Why is it commonly advised to take iron supplements with vitamin C?

• A. Vitamin C enhances iron absorption; avoid taking iron with calcium or antacids that reduce absorption; space dosing.
• B. Vitamin C blocks iron absorption.
• C. Vitamin C has no effect on iron absorption.
• D. Vitamin C increases iron excretion.

Answer: (A)

Vitamin C boosts iron absorption. It does this by converting iron to a form (ferrous, Fe2+) that the body can more readily absorb and by forming a soluble complex that stays available in the gut. This is especially helpful for non-heme iron found in many supplements. Because calcium and some antacids can reduce iron absorption by interfering with uptake or raising gut pH, taking iron with vitamin C and spacing it apart from calcium-containing products or antacids helps maximize absorption. A practical tip is to take the supplement with a vitamin C–rich beverage (like orange juice) or separate it by a few hours if needed.