FPGEE for National Association of Boards of Pharmacy (NABP) Practice Exam 2025 - Free NABP Practice Questions and Study Guide

The human body typically contains about 3 to 4 grams of iron in an adult. This essential mineral is crucial for various bodily functions, particularly for the formation of hemoglobin, which is necessary for transporting oxygen in the blood. It is also a part of myoglobin, which helps supply oxygen to muscles, and a component of many enzymes involved in metabolism.

While the ranges provided in the options could suggest some variance, 4 grams is a commonly referenced estimate for the total iron content in an adult body, taking into account individual differences and physiological states. This amount reflects typical levels found in both men and women, although women may have slightly lower amounts due to menstruation and other factors.

The amounts cited in the other options are less commonly recognized and could indicate either very low or very high estimates that do not align with the standard biological understanding of iron content in adults. Understanding the average iron content can help in assessing nutritional needs and diagnosing iron deficiency or excess in clinical settings.