Plants are known as the 'Treasure-houses' of phytochemicals that act as the most beneficial agents called 'Antioxidants'. Such powerful substances are applicable in phytoremediation and reducing of oxidative stress, thereby contributing to many health benefits. The deficient levels of antioxidants defence mechanisms is compensated from the plant sources, helping in prevention of diseases and delay in aging. This book, "Important Medicinal Plants with Rich Antioxidant Potential" reviews about the antioxidant role, and some of the medicinal plants from different parts of the world that would help the readers understand the antioxidant activity of such species.