A Pilot Randomized Controlled Trial (RCT) Evaluating the Efficacy of an Exosome-Containing Plant Extract Formulation for Treating Male Alopecia
Abstract
Background/Objectives: Hair loss affects self-esteem, confidence, and psychological well-being. Exosomes, as molecular carriers of growth factors and active compounds, offer a promising treatment. This study evaluates the efficacy of an exosome formulation containing extracts from two known hair-regenerating plants, Ecklonia cava and Thuja orientalis (ECPE), for male pattern alopecia. Methods: A randomized controlled trial included 20 male participants with Norwood grade 2–3 androgenetic alopecia who were randomly assigned into two groups, placebo (0.9% sodium chloride) and ECPE, administered bi-weekly across four sessions. Evaluations included hair density measurements, adverse effect tracking, and self-assessments. Results: Most participants (55%) were aged 18 to 35, with 75% reporting hair loss for over a year and 80% noting scalp thinning. The hair counts showed no significant change in the placebo group from baseline to week 16 (Wilcoxon signed-rank test: V = 13.5, p = 0.163), while a significant increase was observed in the ECPE group (V = 0, p = 0.002). Between-group analysis revealed a significant difference in the hair count changes (Wilcoxon rank-sum test: W = 86.5, p = 0.006) with a large effect size (Cliff’s Delta: & = 0.73, 95% CI: 0.41–0.89), with the ECPE group showing higher median hair growth (9.5, IQR = 16.88) compared to the placebo group (1.5, IQR = 3.00). A Bayesian ANCOVA, adjusted for covariates (the father’s scalp hair condition, baseline hair count,…
How strong is the evidence?
Evidence Hub reads this as a randomized trial, done in people. Its evidence level is 3 of 5 (Moderate · trial / cohort / secondary analysis). Trials without a large randomized design, cohorts and secondary analyses give moderate evidence. Reported size: 20 participants or records.
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