Source-backed patient guide
The 25-hydroxy vitamin D test measures the form most commonly used to assess vitamin D status.
These operational details come from the laboratory catalogue. Confirm current availability and preparation with the laboratory before collection.
Patient education
The 25-hydroxy vitamin D test measures the form most commonly used to assess vitamin D status.
It may be requested when a professional needs to investigate or monitor vitamin D status in the context of bone or other health concerns.
Preparation depends on the test and any other tests ordered at the same time. Follow the instructions from the requesting professional and laboratory, tell them about medicines and supplements, and do not stop medicines unless a qualified professional tells you to.
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