Metabolism is a process within the human body that occurs as the food a person eats is converted into energy. Some people’s metabolisms operate more efficiently than other’s. Generally, you want the food that you eat to burn as energy instead of being stored as a fat cell. Some factors that help to regulate metabolism are beyond our control – such as age, genetics, and gender. However, other metabolic factors are within our control, such as muscle-to-fat ratio and the overall health of our bodies. The more muscle we have, the more calories we burn. The healthier we are, the more efficiently our bodies’ systems regulate – and metabolism is no exception.