NANP Board Practice Exam

Which one of the following would be considered a macro mineral?

1. Boron

2. Iron

3. Potassium

4. Zinc

The correct answer is: Potassium

Potassium is indeed classified as a macro mineral, essential for various bodily functions such as maintaining fluid balance, supporting nerve function, and regulating muscle contractions, including the heartbeat. Macro minerals are needed in larger amounts compared to trace minerals and play critical roles in sustaining health, with potassium being one of the most abundant minerals in the body. In contrast, the other minerals listed are categorized differently. Boron is typically regarded as a trace mineral, as it is required in much smaller amounts. Iron, while essential for health, is also considered a trace mineral despite its significant role in oxygen transport and cellular metabolism. Zinc, similar to iron and boron, is classified as a trace mineral, necessary for immune function, DNA synthesis, and wound healing but required in relatively low quantities. Thus, potassium stands out as the appropriate choice when identifying a macro mineral.