Ace the Certified Dietary Manager (CDM) Exam 2026 – Fuel Your Future with Confidence!

The correct answer is based on the classification of minerals into major and trace minerals. Major minerals, often referred to as macro-minerals, are those that the body needs in larger amounts to maintain health and perform essential functions. Calcium, sodium, and phosphorus are all classified as major minerals because they play vital roles in bodily functions such as bone health, fluid balance, and energy production.

Iron, however, is classified as a trace mineral. While it is essential for health—mainly for the formation of hemoglobin and red blood cells—our bodies require it in smaller amounts compared to major minerals. Understanding this classification helps in comprehending the different roles minerals play in nutrition and health maintenance.