Figure 4.

Effect of methanol extracts of Moringa oleifera leaf powder on antioxidant enzyme activity. Cells were pretreated with moringa (5, 10 and 25 µg/ml) for 24 h before 100 µM H₂O₂ for 1 h. * p < 0.05 versus extract, ^# p < 0.05 versus H₂O_2.