Which of the following minerals is a trace mineral?

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Multiple Choice

Which of the following minerals is a trace mineral?

Explanation:
Trace minerals are minerals needed in small amounts, typically less than 100 mg per day, and iron is a classic example. Although only a small daily amount is required, iron is essential for making hemoglobin, which carries oxygen in red blood cells. The other minerals shown are macrominerals, needed in larger amounts—for example, calcium supports bones and teeth, while sodium and potassium are crucial for fluid balance and nerve function. Because iron fits the definition of a trace mineral, it is the correct choice.

Trace minerals are minerals needed in small amounts, typically less than 100 mg per day, and iron is a classic example. Although only a small daily amount is required, iron is essential for making hemoglobin, which carries oxygen in red blood cells. The other minerals shown are macrominerals, needed in larger amounts—for example, calcium supports bones and teeth, while sodium and potassium are crucial for fluid balance and nerve function. Because iron fits the definition of a trace mineral, it is the correct choice.

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