Nutrition, is the biological process in which organisms assimilate food and fluids necessary for operation, growth and maintenance of its vital functions. Nutrition is also studying the relationship between food and health, especially in the determination of a diet. Although food and nutrition are often used interchangeably, are different terms as: Nutrition refers to the nutrient and food component comprises a set of phenomena that occur after unintentional ingestion of food, ie, digestion, absorption or passage of blood from the digestive tract of its components or nutrients, their metabolism or chemical transformations in cells and excretion or elimination of the organism. Nutrition is the science that examines the relationship between diet and health.Nutritionists are health professionals who specialize in this area of study, and are trained to provide dietary advice. The food includes a set of voluntary and conscious actions that are directed at the selection, preparation and ingestion of food, phenomena closely related to the sociocultural environment and economic (environment) and determine at least in large part, dietary habits and styles of life. Many common diseases and their symptoms can often be prevented or alleviated with good nutrition but things like eating fat, therefore, the science of nutrition attempts to understand how and what are the specific dietary aspects influence health. The purpose of nutrition science is to explain metabolic and physiological response of the body to the diet.With advances in molecular biology, biochemistry and genetics, nutrition science is further developed in the study of metabolism, which seeks to connect the diet and health through the lens of biochemical processes. The human body is made of chemical compounds such as water, amino acids (proteins), fatty acids (lipids), nucleic acids (DNA / RNA) and carbohydrates (eg sugars and fiber). Proper nutrition is one that covers: Energy requirements across the metabolism of nutrients like carbohydrates, proteins and fats. These energy requirements are related to basal metabolic expenditure, expenditure for physical activity and diet-induced spending. Micronutrient needs energy not as vitamins and minerals. Proper hydration based on the consumption of beverages, especially water. The adequate intake of dietary fiber. The dietary goals are represented by different graphic resources, one of them is the food pyramid. Maria Castillo CI: 17,874,402 Section: 4m11E.I Material Accessed: Encarta 2009

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