QuestAssureD 25-Hydroxyvitamin D (D2, D3) Blood Test
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| Feature |
Labcorp
|
Quest Diagnostics
|
|---|---|---|
| Price | Coming soon | $28.49 |
| Results in | — | ~5 business days |
| Sample type | — | Blood Serum |
| Require fasting | — | No |
About the test
QuestAssureD™ 25-Hydroxyvitamin D Test - This test measures the levels of Vitamin D in the body, which is crucial for bone health. It checks for Vitamin D activity, except in cases of renal disease. Low levels might indicate a dietary deficiency, poor absorption, or liver issues, leading to bone diseases like rickets and osteomalacia. High levels could cause hypercalcemia. The test specifically measures the two common forms of Vitamin D: 25-OH D3 and 25-OH D2.
Who might consider it:
This test is suitable for individuals showing symptoms of Vitamin D deficiency or those at risk of bone diseases.
Symptoms of Vitamin D Deficiency:
- Bone pain and weakness
- Muscle weakness
- Mood changes, like depression
- Severe fatigue
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 Hydroxy Vitamin D (Cholecalciferol D3) The vitamin D3 portion of your 25-hydroxyvitamin D, coming from sunlight on your skin, animal foods and most supplements, used to assess vitamin D status. | — |
| 25-OH Hydroxy Vitamin D (Ergocalciferol D2) The vitamin D2 portion of your 25-hydroxyvitamin D, which comes mainly from plant-based sources and prescription or some over-the-counter supplements. | — |
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 recommended 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.
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.
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