Magnesium
A magnesium blood test measures the amount of magnesium in a sample of your blood. Magnesium is a mineral that you get from many kinds of foods you eat. Some examples include nuts, seeds, beans, fortified breakfast cereals, green leafy vegetables, and milk.
A magnesium blood test is used to check the level of magnesium in your blood.
Source: MedlinePlus, U.S. National Library of Medicine
Normal range
- ≤ 2 y
- 1.6–2.7 mg/dL
- 12 y – 17 y
- 1.6–2.3 mg/dL
- 17 y+
- 1.7–2.3 mg/dL
- 3 y – 5 y
- 1.6–2.6 mg/dL
- 6 y – 8 y
- 1.6–2.5 mg/dL
- 9 y – 11 y
- 1.6–2.4 mg/dL
- Normal
- 1.6–2.6 mg/dL
Ranges from American Board of Internal Medicine (Laboratory Test Reference Ranges), Mayo Clinic Laboratories (Pediatric Test Catalog), Mayo Clinic Laboratories (Test Catalog).
All 13 source ranges
What moves it
| Recommendation | When | Evidence | Source |
|---|---|---|---|
| Magnesium — address deficiency | Low | National Institutes of Health - Office of Dietary Supplements |
What an abnormal result can be associated with
- A high result
- Hypermagnesemia
- A low result
- Hypomagnesemia
Associations from LOINC2HPO (Human Phenotype Ontology). This is reference information, not a diagnosis — only a clinician can interpret your result in context.
Details
- Sample
- Serum or plasma · LOINC
- Collection
- Serum gel tube · 0.5 mL · Mayo Clinic Laboratories (Test Catalog)
- Part of
- Bryan Johnson Blueprint
- Listed under
- Fluid and Electrolyte Balance · High Blood Pressure in Pregnancy
- Code
- LOINC 19123-9 · mg/dL
- Also known as
- MAG, Magnes