This book entitled Functional Food and Human Health is an effort to bring together the new and merging aspect of alternative therapy by using the functional food to the main stream scientific discourse. Functional foods are defined as the items of regular diet and nutrition that go beyond the fulfilment of basic energy and nutritional requirement. By virtue of possessing bioactive molecules and compounds, the functional food promotes good health and prevents disease development. A number of such food items have been recognised to have the constituents that promote health and also found to be effective against many pathological conditions. Health-promoting biomolecules such as flavonoids, terpenoids, alkaloids and other phenolic compounds including curcumin, resveratrol and numerous others have been demonstrated to possess positive effects against several indications. These molecules have been demonstrated to exhibit anti-oxidant, anti-inflammatory, antibacterial, anticancer and other beneficial activities.