What is one of the basic functions of proteins regarding energy?

Proteins serve multiple essential roles in the body, one of which includes their ability to provide energy. Under normal circumstances, carbohydrates and fats are the primary sources of energy for the body. However, when necessary, proteins can be converted into glucose through a process called gluconeogenesis. This conversion allows proteins to serve as an alternative energy source when carbohydrate intake is insufficient or during prolonged fasting and intense exercise.

While proteins are vital for many physiological functions, including the creation of hormones, enzymes, and antibodies, their role as an energy source is particularly significant during times of energy deficit. When the body needs energy and other sources are not available, it can break down amino acids—the building blocks of proteins—into energy. Thus, the function of proteins in energy production is a fundamental aspect of their role in nutrition and metabolism.