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Vitamin D Binding Protein (DBP) – Serum Probe

Published: August 9, 2026Updated: August 16, 2026

This test measures the level of a protein in your blood that helps transport vitamin D. It may be used alongside other vitamin D assessments to evaluate vitamin D status.

Quick summary

["Your blood protein that carries vitamin D may be checked to help understand how well your body uses this essential nutrient."]

Medically reviewed by WellAlly Editorial TeamLast reviewed August 16, 2026Editorial policy

Key facts at a glance

LOINC
47002-1
Short code
VZV DNA # CSF NAA+probe
Synonyms
VZV DNA # CSF NAA+probe
Category
chemistry
Sample
csf
Container
Sterile tube
Units
N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
Method
probe-amp-tar
Specimen volume
1-2 mL
Stability
Immediate analysis required, Refrigerated: 1h
Hemolysis max
200
TAT
4–24 hours
Order
routine

Why This Test Might Be Ordered

Your healthcare provider may order this test if they suspect vitamin D deficiency, metabolic bone disease, or other conditions affecting vitamin D metabolism. It can also be part of a broader evaluation for kidney function or genetic disorders related to vitamin D binding.

What to Expect Before the Test

No special preparation is needed, but you may be asked to fast for 8–12 hours before the blood draw if your test is part of a larger metabolic study. Bring any medications you’re currently taking to your appointment.

How the Test Works

A small sample of your blood is taken from a vein, usually in your arm. The sample is then analyzed using a specialized probe to detect the protein’s presence and concentration.

What the Results Mean

Results alone may not provide a full picture of vitamin D status. They are often interpreted alongside other tests (like 25-hydroxy vitamin D levels) and clinical findings to assess overall health.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

◆Associated findings1

Short name

Vitamin D Binding Protein Level

Frequently asked questions

How long does it take to get my results?
Results are typically available within 1–3 business days, depending on your lab’s processing time. Your healthcare provider will contact you with the final report.
Can I eat or drink before this test?
No fasting is required for this test alone, but if it’s part of a metabolic panel, follow any fasting instructions provided by your provider.
Does this test replace a vitamin D blood test?
No, this test measures vitamin D binding protein specifically. It’s often used alongside other vitamin D-related tests (like 25-hydroxy vitamin D) to provide a more complete picture of your vitamin D status.
  1. 1
    MedlinePlus — Laboratory TestsSource
  2. 2
    Lab Tests OnlineSource
  3. 3
    Mayo Clinic — Tests & ProceduresSource

Click any link to access the full source. PubMed Central (PMC) links provide free full-text access.

This information is for educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment.

Medical Disclaimer

This content is for general informational and educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment. Always seek the guidance of a qualified healthcare provider with any questions you have about a medical condition, and never disregard professional medical advice or delay seeking it because of something you read here.

If you think you may have a medical emergency, call your local emergency number or go to the nearest emergency department immediately.

Medically reviewed by WellAlly Editorial Team Last reviewed August 16, 2026. · Read our editorial policy