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 →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 →Rahman et al. (2024): Systematic Review of PRP in Medical and Surgical Specialties
E. Rahman, P. Rao, H.N. Abu-Farsakh, C. Thonse, I. Ali, A.E. Upton, S.Y. Baratikkae, J.D.A. Carruthers, A. Mosahebi, N. Heidari, W.R. Webb · Journal of Clinical Medicine, 2024PMID: 39124838
Supports: 2024 PRISMA systematic review of 75 RCTs (5,726 patients) across aesthetics and orthopaedics. Found strong positive correlation (r=0.79) between proper temperature control during PRP preparation and efficacy, and moderate correlation (r=0.57) between initial platelet count assessment and outcomes — supporting the clinic's use of controlled, high-recovery PRP preparation systems.
Limitations: Identified significant variability in PRP preparation methods across studies, making direct comparison difficult. Proposed a new scoring system (WESS-PQR) to address inconsistencies, but this has not yet been widely adopted or validated independently.
View on PubMed →*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.