Effects of Shampoo Containing Plantago Asiatica L. on Hair Thickness, Density, and Shedding: A Double-Blind, Randomized, Placebo-Controlled Clinical Study

This study evaluated the effects of a shampoo containing Plantago asiatica L. on hair health in a double-blind, randomized, placebo-controlled clinical trial with 40 female participants over 12 weeks. The test group using the shampoo showed significant improvements in hair thickness and density, with changes in thickness of 0.009 mm at 4 weeks, 0.017 mm at 8 weeks, and 0.020 mm at 12 weeks, and a 78.80% reduction in hair shedding compared to the placebo group. These results suggest that Plantago asiatica L. may effectively promote hair retention and reduce hair loss, offering a natural alternative to traditional treatments with fewer side effects. However, the study's small sample size and single-center setting limit the generalizability of the findings, and further research is needed to confirm long-term safety and efficacy.