Metabolism is how your body turns food and drink into energy for essential functions. Learn about the processes, conditions and factors that affect your metabolism and how to keep it healthy. Metabolism refers to cellular reactions that give your body energy. Learn more about how metabolism works and how to improve your metabolic rate. Metabolism refers to the whole sum of reactions that occur throughout the body within each cell and that provide the body with energy. This energy gets used for vital processes and the synthesis of new organic material. Every living organism uses its environment to survive by taking nutrients and substances as building blocks for movement, growth, development, and reproduction. All of these are mediated by enzymes, which are proteins with specialized functions in anabolism and catabolism ... Metabolism is the series of chemical reactions that sustain life in living organisms. Learn about the two types of metabolic processes, catabolism and anabolism, and how they relate to nutrition, energy and health.