Fig. 4From: Antioxidant activity and cytotoxicity of Jerusalem artichoke tubers and leaves extract on HaCaT and BJ fibroblast cellsThe effect of increasing concentrations of ethanolic Helianthus tuberosus L. tubers and leaves extracts (25, 50, 100, 250, 500 μg·mL− 1) on Neutral Red Dye uptake in cultured keratinocytes cells after 24 h of exposure. Data are the mean ± SD of three independent experiments, each of which consists of three replicates per treatment group. ***p < 0.001, **p < 0.01, *p < 0.05 versus the control (100%)Back to article page