Vitamin D, 25-Hydroxy
The standard test for vitamin D status — measures active circulating 25-OH-D.
Blood drawAt-home kit1–2 business days
What this test measures
Measures 25-hydroxy vitamin D, the standard blood marker for vitamin D status.
Who should take this test
Anyone with fatigue, bone pain, frequent infections, limited sun exposure, or supplementing vitamin D.
Biomarkers included
Vitamin D, 25-Hydroxy
Preparation
No fasting required.
How it works
- 01. Order online — physician order included.
- 02. Receive the kit by mail; collect your sample at home.
- 03. Get results in 1–2 business days via secure portal.
Frequently asked questions
Optimal range?
Most labs flag 30–100 ng/mL as sufficient; many functional providers target 40–60.
Related tests
Medical disclaimer: This test is for informational and screening purposes only and is not a substitute for medical advice, diagnosis, or treatment. Results should be reviewed with a qualified healthcare provider.