Antioxidants play a major role in preventing oxidative stress which is responsible for cell damage and other fatal diseases. This book is a collective contribution of specialists and experts associated with the field of antioxidants and their applications. The chapters included herein aim to provide significant information on some of the major concepts and pharmaceutical applications of antioxidants such as, activity of antioxidant compounds and substances, extraction and production of antioxidants from different sources, etc. This book would prove to be an invaluable source of reference for students and professionals alike.