Excessive generation of reactive oxygen species (ROS), coupled
with a reduced availability of antioxidants, predisposes the cells to
a state of oxidative stress. ROS are highly reactive and unstable in
nature. Antioxidants present in oil inhibit oxidative deterioration in
vegetable oils during the frying process and scavenge free radicals and
ROS. Vegetable oils are thus important in the functional and sensory
aspect of food products. The oil acts as a medium for heat transfer and
as a carrier for the fat-soluble vitamins A, D, E, and K.