An essential mineral for muscle, nerve, and energy function.
Magnesium is a mineral involved in hundreds of enzyme reactions, including energy production, muscle and nerve function, and keeping the heart rhythm steady. Most magnesium is inside cells and bone, with a small fraction circulating in the blood.
This test measures magnesium in serum. The value reflects magnesium in the extracellular fluid, the compartment outside your cells, which is the standard way to assess magnesium status even though it is only part of the body's total store.
Magnesium helps regulate muscle, nerve and heart activity and supports normal blood pressure and blood sugar. Measuring it can reveal deficiency, which is common and easy to miss.
A low level can cause muscle cramps, tiredness and irregular heartbeat, and often goes with low potassium or calcium. A high level is less common and usually relates to reduced kidney function or magnesium-containing supplements.
Aniva reads your result against research-backed ranges, not just the lab's wide normal. The reference shown below is specific to this biomarker.
| Measure | Adult range (SI) |
|---|---|
| Magnesium, serum | 0.70 to 1.00 mmol/L |
Ranges are guidance and vary by lab. Serum magnesium can stay normal despite low body stores, so interpret with symptoms.
Serum magnesium reflects only about one percent of body magnesium, so it can look normal in mild deficiency. Haemolysis falsely raises the value because red cells are magnesium-rich. Reduced kidney function, antacids, laxatives and proton pump inhibitors can shift results.
Read with potassium, calcium and kidney function (creatinine, eGFR).
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