Final answer:
A healthcare provider should recommend Vitamin C supplements to increase dietary iron absorption in a child with iron-deficiency anemia, which can be complemented by iron-rich foods.
Step-by-step explanation:
To increase the absorption of dietary iron for a child with iron-deficiency anemia, the healthcare provider should recommend supplementing with Vitamin C. Vitamin C enhances the absorption of iron from the intestine and can be particularly effective when taken along with iron-rich foods. Good sources of dietary iron include shellfish, red meats, seeds, nuts, legumes, and fortified breakfast cereals. Ensuring an adequate intake of Vitamin C via citrus fruits, green vegetables, tomatoes, and other foods can be beneficial in improving iron levels in the child's body.