What is a Magnesium Test?
A magnesium test measures the level of magnesium in your blood. Magnesium is an essential mineral that plays a vital role in:
🦴 Bone health
⚡ Muscle & nerve function
❤️ Heart rhythm regulation
🧠 Energy production
Most magnesium is stored in bones and cells, with only a small amount circulating in the blood. This test helps detect magnesium imbalances that can affect overall health.
Normal Ranges of Magnesium
Magnesium Level
Range (mg/dL)
Interpretation
Low (Hypomagnesemia)
Less than 1.6 mg/dL
Deficiency, can cause muscle cramps, fatigue, and irregular heartbeat
Normal
1.6–2.6 mg/dL
Healthy magnesium levels
High (Hypermagnesemia)
Above 2.6 mg/dL
Excessive levels, may cause weakness, low blood pressure, or heart problems
(Ranges may vary slightly depending on the laboratory.)
Purpose of the Magnesium Test
Doctors recommend this test to:
✅ Evaluate magnesium deficiency or excess
✅ Monitor kidney function and electrolyte balance
✅ Diagnose muscle weakness, irregular heartbeat, or seizures
✅ Check for malabsorption disorders (e.g., Crohn’s disease, celiac disease)
✅ Monitor patients on diuretics or with chronic conditions
Symptoms of Magnesium Imbalance
⚠️ Low Magnesium (Deficiency) → Muscle cramps, fatigue, nausea, irregular heartbeat
⚠️ High Magnesium (Excess) → Weakness, confusion, slow heart rate, low blood pressure