Which nutrient can be increased by consuming orange juice along with iron-rich foods?

Orange juice is well known for its high vitamin C content, which plays a significant role in enhancing iron absorption. When consumed alongside iron-rich foods, vitamin C helps to convert ferric iron (the form of iron found in plant-based foods) into ferrous iron, which is more easily absorbed by the body. This synergistic effect of vitamin C is particularly beneficial for individuals who rely on non-heme iron sources, such as those found in vegetables, grains, and legumes.

The other options do not directly relate to the enhancement of iron absorption in the context provided. Fiber is important for digestive health, calcium is crucial for bone health, and potassium aids in maintaining fluid balance and muscle function, but none of these nutrients work specifically to increase iron absorption like vitamin C does. Thus, consuming orange juice alongside iron-rich foods effectively boosts the body’s iron uptake due to the presence of vitamin C.