Mitochondrial function refers to the role of mitochondria, often called the "powerhouses" of the cell. These tiny structures convert the food we eat into energy through a process called cellular respiration. This energy, stored in a molecule called ATP, is essential for various cellular activities, helping our bodies perform tasks like movement, growth, and repair. In addition to energy production, mitochondria are involved in other important functions, such as regulating metabolism and controlling cell death. They also play a role in producing reactive oxygen species, which can signal the cell to adapt to changes. Proper mitochondrial function is crucial for overall health and well-being.