PRP for Hair Loss in Women: Does It Work, How Many Sessions, and Who Should Skip It
Pooled trials suggest platelet-rich plasma (PRP) injections can raise hair density in women, but the evidence is low quality, protocols vary, and a well-known US trial found no significant difference from saline. Expect 3 monthly sessions and then repeat visits every 3 to 6 months, ideally alongside a proven treatment.
By Kymata Health Editorial Published Last checked
We earn a commission if you buy through links on this page. It never changes our grades or rankings. How we make money →
This guide
Women's Hair Loss- Question
- Does PRP work for female hair loss, and how many sessions does it take?
- Sources
- 7 cited
- Quick answers
- 3 questions
- Clinician review
- None; sources cited inline
Key takeaways
5 points- In a 2024 meta-analysis of 21 randomized trials in 628 women, PRP injections increased hair density and thickness, and side effects were mostly mild and short-lived1.
- A review by Italy's National Blood Centre rated the evidence low quality: across trials in pattern hair loss, PRP beat saline injections by about 26 hairs per cm² on average, with a wide range of uncertainty2.
- In a US split-scalp trial of 35 people, PRP-treated and saline-treated patches both gained hair, and the difference between them was not significant3.
- The AAD says most patients return once a month for 3 months, then every 3 to 6 months6.
- Topical minoxidil is still the only FDA-approved treatment for female pattern hair loss; a 2026 review describes PRP as an add-on often best used with medical treatment5.
What PRP is
Platelet-rich plasma (PRP) is made from your own blood: a small amount is drawn, spun in a machine that separates it into parts, and the platelet-rich part is injected into the thinning areas of the scalp. The American Academy of Dermatology (AAD) says the procedure takes about 10 minutes and usually needs no downtime6.
There is no single standard recipe. A review of PRP trials found different preparations (activated and non-activated) and different schedules, and much of the outcome data could not be pooled because of how differently it was reported2.
PRP is not a drug with an FDA label for hair loss. The AAD notes that because PRP is prepared with needles and a centrifuge, the FDA classifies it as a medical device, and the rules for devices do not require the large trials needed for new drugs7.
What the trials show
A 2024 meta-analysis pooled 21 randomized trials with 628 women with several types of hair loss. PRP improved hair density and thickness and reduced the number of hairs that came out on a pull test. Results varied with dose, treatment length and ethnicity, and the authors declared no conflicts of interest1.
A 2023 review by Italy's National Blood Centre, covering men and women, was more cautious. In pattern hair loss, PRP raised hair density by an average of 25.6 hairs per cm² over saline injections at medium-term follow-up, but the 95% confidence interval ran from about 3 to 49, the evidence was rated low quality, and the authors concluded the evidence of benefit is limited2.
In a randomized trial at NYU, 35 people with pattern hair loss had PRP injected into one tattooed square of scalp and saline into another, once a month for 3 months. Three months after the last session, density in the PRP square had risen from about 151 to 171 hairs per cm², but the saline square also rose, from about 151 to 167, and the difference between the two was not significant. The authors note PRP may have spread to the saline side3.
PRP vs minoxidil, and using both
Topical minoxidil is the only FDA-approved treatment for female pattern hair loss, according to a 2026 review by NYU dermatologists, which describes PRP and low-level light therapy as add-ons that are often best used together with medical treatment5. Two of its senior authors report industry ties; Dr Shapiro's include Regen Lab and DS Laboratories5.
A network meta-analysis of 27 trials (1,110 men and women) ranked 5% minoxidil plus PRP above 5% minoxidil alone or PRP alone for hair density at 24 weeks; the clearest result was for 5% minoxidil plus microneedling, which beat minoxidil, PRP and microneedling alone4. Our minoxidil guide compares the foam, the solution and low-dose tablets.
How many sessions, and when to expect results
The AAD says most patients return once a month for 3 months and then once every 3 to 6 months, and that within the first few months you may notice you are losing less hair6. PRP is a repeat treatment, not a one-off.
In the NYU trial, hair was measured 3 months after the third monthly session3; in the 2024 meta-analysis, dose and treatment length changed the results1. The AAD's page on cosmetic PRP puts the cost at $250 to $1,500 per session and says insurance does not cover it7.
Side effects, and who should skip it
In the 2024 meta-analysis, side effects were generally mild and transient, and pain or discomfort was no more common with PRP than with control treatments1. The 2023 review found no serious adverse events with PRP or with control injections2.
The AAD says the biggest risk comes from how your blood is handled: it must be kept sterile to avoid infection, and the clinic should follow the same checks transfusion centers use so that you receive only your own blood7.
- On its page about cosmetic PRP, the AAD says PRP is not recommended for people with hepatitis C, HIV or AIDS, any blood cancer, heart disease that requires a blood thinner, or skin cancer in the area to be treated7.
