All tests & panels
High-Demand Tests
Vitamin D 25-Hydroxy Blood Test
An individual vitamin D (25-hydroxy) measurement.
Looking for multiple nutrient measurements? View the Comprehensive Vitamin Deficiency Panel.
Blood sampleNo Fasting1 Test Included
What’s Included
- Vitamin D, 25-hydroxy
1 test included · Result timing varies by test.
What It Measures
- Measures vitamin D 25-hydroxy as an individual marker.
- This is a single vitamin D measurement, not a multi-nutrient panel.
- Values are reported against the performing laboratory’s reference ranges.
Preparation
- No fasting is required for this collection.
- Drink water before your visit.
- Wear a short sleeve or loose sleeve.
- Bring a list of any medications and supplements you take.
Important Limitations
Reflects a single point of collection and can change over time.
A laboratory result is not, by itself, a diagnosis. A licensed physician or qualified healthcare professional should interpret your results in the context of your overall health.
Frequently Asked Questions
- How long do results take?
- Most routine results are available within 24–48 hours after the sample reaches the laboratory. Turnaround times vary by test and may be longer for specialized or send-out testing. Results are delivered by email.
- Do I need to fast?
- No. You can eat and drink normally before this collection.
- Where does the collection happen?
- A mobile phlebotomist draws your sample at your home, work, hotel or event. We serve the Dallas, Houston and San Antonio areas.
- Do I need a provider’s order?
- Some laboratory tests require an order from a licensed provider. If you do not have one, we will confirm this with you before your visit.
- Can you tell me what my results mean?
- No. We provide laboratory-testing access only. A licensed physician or qualified healthcare professional should interpret your results in the context of your overall health.