{"id":"magnesium","name":"Magnesium","shortName":"Magnesium","aliases":["Magnesium","Magnesium, Serum","Serum Magnesium","Magnesium, Plasma","Mg, Serum","Magnesium Level","Magnesium (Mg)","Mg","Magnesio","Magnésio","Magnésium"],"abbreviations":["Mg"],"loinc":[{"code":"19123-9","primary":true},{"code":"2601-3","primary":false}],"specimen":"serum-or-plasma","units":[{"ucum":"mg/dL","display":"mg/dL"},{"ucum":"mmol/L","display":"mmol/L"},{"ucum":"meq/L","display":"mEq/L"}],"referenceRanges":[{"population":"18+","low":1.7,"high":2.3,"unit":"mg/dL","unitDisplay":"mg/dL","note":"Mayo Clinic Laboratories prints 1.7–2.3 mg/dL (about 0.70–0.95 mmol/L) for adults over 17, with no sex split. A Labcorp sample report prints 1.6–2.3 mg/dL, so the low end differs by lab. Use the range printed on your own report first.","sources":[{"title":"Magnesium, Serum (test ID MGS)","url":"https://schnecklab.testcatalog.org/show/MGS","publisher":"Mayo Clinic Laboratories (catalog copy hosted by Schneck Medical Center)"},{"title":"Magnesium (test 001537), sample patient report","url":"https://files.labcorp.com/testmenu-d8/sample_reports/001537.pdf","publisher":"Labcorp","year":2018}]}],"review":{"status":"ai-verified","label":"AI-verified against cited sources. Awaiting expert review","lastReviewed":"2026-10-03"},"summary":"Magnesium is a mineral your muscles, nerves and heart need. A blood test shows only a small part of your body's total supply.","url":"https://bloodtesttracker.com/markers/magnesium","notice":"Information, not medical advice. Ranges differ between labs, so the range on your own report is the one your result is judged against."}