Protective effects of the crude extracts from yam (Dioscorea alata) peel on tert-butylhydroperoxide-induced oxidative stress in mouse liver cells

► Yam peel shows antioxidant activity in mouse liver cell lines. ► Yam peel water extract increases oxidant-induced cytotoxicity in mouse Hepa 1-6 cells. ► Yam peel ethanol extract reduces oxidant-induced cytotoxicity in mouse FL83B cells. ► GPx activity plays important role on reducing t-BHP-induced oxidative stress.