Figure 2.

Difference between the antioxidant capacity of commercially available silymarin SA (black columns) and corresponding artificial mixture of flavonolignans (grey columns) determined using ABTS (a), ORAC (b), DPPH (c), and CAA assays (d). The lower the value of relative radical quenching activity, the higher antioxidant activity. The same volume of stock solutions [1 g/L] was used in each assay. Data are presented as the average of six replicates with appropriate SEM. Data were analysed by one-way analysis of variance (ANOVA) followed by Duncan’s post-hoc test (p > 0.05), the statistical differences are indicated by letters.