Energy metabolism refers to the biochemical processes that convert food into energy within the body. This involves breaking down nutrients, such as carbohydrates, fats, and proteins, to produce adenosine triphosphate (ATP), the primary energy currency of cells. These processes occur in various stages, including glycolysis, the citric acid cycle, and oxidative phosphorylation. The efficiency of energy metabolism is crucial for maintaining bodily functions, such as movement, growth, and repair. Factors like diet, exercise, and overall health can influence how effectively the body metabolizes energy. Proper energy metabolism supports optimal performance and well-being throughout life.