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HaCaT keratinocytes viability after stimulation with OF extracts at different concentrations (10, 25, 50, 100, and 200 µg/mL). Results are expressed as mean ± SD. Comparison among groups was made using one-way ANOVA and Dunnett’s multiple comparison post-test (* p < 0.05; ** p < 0.01; *** p < 0.001; **** p < 0.0001 vs. control).
