Figure 2.

Effect of the aqueous extract of strawberry tree leaves (STE) and arbutin (ARB) on the viability of PK-15 cells after 24 h treatment in vitro. Cell samples were processed in triplicate. Viability was determined using the MTS assay, and the percentage of viability was expressed relative to the control (whose value was considered 100%). Values are expressed as mean ± standard deviation. NC—untreated control. Comparisons between the values obtained for cell viability were performed using ANOVA with Tukey’s HSD post hoc test. No difference was significant at p < 0.05.