Why Stomach Acid Is Essential for Iron Absorption
Why Is Stomach Acid Essential for Iron Absorption?
Gastric acid plays a crucial role in iron absorption by converting dietary iron from the ferric (Fe3+) to the ferrous (Fe2+) form, which is the only form that can be absorbed by intestinal cells. This acid-dependent conversion is essential for absorbing iron from plant sources and iron-fortified foods, explaining why conditions that reduce gastric acid production can lead to iron deficiency despite adequate dietary intake.