Objective The objective of this study was to compare the antioxidant effects among wild ginseng, cultivated wild ginseng, and ginseng extracts. Methods In vitro antioxidant activities were examined by total antioxidant capacity ( TAC ), oxygen radical scavenging capacity (ORAC), total phenolic content, 1, 1 -Diphenyl -2 -picrylhydrazyl(DPPH ) radical scavenging activity, inhibition of induced lipid peroxidation using liver mitochondria, reactive oxygen species (ROS) scavenging effect using 2',

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... '-dichlorofluorescein(DCF) fluorescence. Results 1. TAC of 1.5 and 3.75 mg extracts was highest in cultivated wild ginseng, followed by wild ginseng and lowest in ginseng. 2. ORAC of 2, 10, and 20 g extracts was highest in cultivated wild ginseng, followed by wild ginseng and lowest in ginseng. 3. Total phenolic content of 0.375, 0.938, and 1.875 mg extracts was highest in cultivated wild ginseng, followed by wild ginseng and lowest in ginseng. 4. DPPH(1, 1 -Diphenyl-2picrylhydrazyl ) scavenging activity between wild ginseng and cultivated wild ginseng did not differ significantly (p>0.05 ). Induced lipid peroxidation, measured by TBARS concentration in solution containing rat liver mitochondria incubated in the presence of FeSO4/ ascorbic acid was inhibited as amounts of wild ginseng, cultivated wild ginseng, and ginseng extracts increased. TBARS concentration of ginseng extracts were significantly(p<0.05 ) higher than wild ginseng or cultivated wild ginseng extracts. 6. DCF fluorescence intensity was decreased as concentrations of wild ginseng, cultivated wild ginseng, and ginseng extracts increased, demonstrating that ROS generation was inhibited in a concentrationdependent manner. Conclusions In summary, the results of this study demonstrate that cultivated wild ginseng extracts had similar antioxidant activities to wild ginseng extracts and greater that of cultivated ginseng extracts.