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

This study investigated the effects of a shampoo containing Plantago asiatica L. on hair health in adults aged 20–60 over a 12-week period. Participants using the test shampoo showed progressive improvements in hair strand thickness and density, with increases of up to 0.020 mm in thickness and 1.1 hairs/cm² in density by week 12. Additionally, there was a significant reduction in hair shedding compared to the placebo group. The results indicate that the shampoo effectively enhances hair thickness and density while reducing hair loss, providing a natural option for addressing hair care concerns.