Systemic magnesium pool (Mg pool)

The systemic magnesium pool represents the total amount of magnesium distributed throughout the human body, primarily stored in bone (50-60%) and soft tissues (40-50%), with less than 1% present in the blood (StatPearls, 2023). Magnesium is a critical divalent cation that serves as a cofactor for more than 300 enzymatic reactions, including those involved in protein synthesis, muscle and nerve function, blood glucose control, and blood pressure regulation (NIH ODS, 2022). It plays a vital role in the active transport of calcium and potassium ions across cell membranes, a process essential for nerve impulse conduction, muscle contraction, and normal heart rhythm (PubMed, PMC4455825). Deficiencies in the systemic magnesium pool, known as hypomagnesemia, are associated with various clinical conditions such as cardiovascular disease, type 2 diabetes, and osteoporosis (Journal of Clinical Medicine, 2015). Conversely, therapeutic intervention often involves the administration of magnesium salts to replenish these stores or to treat specific conditions like preeclampsia and certain cardiac arrhythmias (PubChem, 2024). Monitoring the systemic magnesium pool is challenging because serum levels do not always accurately reflect total body stores, necessitating the use of various clinical biomarkers (StatPearls, 2023).

Other names

Total body magnesiumMagnesium storesMagnesium homeostasisBody magnesium content

Therapeutic agents interact with the systemic magnesium pool primarily through direct supplementation to correct deficiencies or by altering the physiological handling of the ion. Magnesium salts (e.g., magnesium sulfate) increase the concentration of Mg2+ ions in the extracellular fluid, which then equilibrates with intracellular compartments to restore enzymatic activity and membrane stability (StatPearls, 2023). Conversely, certain drugs like diuretics or proton pump inhibitors can deplete the pool by increasing renal excretion or decreasing intestinal absorption, respectively (NIH ODS, 2022).