Download App iOS Android


About the test
What is this test done for?
Magnesium blood test is used to evaluate the levels of magnesium in the blood.
Why is it Done?
The test helps to determine the abnormal levels of magnesium. Magnesium levels can be checked as a part of an evaluation of the severity of kidney problems and/or of uncontrolled diabetes. Low magnesium levels can cause persistently low calcium and potassium levels.
When should it be performed?

The test should be performed when the following conditions are seen:

  • Low levels of calcium and potassium
  • Muscle weakness
  • Twitching
  • Cramping
  • Confusion
  • Cardiac arrhythmias
  • Seizures
  • Malabsorption and malnutrition.
  • Diarrheas
  • Alcoholism
  • When a person is on medications that may affect the kidneys
  • Uncontrolled diabetes
  • Kidney disorders
How is it done
A blood sample will be collected from a vein in your arm. Fasting is required for this test.

The normal levels are 1.5 to 2.5 mEq/L.

If the levels are below 1.5mEq/L, it could mean:

  • low dietary intake
  • gastrointestinal disorders
  • uncontrolled diabetes
  • hypoparathyroidism
  • long term diuretic use
  • Toxemia of pregnancy
  • Second and third trimester of pregnancy

If the levels are high, it would be generally seen in:

  • Kidney failure
  • Hyperparathyroidism
  • Dehydration
  • Diabetic ketoacidosis
  • Addison’s disease
Other Tests
An electrolyte test can be ordered with magnesium to evaluate the overall electrolyte balance. Further, to check BUN, creatinine levels of renal function test to rule out kidney-related disorders.
Trusted Labs
Upto 75%
off on diagnostic tests
Free sample pickup