Magnesium is an essential trace element. Deficiency leads to irritability, neuromuscular abnormalities, cardiac and renal damage. Its salts are used as antacids and cathartics. Excessive amount may cause CNS depression, loss of muscle tone, respiratory and cardiac arrest.

: https://testdirectory.questdiagnostics.com/test/test-detail/623/magnesium-rbc?p=r&cc=MASTER