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Inhibition concentrations (IC50) of positive controls (gallic acid, quercetin and vitamin C) and RBEs (R.RBE and P.RBE) required to scavenge (a) DPPH, (b) ABTS, and (c) H2O2 by 50%. Data are expressed as mean ± SEM (n = 3). Significant differences are represented by: ∗p < 0.05; ∗∗p < 0.01 (two-tailed unpaired t-test).
