Antioxidant capacity of water and ethanol extracts are shown in Fig. 5a,b. Total antioxidant and ABTS antioxidant capacity were not significantly different when
concentrations of both water and ethanol extracts were increased from 25 to 100
l gmL1; however, antioxidant capacity significantly increased when extract concentrations exceeded 100 l gmL1. At concentrationsgreater than 100 lgmL
1, the papaya leaf ethanol extract demonstrated higher antioxidant capacity than
the water extract (Fig. 5a,b)