What mineral is essential for the transport of oxygen in the body?

Iron is essential for the transport of oxygen in the body because it is a key component of hemoglobin, the protein found in red blood cells that binds to oxygen in the lungs and carries it to tissues throughout the body. Without adequate iron, the body cannot produce sufficient hemoglobin, leading to reduced oxygen transport and potential anemia, which can cause fatigue and other health issues. Iron's role in oxygen transport is fundamental to maintaining overall energy levels and proper cellular function, highlighting its importance in nutrition and health.

The other minerals listed, while important in various biochemical functions, do not play a direct role in the transport of oxygen in the body. Manganese is involved in bone formation and antioxidant defense, iodine is crucial for thyroid hormone production, and vanadium is less understood but thought to have roles in cellular metabolism, none of which directly concern oxygen transport like iron does.