A simple blood test that checks your magnesium, a mineral that supports muscles, nerves, and heart rhythm.
Magnesium is a mineral involved in hundreds of reactions in the body, from making energy to building proteins and keeping nerves and muscles working smoothly. It also supports a steady heartbeat and healthy bones.
Most magnesium is stored in bone and inside cells, so the small amount measured in blood does not always reflect total body stores. Even so, a blood test is a useful first look.
A magnesium test can flag a deficiency that might otherwise be missed. Low magnesium is common and can come from poor intake, alcohol use, certain medications such as proton pump inhibitors, or gut conditions that reduce absorption. It can cause cramps, tiredness, and irregular heartbeat, and can make low potassium and calcium harder to correct.
High magnesium is uncommon and usually linked to reduced kidney function or magnesium-containing supplements and antacids.
Aniva reads your result against research-backed ranges, not just the lab's wide normal. The reference shown below is specific to this biomarker.
Ranges are guidance and vary by laboratory and method.
| Group | Reference range (SI) |
|---|---|
| Adults | 0.75 to 1.0 mmol/L |
Aligned to German laboratory practice (DGKL). Always interpret against your own lab's range.
Blood levels can look normal even when body stores are low, because most magnesium sits inside cells and bone. Haemolysis releases magnesium and can raise the reading. Magnesium-containing antacids and laxatives, and reduced kidney function, affect true levels.
Often read together with potassium and calcium, since low magnesium can keep those levels low.
What does a magnesium result mean? It shows the amount of magnesium circulating in your blood. Your clinician considers symptoms, trends, and related tests for context.
Do I need to fast for this test? No. Try to avoid magnesium supplements the day before unless your clinician advises otherwise.
What can affect my level? Supplements, antacids or laxatives with magnesium, diuretics, acid-reducing medicines, dehydration, alcohol, recent IV fluids, and hard exercise can shift results.
How often should I test? As advised by your clinician. Many people recheck after changing medicines, diet, or supplements, or if symptoms continue.
How long do results take? Results are usually ready in about 7 days.
What should I discuss with my clinician? Review your symptoms, all medicines and supplements, kidney health, and whether to repeat the test or check related electrolytes.
One annual membership, 100+ biomarkers, every result explained in plain language with a personalized action plan and concierge guidance.
