Results are expressed as means ± SD of three parallel measurements (n = 3). The ferric reducing antioxidant power is expressed as mmol Fe2+/g sample and the hydroxyl (OH),
nitric oxide (NO) and superoxide anion (O2 ) radical scavenging activities are expressed as IC50. The IC50 values were calculated from linear regression analysis. IC50 denotes the
effective concentration of samples used to reduce 50% of the reagent colour.