Final answer:
Factors such as achlorhydria, administration of alkali, and copper deficiency can cause falsely decreased iron levels by interfering with iron absorption. Diets high in phytate, phosphates, or oxalic acid also decrease iron absorption by forming compounds with iron that are not bioavailable.
Step-by-step explanation:
What types of interferences will cause a falsely decreased iron level? When considering iron levels within the body, several factors can lead to a falsely decreased measurement. Achlorhydria, or reduced stomach acid, can interfere with iron absorption, as can the administration of alkali. Similarly, copper deficiency is known to decrease iron absorption, as adequate copper is required for certain enzymes that mobilize iron for metabolic use. Nutritional elements can also play a significant role; for example, a diet high in phytate, phosphates, or oxalic acid can lead to the formation of compounds with iron that the body cannot absorb. Furthermore, iron overload can impact how the body manages iron, though this would typically lead to increased, not decreased, measures of iron. It is essential to consider these factors when evaluating iron levels to avoid mistreating an individual based on an inaccurate reading.