For general education only. This information does not diagnose a condition or replace medical advice. Your provider will determine which evaluation or treatment is appropriate for you.
What it measures
Most vitamin D blood tests measure 25 hydroxyvitamin D, a form used to assess vitamin D status.
Why it may be considered
A clinician may consider it when there is a specific concern about bone health, deficiency, or a relevant medical condition. Not everyone needs routine testing.
What affects interpretation
Sun exposure, diet, supplements, and health conditions can affect levels. Ask whether testing or supplementation is appropriate instead of aiming for a universal target.
Laboratory reference ranges depend on the test and laboratory. This glossary does not interpret your results or imply that Lola orders this test. Your provider will determine what is relevant to your care.
Questions to bring
- Why is this test relevant to my situation?
- Do I need to prepare or time the sample?
- How does this result fit with my symptoms and other findings?