Besides immune system support, what specific role does Vitamin C play in nutrient absorption from plant foods?

It helps absorb non-heme iron from plant sources

Vitamin C provides a valuable synergistic benefit when consuming plant-based meals, particularly those rich in iron derived from vegetables or legumes. This nutrient actively assists the body in the process of absorbing non-heme iron, which is the form of iron found exclusively in plant materials and generally less readily absorbed than heme iron from animal sources. When bell peppers are paired alongside iron-rich foods such as dark leafy greens or various legumes, the Vitamin C content acts as a booster, ensuring that a greater proportion of the available iron is successfully utilized by the body. This synergy is a key nutritional advantage when building vegetarian or vegan meals.