A simple blood test that checks your magnesium, a mineral that supports muscles, nerves, and heart rhythm.
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Clinicians order magnesium when you have muscle cramps, weakness, tingling, or an irregular heartbeat. It helps find low levels from poor intake, gut losses, or medicines like diuretics or acid-reducing drugs, and to monitor supplements. It is also checked when potassium or calcium are abnormal, or when kidney function changes. You can test this marker with Aniva across Germany and Finland.
Clinicians order magnesium when you have muscle cramps, weakness, tingling, or an irregular heartbeat. It helps find low levels from poor intake, gut losses, or medicines like diuretics or acid-reducing drugs, and to monitor supplements. It is also checked when potassium or calcium are abnormal, or when kidney function changes. You can test this marker with Aniva across Germany and Finland.
High: May relate to kidney issues, too much supplementation, magnesium-containing antacids or laxatives, dehydration, or certain medicines.
Low: May stem from low intake, long-term acid reducers, diuretics, alcohol use, diarrhea, or diabetes. If your result is outside the expected range, review supplements and medicines with your clinician and consider rechecking with related electrolytes.
Common factors that can affect results include recent magnesium supplements, antacids or laxatives, diuretics, acid-reducing medicines, dehydration, alcohol use, recent IV fluids, strenuous exercise, and sample hemolysis at draw. Levels can also shift with acute illness and after meals or supplements, so consistent timing helps.
Special situations include advanced kidney disease, pregnancy, or severe illness; confirm unexpected results with repeat testing and clinical review.
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? Most labs return results in 1–3 business 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.
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