Nail the Certified Nutrition Specialist (CNS) Exam 2025 – Fuel Up for a Health-Packed Future!

The interaction between iron and zinc is characterized by competition for absorption in the gastrointestinal tract. When zinc is present, it can inhibit iron absorption because both minerals use similar pathways and transport mechanisms to enter the bloodstream. This competitive interaction means that high levels of zinc, particularly from supplements or high dietary intake, can interfere with the absorption of iron, potentially leading to a situation where iron levels may be compromised.

Understanding this relationship is important in dietary planning, especially for individuals who may require increased iron or zinc intake, such as pregnant women or those with specific deficiencies. Careful consideration of the intake of these minerals can help avoid such absorption issues. In the context of supplementation, it is often recommended to space out the consumption of iron and zinc supplements to optimize absorption of both nutrients.