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Effect of the C. sinensis extract (CsEx) on ATP production in keratinocytes. The keratinocytes were stimulated with 0.0006% w/v and 0.002% w/v of CsEx for 24 h and then induced to lysis. The reported values represent the averages of three independent experiments; the control was set to 100%. 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).
