DPPH is a free radical, stable at room temperature, which produces a violet solution in ethanol. The reduction of DPPH• is monitored by decrease of the absorbance of its radical at 517 nm. It is reduced in the presence of an antioxidant molecule resulting in uncolored ethanol solutions. The DPPH assay is an easy and rapid way to evaluate antioxidant activity (Silva et al., 2005). Results of DPPH reduction produced by all extracts tested are shown in Table 2. The potential antioxidant of the CGE showed a significant free radical scavenging activity comparing with the high antioxidant effect of quercet in (a potent natural antioxidant)