The most suitable test to assess iron stores is
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.
Serum iron
Serum ferritin
TIBC
Transferrin saturation
Haematology