Phenolic compounds are basically involving plant metabolic system and widely spread throughout the plant kingdom. Phenolic compounds have potential against oxidative damages diseases, therefore play a protective role through ingestion of fruits and vegetables. These compounds are very much essential for the growth of plant and involve in reproduction process of plants. These compounds produced during the response process against pathogens for defending injured plants. Because of their antioxidant activities, they widely used in processed foods as a natural antioxidant.