vitamin d (serum)
NutritionBlood sampleResults 2-3 daysNo fasting
Vitamin D (Serum)
A blood test that measures 25-hydroxyvitamin D, the main form used to assess your overall vitamin D status. It helps check for vitamin D deficiency, which can affect bone and general health.
Sample
Blood
Results
2-3 days
Fasting
Not required
Follow-up
Optional add-on
What this test detects
25-hydroxyvitamin D (total)
ECLIA · serum
Quantitative · ng/mL
When to get this test
Checking vitamin D status
Identifies vitamin D deficiency or insufficiency that may affect bones and overall health.
Bone health concerns
Useful for people with bone pain, low bone density, or related conditions.
Monitoring supplementation
Tracks vitamin D levels in people taking supplements to ensure they reach a healthy range.
How to prepare
01
No special preparation needed.
02
Inform the lab if you are taking vitamin D or other supplements.
Common questions
How long do results take?
Results are typically ready within 2 to 3 days.
Do I need to fast?
No fasting is required for this test.
Who should consider this test?
It is helpful for people with limited sun exposure, bone health concerns, or symptoms that may relate to low vitamin D.