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Effect of extract (A) and gallic acid (B) on cell viability. Melanocyte viability was assessed by MTT after 48 h incubation with cell culture media as positive control (C+), extract and gallic acid. Each bar represents the mean ± SD of 3 independent experiments. * p < 0.05; *** p < 0.001; **** p < 0.0001; ns = non-significant.
