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Effect of the C. sinensis extract (CsEx) on cytosolic ROS production in keratinocytes. The keratinocytes were stressed with H2O2 (450 µM), then treated with 0.0006% and 0.002% CsEx for 2 h and then induced to lysis. The bars represent the standard deviations, and the asterisks indicate the p-value according to Student’s t test (* p < 0.05, ** p < 0.01, *** p < 0.001).
