: Not applicable
Best Time: In-clinic procedure; avoid washing hair for 24 hours after treatment

Evidence Summary

Androgenetic Alopecia A

Alopecia Areata A

FDA Disclaimer: These statements have not been evaluated by the Food and Drug Administration. The products and information on this website are not intended to diagnose, treat, cure, or prevent any disease. The evidence grades presented are based on our analysis of published peer-reviewed research and do not constitute medical advice. Always consult your healthcare provider before starting any supplement regimen.