Hypomagnesemia: A Clinical and Nutritional Update
Abstract
PURPOSE OF REVIEW: Hypomagnesemia, defined as low serum/plasma magnesium concentration, is a highly prevalent yet underrecognized electrolyte disorder with extensive clinical, metabolic, and nutritional implications. This review provides an updated synthesis of magnesium physiology, dietary determinants, homeostatic regulation, diagnostic challenges, and therapeutic strategies, with particular emphasis on recent meta-analyses and large-scale epidemiological evidence linking hypomagnesemia to multisystem disease. RECENT FINDINGS: Accumulating evidence has shown consistent associations between low serum or dietary magnesium and increased risk of cardiometabolic disorders (hypertension, type 2 diabetes mellitus, metabolic syndrome, and cardiovascular disease), neuropsychiatric conditions (migraine, depression, cognitive impairment, and dementia), osteoporosis, immune dysregulation, and adverse outcomes in hospitalized, critically ill, and chronic kidney disease patients. Mechanistic studies have clarified the roles of TRPM6/7 channels, tight junction claudins, and basolateral magnesium transporters in intestinal and renal magnesium handling, elucidating pathways underlying both inherited and acquired deficiencies. Research has also highlighted the contribution of modern dietary patterns, food processing, mineral-depleted drinking water, medication use (notably proton pump inhibitors, diuretics and chemotherapeutic agents), and gut microbiome alterations to widespread…
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