Cancer is a major public health burden in both developed and developing countries. One of the leading causes of death and globally the numbers of cases of cancer are increasing gradually. Cancer chemo-preventive agents, many of which are natural products, are capable of preventing or inhibiting the process of carcinogenesis.Plants, since ancient time, are using for health benefits by all cultures as well as source of medicines. Over the past decade, herbal medicines have become a topic of global importance, making an impact on both world health and international trade. Medicinal plants continue to play a central role in the healthcare system of large proportions of world’s population. This is particularly true in developing countries, where herbal medicine has a long and uninterrupted history of use. These plants may promote host resistance against infection by re-stabilizing body equilibrium and conditioning the body tissues. Several reports describe that the anticancer activity of medicinal plants is due to the presence of antioxidants in them, which are the natural sources of anticancer agents.
