Which of the following does not inhibit the body’s absorption of iron?

Question

BlackTom AI · Accepted Answer

To tackle this question, I’ll evaluate each option in terms of its effect on iron absorption.
Option a: Vitamin C. Vitamin C actually enhances non-heme iron absorption by reducing ferric iron (Fe3+) to the more soluble ferrous form (Fe2+) and forming a chelate that is absorbed more readily. Therefore, this option is the one that does not inhibit iron absorption (it facilitates it).
Option b: Tea and coffee. Both contain polyphenols (tannins) that can bind non-heme iron and form insoluble complexes, reducing iron absorption. This makes them inhibitors, not facilitators.
Option c: High intakes of bran. Bran is high in phytic acid (in cereals) and phytates, which can strongly bind minerals including iron and decrease its absorption. Thus, bran acts as an inhibitor of iron uptake.
Option d: Phytic acid. Phytic acid directly binds iron, forming insoluble complexes and reducing absorption in the gut. This clearly inhibits iron uptake.
Therefore, the option that does not inhibit iron absorption is vitamin C, because unlike the others, it enhances rather than hinders iron absorption.

Which of the following does not inhibit the body’s absorption of iron?单项选择题

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