Which minerals are classified as trace minerals?

Trace minerals are essential minerals that the body requires in very small amounts to function properly. The correct answer accurately identifies iron, copper, and zinc as trace minerals, each of which plays critical roles in various physiological processes.

Iron is crucial for the formation of hemoglobin in red blood cells, which is necessary for oxygen transport throughout the body. Copper is involved in iron metabolism, the formation of connective tissue, and the functioning of the nervous system. Zinc plays a vital role in immune function, protein synthesis, and DNA synthesis.

In contrast, the other options either include minerals that are not classified as trace minerals or list them in a way that does not align with their classification. Calcium, potassium, and sodium, for example, are classified as major minerals rather than trace minerals, as they are required in larger quantities for functions such as bone health, fluid balance, and neuromuscular function. Similarly, magnesium is also considered a major mineral.

By focusing on the specific roles and requirements of iron, copper, and zinc, the correct response reinforces the understanding of the importance of trace minerals in nutrition and health.