DPPH radical has been widely used to test the free radical scavenging ability of various natural products and has been accepted as a model compound for free radicals originating in lipids. This test aims at measuring the capacity of the extracts to scavenge the stable radical DPPH formed in the solution by donation of hydrogen atom or an electron[28]. If the extracts have the capacity to scavenge the DPPH free radical, the initial blue/purple solution will change into yellow color due to the formation of diphenyl picryl hydrazine. The reaction is used as a measure of the ability of the extracts to scavenge any free radical. Since IC50 represents the concentration of the extract that is able to scavenge half of the DPPH free radical presents in the test solution, the lower this value is, the higher the antioxidant activity of the extract has[29].