magnesium
ElectrolyteBlood sampleResults 24 hrsNo fasting
Magnesium
Magnesium is a mineral that supports muscle and nerve function, heart rhythm, and bone health. This test checks your blood magnesium level, which can be affected by diet, kidney function, and certain medications.
Sample
Blood
Results
24 hrs
Fasting
Not required
Follow-up
Optional add-on
What this test detects
Magnesium
Enzymatic colorimetry · serum
Quantitative · mg/dL
When to get this test
Muscle and nerve symptoms
Helps evaluate symptoms like cramps, weakness, or irregular heartbeat that may relate to magnesium imbalance.
Kidney and digestive health
Kidney problems and poor absorption can affect magnesium, so this test supports their evaluation.
Electrolyte assessment
Often checked alongside calcium and potassium for a fuller mineral picture.
How to prepare
01
No special preparation needed.
Common questions
Why would magnesium be low?
Low magnesium can result from poor intake, digestive issues, certain medications, or excess loss through the kidneys. Symptoms may include cramps and fatigue.
Is magnesium linked to other minerals?
Yes, magnesium interacts closely with calcium and potassium. Low magnesium can sometimes make it harder to correct those other minerals.