Nutrition is a process of how food affects the body. Nutrition represents a summation of intake, absorption, storage and utilization of food by the tissues. It is the adequate provision of materials like vitamins, minerals, fiber, water and food components to cells and organisms to support life. Many common health problems can be prevented or alleviated with good nutrition.The roles that nutrition plays in general and oral health in particular are many and increasingly complex. It is often overlooked yet obvious fact that the health of the oral cavity and that of the total body are intimately interrelated.Dentistry today is changing to meet the needs of a changing population. Life expectancy continues to increase and the nature and demographics of oral disease are changing associated oral conditions such as coronal caries, root caries, periodontal caries, edentulism, cancer, acquired immune deficiency syndrome (AIDS) and oral infections, all have nutritional implications.