What's this test for?
Abnormal levels of magnesium are most frequently seen in conditions or diseases that cause impaired or excessive excretion of magnesium by the kidneys or that cause poor absorption in the intestines. Magnesium levels may be checked as part of an evaluation of the severity of kidney problems or of uncontrolled diabetes and may help in the diagnosis and monitoring of gastrointestinal disorders, sometimes characterised by prolonged diarrhoea. Since a low magnesium level can, over time, cause persistently low calcium and potassium levels, it may be checked to help diagnose problems with calcium, potassium, phosphorus, and/or parathyroid hormone (involved with calcium regulation).
Symptoms of magnesium deficiency can include: