Zhang et al. (2023): PRP for Androgenetic Alopecia — Systematic Review and Meta-Analysis of RCTs
X. Zhang, Y. Ji, M. Zhou, X. Zhou, Y. Xie, X. Zeng, F. Shao, C. Zhang · Canadian Journal of Plastic Surgery, 2023PMID: 37533146
Supports: 2023 systematic review and meta-analysis of 9 RCTs (238 patients) demonstrating PRP significantly increases hair density at 3 and 6 months compared with placebo (P<.05) in androgenetic alopecia. No serious adverse reactions reported across studies.
Limitations: Relatively small total sample size (238 patients across 9 RCTs). PRP increased hair count and hair diameter vs baseline but without statistically significant difference vs placebo. Heterogeneity in PRP preparation protocols across included studies.
View on PubMed →Gupta et al. (2019): PRP Efficacy in Hair Restoration and Facial Aesthetics — Systematic Review and Meta-analysis
A.K. Gupta, S.G. Versteeg, J. Rapaport, A.K. Hausauer, N.H. Shear, V. Piguet · Journal of Cutaneous Medicine and Surgery, 2019PMID: 30606055
Supports: Systematic review and meta-analysis demonstrating 3 monthly PRP injections exhibit significantly greater efficacy over placebo for hair density in androgenetic alopecia (mean difference: 25.61 hairs/cm², P=0.02). Also found 2-4 PRP sessions combined with traditional therapies can minimise acne scarring and improve aesthetic outcomes — supporting PRP's broad application across hair and facial rejuvenation.
Limitations: Studies used half-head design which may have influenced results due to systemic PRP effects. Data for non-hair indications (scarring, facial burns, ageing skin) are less robust in design. Focused on mild AGA — less evidence for advanced hair loss stages.
View on PubMed →Gentile et al. (2015): PRP for Androgenetic Alopecia — Clinical Trial
P. Gentile, S. Garcovich, A. Bielli, M.G. Scioli, A. Orlandi, V. Cervelli · Stem Cells Translational Medicine, 2015PMID: 26400925
Supports: Landmark clinical trial confirming significant hair density and thickness increases using standardised PRP protocols for male and female pattern hair loss.
Limitations: Single-centre study with relatively small sample size. Earlier generation PRP preparation protocols may differ from current CE-certified systems.
View on PubMed →NHS Clinical Guidance: Hair Loss Diagnosis
National Health Service (NHS) · NHS, 2024
Supports: Diagnostic standards for identifying male and female pattern baldness (androgenetic alopecia) and understanding treatment pathways within the UK healthcare system.
Limitations: General public health guidance — does not specifically evaluate PRP as a treatment option.
View on NHS →*PRP London Clinic provides these references for educational purposes. Our Clinical Board regularly reviews emerging peer-reviewed literature to ensure our protocols align with the latest advancements in regenerative medicine.