**7. Conclusion**

It is concluded that functional food prepared by a conventional or modified procedure, has a functional role in human health. Some natural foods like plantbased food including fruits, vegetable, nuts, herbs, cereals and beans, seafood for example fish, and dairy product like milk are rich sources of vitamins, minerals, antioxidants, fiber, phenolic compound and omega-3 fatty acid, these all components have kept the specific functional role in human health against diseases. Conclusively statement shows that functional foods are designed to improve health and chronic diseases.