- See a board-certified dermatologist before paying for PRP. The AAD says effective treatment begins with finding the cause, and some hair loss regrows on its own, for example after having a baby or losing 20 pounds or more6. Our telogen effluvium guide covers shedding.
- If you are also offered spironolactone, the AAD warns it can cause birth defects, so anyone who could become pregnant is prescribed birth control with it6. See our spironolactone guide.
- Plan for upkeep: PRP is repeated every 3 to 6 months after the first 3 monthly sessions, and the AAD says minoxidil's benefits are lost if you stop applying it6.
Where to buy
Happy Head
Paid links · we earn a commissionAn online hair-loss clinic. PRP is done in person, so it is not part of this service; Happy Head offers medical treatments of the kind PRP is usually combined with. A board-certified dermatologist reviews your online consultation and decides whether to prescribe; options include oral spironolactone and custom topicals or capsules (for example spironolactone with minoxidil). Its custom formulas are compounded, so they are not FDA-approved, and spironolactone is not for anyone who is or may become pregnant. Happy Head lists custom formulas at $59 to $119 a month (checked Oct 13, 2026).
Start a Happy Head consultation (paid link, opens in new tab)
Quick answers
Questions
3 answersDoes PRP work for female pattern hair loss?
It may help. Pooled trials in women found more hair density and thickness1, but a separate review rated the evidence low quality2, and a US split-scalp trial found no significant difference from saline3. Topical minoxidil is the only FDA-approved treatment5.
How many PRP sessions will I need?
The AAD says most patients return once a month for 3 months, then once every 3 to 6 months6.
Is PRP FDA-approved for hair loss?
There is no drug approval for it. The AAD says the FDA classifies PRP as a medical device because it uses needles and a centrifuge, and device rules do not require the large trials needed for new drugs7.
More in Women's Hair Loss
Keep reading
6 pages- Women's Hair Loss hubEvery guide, regulatory notes and sources
- Minoxidil for Women: Topical Foam vs Low-Dose Pills, by the Trials
- Spironolactone for Female Pattern Hair Loss: What the Evidence Shows
- Hair Loss Supplements for Women: Biotin, Nutrafol and What the Trials Show
- Telogen Effluvium: How Long Does Stress or Postpartum Hair Shedding Last?
- Finasteride for Women: Is It Safe, and Does It Work for Female Hair Loss?
Keep reading: Menopause and HRT
Menopause and HRT: every pageWomen's hormone telehealth comparedBrowse all topics
- Previous in this topicTelogen Effluvium: How Long Does Stress or Postpartum Hair Shedding Last?Heavy shedding usually starts 2 to 4 months after a trigger such as childbirth, illness, rapid weight loss or stopping the pill, and hair tends to regain its fullness within 6 to…
- Next in this topicFinasteride for Women: Is It Safe, and Does It Work for Female Hair Loss?Finasteride is not FDA-approved for women and must not be used in pregnancy because it can harm a male fetus.
- Iron Pills Without the Stomach Upset? The Case for Every-Other-Day DosingIron works, but ferrous sulfate roughly doubles the odds of stomach trouble.
- PCOS (Now PMOS) and Irregular Cycles: Diagnosis, Treatment and Supplements, by the EvidencePCOS was renamed polyendocrine metabolic ovarian syndrome (PMOS) in 2026, but how it is diagnosed has not changed.
- Zinc Picolinate, Citrate or Gluconate? The Absorption Data, and Why More Zinc Can Cost You CopperZinc labels compete on form and milligrams.
References
Every study and document cited in this guide, numbered as in the text.
Sources
7 sources- 1Effectiveness of platelet-rich plasma in treating female hair loss: A systematic review and meta-analysis of randomized controlled trials. Skin Res Technol, 2024. PMID 39177365
- 2Platelet-rich plasma for the treatment of alopecia: a systematic review and meta-analysis. Blood Transfus, 2023. PMID 34967722
- 3Evaluation of platelet-rich plasma as a treatment for androgenetic alopecia: A randomized controlled trial. J Am Acad Dermatol, 2020. PMID 32653577
- 4Relative Effects of Minoxidil 5%, Platelet-Rich Plasma, and Microneedling in Pattern Hair Loss: A Systematic Review and Network Meta-Analysis. Skin Appendage Disord, 2023. PMID 38058547
- 5Androgenetic Alopecia in Women: A Narrative Review of Pathophysiology, Clinical Evaluation, and Treatments. Am J Clin Dermatol, 2026. PMID 41714473
- 6Hair loss: Diagnosis and treatment. American Academy of Dermatology, 2022.
- 7Is platelet-rich plasma the secret to younger-looking skin?. American Academy of Dermatology, 2026.
Dietary supplements are not intended to diagnose, treat, cure or prevent any disease, and these statements have not been evaluated by the FDA. Prescription options need a licensed clinician. Talk to your clinician or pharmacist before starting anything new, especially if you take prescription medicines, are pregnant or breastfeeding.