2. Nutrition – science of food, the nutrients & other subs.. Their action, interaction & balance in relation to health & disease. Process by which organisms.. Ingest, digest, absorb, transport, utilize & excrete. Health - state of complete physical, mental & social well being. Not merely the absence of disease / infirmity. Nutrition & wellness - Nutritional perspective. Dr.mervat salah.

3. Nutrition may be also defined as the science of food and its relationship to health. It is concerned primarily with the part played by nutrients in body growth, development and maintenance.

4. The word nutrient “food factor” is used for specific dietary constituents such as Proteins, fats, cho, vitamins minerals and water.