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Melanogenesis assay in B16F10 melanoma cells treated with amla branch extract (PE), sinapic acid (SiA), theophylline (TP), and kojic acid (KJ) at 0.0001–0.1 mg/mL: (a) melanin content, (b) tyrosinase activity, and (c) TRP-2 activity. ∗ indicates the significant difference from the control (∗p < 0.05, ∗∗p < 0.001).
