8-Hydroxydeoxyguanosine (8OHdG) is a modified base that occurs in DNA due to attack by hydroxyl radicals that are formed as byproducts and intermediates of aerobic metabolism and during oxidative stress.There is increasing evidence to support the involvement of free radical reactions in the damage of biomolecules that eventually lead to several diseases in humans such as atherosclerosis cerebral and heart ischemia-reperfusion injury cancer rheumatoid arthritis inflammation diabetes aging and neurodegenerative conditions such as Alzheimer’s disease.