The most potent phenolic antioxidant was obtained from the water extract of green and red lentil hulls (17.3 and 13.3 μM trolox/mg phenolics), followed by those extracted with ethanol (12.8 and 13.4 μM trolox/mg phenolics), acetone (11.5 and 11.9 μM trolox/mg phenolics), and hot water (10.4 and 10.7 μM trolox/mg phenolics).