Iron counterbalances which mineral?

• A. Copper
• B. Potassium
• C. Iron
• D. Magnesium

Answer: (A)

Copper helps regulate iron metabolism. The body uses ceruloplasmin, a copper-containing enzyme, to oxidize iron from the ferrous (Fe2+) to the ferric (Fe3+) state, which is necessary for iron to bind to transferrin and be transported to tissues such as the bone marrow for hemoglobin synthesis. When copper is insufficient, iron mobilization and utilization are impaired, so iron remains less available even if iron intake is adequate. This balancing role means copper supports iron's proper function in the body, which is why copper is the mineral that counterbalances iron. Potassium and magnesium don’t provide this specific support for iron transport, and iron itself can’t fulfill this role for iron metabolism.