Briefly, 1 ml of sample was mixed with 2.4 ml of 0.1 M phosphate buffer (pH 7.4), and then 0.6 ml of 43 mM solution of H 2O2 in the same buffer were added. The mixture was incubated at room temperature for 40 min and the absorbance values of the reaction mixtures at 230 nm were recorded against a blank solution containing phosphate buffer without H2O2 for each sample. The hydrogen peroxide scavenging activity was measured according to the following