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Effect of the C. sinensis extract (CsEx) on skin energy boosting in treated volunteers vs. placebo. (a) Skin energy average value ± SD; (b) Skin energy average percentage variation vs. D0. The asterisks indicate statistically significant values vs. D0 (*** p-value was between 0.0001 and 0.001). The $ indicates statistically significant values vs. placebo ($ p < 0.05, $$$ p < 0.001).
