Hydrogen peroxide is generated in vivo by several oxidase enzymes. Hydrogen peroxide is scavenged via its reduction product hydroxyl radical (OH•). In this method, when a scavenger is incubated with hydrogen peroxide, the decay or loss of hydrogen peroxide can be measured spectrophotometrically at 230 nm [24 ,25].% inhibition=(Absorbance of control–Absorbance of sample) / Absorbance of control × 100