Which nutrient enhances iron absorption when consumed with iron-rich foods?

• A. Vitamin C
• B. Vitamin D
• C. Calcium
• D. Vitamin B12

Answer: (A)

The key idea is that vitamin C boosts the absorption of non-heme iron, which is the form found in plant foods and fortified products. Ascorbic acid lowers ferric iron (Fe3+) to ferrous iron (Fe2+) and forms a soluble complex that stays available for absorption in the small intestine, especially in the duodenum. This helps iron from plant sources be taken up more efficiently, improving overall iron status when these foods are eaten together with vitamin C–rich foods like citrus fruits, peppers, or strawberries.

Vitamin D doesn’t directly affect iron absorption; calcium can actually reduce non-heme iron absorption when consumed together; vitamin B12 doesn’t influence iron uptake.