PRP for Hair Loss: What Do Studies Show?

What is PRP?

Platelet-rich plasma is prepared from the patient’s blood. Centrifugation, platelet and leukocyte concentrations and activation vary; there is no single standard preparation.

Effectiveness

Positive randomised trials exist for androgenetic alopecia. Small samples, different controls and short follow-up prevent a universal success percentage.

Where it may help

It may support thinning areas where follicles remain. Creating new follicles in completely follicle-free scarred tissue has not been established.

Risks

Injection pain, bleeding, infection and vasovagal reactions are possible. Aseptic technique matters.

After transplantation

PRP cannot be claimed to guarantee every graft’s survival. Standardised photographs and trichoscopy support objective follow-up.

Limits of the evidence

These are selected clinical sources and expert recommendations, not a new systematic review. Formulations, participants, controls, follow-up and adverse-event reporting differ. Positive findings do not establish identical benefit or local authorisation for every patient or product.

Topic-specific questions

Scientific references

1. Rosenthal A et al. Management of androgenic alopecia: a systematic review of the literature. J Cosmet Laser Ther. 2024. DOI: 10.1080/14764172.2024.2362126. https://pubmed.ncbi.nlm.nih.gov/38852607/
2. Landells I et al. A Canadian Consensus on Androgenetic Alopecia: Approach and Management. J Cutan Med Surg. 2025. DOI: 10.1177/12034754251368849. https://pubmed.ncbi.nlm.nih.gov/40986632/
3. Vañó-Galván S et al. A Consensus Statement From the Spanish Hair Disorders Group of the Spanish Academy of Dermatology and Venereology on the Management of Androgenetic Alopecia. 2024. https://doi.org/10.1016/j.ad.2023.10.043
4. American Academy of Dermatology. Hair loss: Diagnosis and treatment. https://www.aad.org/public/diseases/hair-loss/treatment/diagnosis-treat