<prompt> The most suitable test to assess iron stores isSerum ironSerum ferritinTIBCTransferrin saturation  <response>: Reg Harrison 19 th ed pg 627,628 The serum ferritin level is a better indicator of iron overload than the marrow iron stain. However, in addition to storage iron, the marrow iron stain provides information about the effective delivery of iron to develop- ing erythroblasts. 