Purpose: This study evaluated the effects of a cosmetic test product containing 3.0% Viola verecunda extract on facial skin hydration, radiance, texture, and pore characteristics. Although Viola verecunda extract has previously been used as a cosmetic ingredient for scalp care, this study represents the first controlled human application trial assessing its effects on facial skin.Methods: A 4-week, randomized, split-face clinical trial was conducted with 20 healthy women. Participants applied a gel containing 3.0% Viola verecunda extract to the test side of the face, while an identical base gel without the extract was applied to the control side; both applications were followed by ultrasound treatment. Skin hydration, radiance, texture, and pore parameters were assessed using Skin-O-mat, Focuskin, and Antera 3D devices. Statistical analyses were performed using SPSS Statistics version 26.Results: In the test group, skin hydration increased by 11.85% at week 2 and 23.86% at week 4, demonstrating statistically significant improvements compared with the control group (p<0.001). Skin radiance increased by 22.76% at week 2 and 33.87% at week 4 (p<0.05), while skin texture improved by 3.09% and 5.20% at week 2 and 4, respectively (p<0.05). Mean pore area decreased by 11.83% at week 2 and 36.84% at week 4, with a statistically significant difference observed at week 4 (p<0.05).Conclusion: The cosmetic formulation containing Viola verecunda extract produced significant improvements in facial skin hydration, radiance, texture, and pore appearance over 4 weeks. These findings support the potential expansion of Viola verecunda, a native Korean plant, as a natural functional ingredient in cosmetic formulations.
Son et al. (Thu,) studied this question.
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