Final answer:
Spinach is a good source of dietary iron for clients with iron deficiency anemia. Vitamin C enhances iron absorption, and certain cereals and bread are fortified with iron, though some individuals may have absorption issues.
Step-by-step explanation:
The nurse instructs the client that a good dietary source of iron for a client diagnosed with iron deficiency anemia is spinach. Foods like red meat, legumes, and spinach are excellent sources of iron, which is critical in preventing and treating anemia. Consuming vitamin C-rich foods, such as citrus fruits, alongside iron-containing foods, enhances the absorption of iron from the intestine.
It's important to note that while fortified foods such as certain breakfast cereals and white bread are enriched with iron, some individuals may still experience a lack of absorption due to malabsorptive syndromes. Additionally, the balance of nutrients, like ensuring not too much calcium which can interfere with iron absorption, is crucial for proper dietary health.