Which vitamin is known to aid in the regulation of iron absorption?

Vitamin C is known to aid in the regulation of iron absorption because it enhances the absorption of non-heme iron, the type of iron found in plant-based foods. When vitamin C is present in the digestive tract, it converts ferric iron (Fe3+) to ferrous iron (Fe2+), which is more soluble and readily absorbed by the intestinal lining. This interaction is particularly beneficial for individuals relying on plant sources of iron, which typically provide non-heme iron.

In contrast, folate and vitamin B12 primarily play roles in red blood cell formation and DNA synthesis, and thiamin is essential for energy metabolism. While these vitamins are crucial for overall health and function in various metabolic pathways, they do not have a direct impact on iron absorption as vitamin C does. Therefore, vitamin C stands out as the key nutrient in enhancing the bioavailability of iron in the diet.