Vitamin D
What it measures
This measures 25-hydroxyvitamin D, the storage form of vitamin D your body uses to gauge how much you have available, important for bone health and several other functions.
Often reported in ng/mL. Reference ranges differ between laboratories, ages and sexes, so always compare with the range printed on your own report.
Why it matters
Vitamin D levels vary with sun exposure, diet, and supplement use, and low results are common and usually straightforward to address once identified.
Questions worth asking
- Would supplementation be a reasonable next step given this result?
- How much sun exposure or dietary vitamin D do I typically get?
- Is a follow-up test recommended after any changes?
Have a result for Vitamin D?
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Educational information only. Not a diagnosis, not treatment advice, and not a substitute for a licensed healthcare professional.