Magnesium, Serum
Serum magnesium measures the amount of the mineral magnesium in your blood. Magnesium supports hundreds of processes, including nerve and muscle function, heart rhythm, and energy production.
Magnesium works closely with other electrolytes like potassium and calcium, so imbalances can affect them too. Its level offers insight into overall electrolyte and metabolic health.
A higher magnesium is uncommon and can relate to reduced kidney clearance or high intake from supplements or certain medications. Your clinician will consider your kidney function and what you're taking.
A lower magnesium can come from digestive losses, some medications, or poor absorption, and can sometimes contribute to low potassium or calcium; it's interpreted in context.
A typical range is roughly 1.7 to 2.2 mg/dL. Your clinician can explain your value.
Sources
Educational context only, not medical advice or a diagnosis. Reference ranges vary by lab, age and sex; always discuss your results with a clinician.
Associations to explore with a clinician, not a diagnosis from a single number.