Iron plays several pivotal roles in energy metabolism. It is essential for the synthesis of hemoglobin, the protein in red blood cells that transports oxygen to tissues, facilitating aerobic metabolism. Adequate oxygen delivery enables efficient energy production during physical activities. Iron also contributes to the functioning of enzymes involved in the conversion of energy substrates, such as carbohydrates and fats, into usable energy. Deficiency in iron can lead to fatigue and decreased exercise performance, emphasizing the importance of maintaining healthy iron levels through diet or supplementation.