

Vitamin D (25-Hydroxy D2 & D3 Fractionated)
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25-Hydroxy Vitamin D is a crucial test to measure your body's overall vitamin D status. This comprehensive assay provides specific results for both 25-hydroxy vitamin D2 and 25-hydroxy vitamin D3, giving you a detailed understanding of your vitamin D levels. Vitamin D is essential for maintaining strong bones, regulating calcium and phosphate levels, and supporting immune system function. This test utilizes advanced Liquid Chromatography/Tandem Mass Spectrometry (LC/MS-MS) methodology for high accuracy.
Quick facts
Serum (preferred) or plasma
2–4 business days
No Fasting Required
Licensed physician review and requisition included with every test.

How It Works?

once Test Order is received, Our physicians will review your request and email you the easy-to-follow requisition form.

Find the closest partner location—most are within 2–3 miles—and drop by for a quick, no‑appointment blood draw.

Once your sample is processed, we’ll send your report straight to your inbox within 1–3 business days. Just click the link to view your results anytime.

Have Questions about results? Book a phone or video visit with one of our doctors. They’ll walk you through your report, explain any findings, and recommend next steps