Cytoprotective effects of geraniin against peroxynitrite- and peroxyl radical-induced cell death via free radical scavenging activity

► Geraniin and its hydrolysed products exhibits potent antioxidant activity. ► Geraniin exhibits cytoprotective activity via its free radical scavenging activity. ► Geraniin exhibits protective activity in Hs68 cells, SH-SY5Y cells, and PC12 cells. ► Geraniin exhibits cytoprotective activity in the extracellular fluid.