Diabetes mellitus is a heterogeneous metabolic
disorder with different etiologies. It is characterized
by disarrangements in carbohydrates, proteins and fat
metabolism caused by the complete or relative deficit of
insulin secretion and /or insulin action. During diabetes
mellitus stable hyperglycemia causes an increased
production of free radicals via autoxidation of glucose
and non enzymatic protein glycation, which leads to the
disruption of cellular functions and oxidative damage to the
membranes. Oxidative stress is defined as the disturbance
in the balance of homeostatic rate between the production
of reactive oxygen species (free radicals) and antioxidant
defense mechanism, which may lead to tissue injury[1]. Free
radicals play an important role in causation of diabetes.
Antioxidants are the molecules wrestle against free radicals
such as superoxide, hydroxyl radicals, peroxyl radicals,