The aim of this study was to evaluate the effect of extraction methods and organic solvents on activity of antioxidant from Moringa oleifera leaves and stems. The results showed that antioxidant ability of Moringa oleifera leaves were higher than their stems. As using the same extracting solvent, content of antioxidant compounds in Soxhlet extraction method was higher than that in hot solvent extraction method. The efficiency of extraction by methanol was better than by ethanol. The highest

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... l polyphenol and flavonoid contents of Moringa oleifera leaf were 9.68 mg GAE/g DM and 19.8 mg QE/g DM, respectively. The IC50 value was used to evaluate free radical scavenging ability by DPPH assay. The extract sample from Moringa leaves by methanol solvent and Soxhlet extraction method reached the lowest IC 50 value at 0.537 mg/mL concentration.