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25-Hydroxy Vitamin D (D2+D3 Fractionated) Blood Test
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| Feature |
Labcorp
|
Quest Diagnostics
|
|---|---|---|
| Price | $146.99 | Coming soon |
| Results in | ~6 business days | — |
| Sample type | Blood Serum | — |
| Require fasting | No | — |
About the test
This panel measures total 25-OH vitamin D, 25-OH vitamin D2, and 25-OH vitamin D3 to assess nutritional deficiencies and monitor nutrient supplementation.
Included biomarkers & Reference ranges
| Biomarker | Reference range |
|---|---|
| Vitamin D, 25-OH, Total The combined measure of both major forms of vitamin D (D2 and D3) in your blood — the standard test used to assess overall vitamin D status. | 30–100 ng/mL |
| 25-OH Vitamin D2 The form of vitamin D your body makes from plant-based (D2) supplements or fortified foods. Reflects how much vitamin D you're getting from these sources. | — |
| 25-OH Vitamin D3 The main form of vitamin D your body produces from sun exposure or gets from animal-based foods and supplements. Shows the D3 part only; overall vitamin D status is judged on total 25-OH vitamin D. | — |
Reference ranges vary by lab, age, and sex (M/F). Your report shows your exact range. Click any biomarker to see its optimal range and what your results mean.
Preparation
- Fasting for 8 hours before your blood draw is preferred but not required.
- Fasting before a blood draw means you don't eat or drink anything except water.
- Your doctor should provide any special instructions related to fasting for your test. Always follow your doctor's instructions.
How it works
- 1. Order online No referral or insurance
- 2. Get a requisition By email in 24–72 hours
- 3. Visit a draw center Bring a matching photo ID
- 4. Get results Securely by email
- These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease.
Consultations
Not sure how to read your results? We can help.
Schedule a consultation with a Hormunity specialist. We’ll walk through every marker, interpret what it means for you, and map out the next steps for your care.
Book a specialist