Diagnostic test
25 - Hydroxy Vitamin D
About test
What does 25 - Hydroxy Vitamin D measure?
The 25-hydroxy vitamin D test measures the level of 25-hydroxyvitamin D in the blood, the main form used to assess vitamin D status. It may be ordered to help evaluate suspected vitamin D deficiency or excess, monitor vitamin D levels in people at risk of low levels, or support assessment of bone health and conditions affecting calcium metabolism. Results are interpreted along with symptoms, medical history, and other laboratory findings.
This overview is educational. Use the recorded preparation, sample and lab-partner details below for collection guidance, and confirm any missing information before collection.
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Sagepath Labs
- Sample for analysis
- Serum (1 mL)
- Report time
- 11:00/18:00
Preparation and specimen requirements can vary by test and laboratory. Follow the instructions shown for your selected partner and any advice from your healthcare professional.