Vitamin D
A vitamin D test measures the levels of vitamin D in your blood. Vitamin D helps your body absorb calcium to build healthy bones and teeth. It also helps keep your muscles, nerves, and immune system working normally. Having vitamin D deficiency (very low levels of vitamin D) can lead to bone disorders and other medical conditions.
A vitamin D test is used to check the levels of vitamin D in your blood. The test is usually done if your health care provider thinks that a bone or other health condition you have could be caused by very low vitamin D levels.
Source: MedlinePlus, U.S. National Library of MedicineNormal range
2 published ranges, each from a named source- Normal
- 30–100 ng/mL (varies by lab)ABIM 30–60 · LabCorp 30–100 ng/mL
These labs do not agree: the published adult ranges differ by up to 67%, so the same result can read as normal at one lab and be flagged at another — ABIM 30–60 · LabCorp 30–100 ng/mL. Both are real published values, shown as each lab states them.
Ranges from American Board of Internal Medicine (Laboratory Test Reference Ranges), LabCorp Test Directory.All source ranges (2)
| Source | Sex | Age | Range |
|---|---|---|---|
| American Board of Internal Medicine (Laboratory Test Reference Ranges) | All | all ages | 30–60 ng/mL |
| LabCorp Test Directory | All | all ages | 30–100 ng/mL |
- Sample
- Serum or plasma · LOINC
- Part of
- Bryan Johnson Blueprint · Calcidiol and Calciferol panel
- Listed under
- Parathyroid Disorders · Vitamin D
- Code
- LOINC 62292-8 · ng/mL
- Also known as
- 25-Hydroxyvitamin D3+25-Hydroxyvitamin D2, Ercalcidiol, Calciderol, Calcifediol