Nutrition is the process to consume food for health and growth of body. In this body maintain itself by transforming food into energy and body tissues. Food provides essential substance which is called nutrients. Body utilizes these nutrients for repair and maintenance of tissues and to keep its different systems working smoothly. Foods are the nourishing materials consisting of protein, carbohydrate and fat used for the body of an organism. It also provides mental nourishment. These are organic materials formed by plants which are used for growth and activities. Nutrition is process through which living organisms obtain food for their growth and development. The stages include ingestion, digestion, absorption, transport, assimilation and excretion. It is the process of nourishing by utilizing food materials. It is the nourishment of an organism for supporting its function with nutrients and best way to promote good health. It is also helpful for identifying the problems caused due to lack of nutrients prevention of diseases through healthy diet. Good Nutrition is well balanced diet combined with regular physical activity and poor nutrition can lead to reduced immunity, increase susceptibility to various diseases, causes impaired mental development and reduced productivity.