Which mineral is essential for red blood cells carrying oxygen and energy metabolism?

• A. Iron
• B. Copper
• C. Zinc
• D. Selenium

Answer: (A)

Iron is the mineral that makes red blood cells able to carry oxygen and also supports energy production in cells. It’s a key part of hemoglobin, the protein in red blood cells that binds oxygen in the lungs and releases it to tissues throughout the body. Iron’s role doesn’t stop there—the same element is a crucial component of the mitochondrial enzymes that drive the electron transport chain, the process cells use to generate most of their ATP, the energy molecule. When iron is lacking, hemoglobin formation falters and oxygen delivery drops, leading to fatigue and weakness because tissues aren’t getting enough oxygen or energy. Copper, zinc, and selenium are important for other bodily functions, but they don’t directly enable red blood cells to transport oxygen or power energy metabolism in the way iron does.