Systemic iron pool

The systemic iron pool refers to the total amount of iron within the body, distributed across functional (hemoglobin), transport (transferrin), and storage (ferritin) compartments. Iron is a vital element for life, serving as a core component of heme for oxygen transport and as a cofactor for enzymes involved in DNA synthesis and mitochondrial respiration (NIH Office of Dietary Supplements, 2023). Systemic iron homeostasis is maintained by a complex regulatory network centered on the hormone hepcidin, which controls the entry of iron into the plasma from the diet and from recycling macrophages (Ganz, 2013). Pathological deviations in the systemic iron pool, such as iron deficiency anemia or iron overload syndromes like hemochromatosis, lead to significant systemic morbidity including fatigue, organ failure, and increased mortality (StatPearls, 2023). Pharmacological interventions directly target this pool through the administration of iron supplements to correct deficiencies or the use of chelating agents to sequester and excrete toxic iron levels (PubChem, 2024). Additionally, novel therapeutics are being developed to target the regulatory pathways, such as hepcidin mimetics, to indirectly manage the systemic iron balance in chronic diseases.

Other names

Total body ironCirculating ironPlasma iron poolIron storesLabile iron pool

Iron supplementation provides elemental iron to replenish depleted stores and support erythropoiesis; iron chelation therapy involves the binding of excess ferric and ferrous ions into stable, non-toxic complexes that are subsequently excreted via urine or bile; hepcidin modulation regulates the ferroportin-mediated efflux of iron into the systemic circulation.