Which of the following are classified as trace minerals?

• A. Sodium and Potassium
• B. Boron and Molybdenum
• C. Calcium and Phosphorus
• D. Chromium and Fluoride

Answer: (B)

Trace minerals are the nutrients the body needs in small amounts, far less than the minerals categorized as macrominerals. Macrominerals like sodium and potassium are required in larger amounts and support functions such as fluid balance and nerve impulses, while calcium and phosphorus are key for bone structure and metabolic processes.

Boron and molybdenum are classic examples of trace minerals. They’re needed in very small amounts, but they serve important roles as cofactors for enzymes and in various metabolic reactions. That combination of being essential yet required only in tiny quantities makes them fit the category of trace minerals.

The other options contain minerals that the body typically uses in larger amounts (sodium, potassium, calcium, phosphorus), so they’re not trace minerals. Chromium and fluoride are also trace minerals in many sources, but the pairing shown here aligns with boron and molybdenum as the intended example for this item.