Vitamin D, 25-Hydroxy Test
Your body's vitamin D status. Influenced by sun exposure, diet, supplements, and absorption.
What is Vitamin D, 25-Hydroxy?
Your body's vitamin D status. Influenced by sun exposure, diet, supplements, and absorption.
Find a Vitamin D, 25-Hydroxy test
We offer panels that include this marker. Browse to find the best fit.
Browse testsVitamin D, 25-Hydroxy Reference Range
These are the typical adult reference ranges used by major US labs. Your report will include the specific range used by the lab that processed your sample.
| Population | Range |
|---|---|
| age 18+ | 30.0 – 100 ng/mL |
Reference ranges are educational. Always interpret your result with the specific range printed on your lab report and discuss anything outside the range with a clinician.
What your Vitamin D, 25-Hydroxy result may mean
Usually reflects supplement intake. Very high levels (>100 ng/mL) can occur with over-supplementation.
Common in people with limited sun exposure, darker skin, obesity, or absorption issues. Supplementation is often used to correct it.
Educational only — not a diagnosis. Many factors can influence a single result. Discuss anything that concerns you with a healthcare provider.
Sources
Related Vitamins & Nutrients biomarkers
Markers commonly tested alongside Vitamin D, 25-Hydroxy.
Frequently asked
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