Fig. 6

DPPH radical scavenging activity of Moringa oleifera leaf from the 21 locations. The results are mean of triplicates of three different concentrations (50 μg/mL, 250 μg/mL and 500 μg/mL) with the error bars (standard deviation). The chart shows significant between- and within-group differences in the DPPH content of the samples from the locations. Vitamin C, the standard used had higher scavenging activity than all the samples