Which mineral is crucial for oxygen transport in the blood?

The mineral that is crucial for oxygen transport in the blood is iron. Iron is a key component of hemoglobin, the protein found in red blood cells responsible for carrying oxygen from the lungs to the rest of the body. Each hemoglobin molecule can bind up to four oxygen molecules, allowing for efficient oxygen delivery to tissues and organs. Without adequate iron, the body cannot produce enough healthy red blood cells, leading to anemia and reduced oxygen-carrying capacity.

The other minerals mentioned have important roles in the body but do not have a direct involvement in oxygen transport. Calcium is essential for bone health and muscle function; magnesium plays a role in numerous biochemical reactions, including those in energy production and nerve function; and potassium is vital for maintaining fluid balance and proper muscle and nerve function. However, none of these minerals are directly involved in the transport of oxygen in the bloodstream like iron.