Which of the following is the single MOST sensitive status for evaluating body iron status?: (A) Serum transferrin saturation, (B) Serum ferritin, (C) Serum iron, (D) Hemoglobin concentration
Answer is B. The single most sensitive indicator of body iron status is serum ferritin level. Levels of < 10 mcg/ L indicates iron deficiency. Ref: Park 21st edition, page 576.