ROS (Reactive oxygen species) and RNS (Reactive nitrogen species) production is an unavoidable process in any living body. However, imbalance between ROS and RNS production and actions of antioxidants cause oxidative stress and many dangerous diseases. Consumption of fruits and vegetables rich in natural antioxidants (phenolic compounds, vitamin E, vitamin C and carrotenoids) can help prevent the oxidative stress. The action mechanisms of these natural antioxidants are presented in this paper
