Figure 1.

Effects of licochalcone A (a) or β-arbutin (b) on melanogenesis in B16 mouse melanoma cells simultaneously treated with or without 50 μmol/L capsaicin. Melanin production was assessed by performing a NaOH assay, and cells were treated for 48 h. All data are shown as mean ± standard deviation (n = 3). *P < 0.05, ** P < 0.001, compared to the control group