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Vitamin D binding protein (DBP) concentration, serum/plasma

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

This test measures the amount of vitamin D binding protein in your blood, which helps transport vitamin D and other hormones. It may be used alongside vitamin D testing to assess vitamin D status.

Quick summary

["Understanding your vitamin D binding protein levels can help doctors evaluate how well your body processes vitamin D and other important substances."]

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

Key facts at a glance

LOINC
94827-3
Short code
EBV DNA Amn Ql NAA+probe
Synonyms
EBV DNA Amn Ql NAA+probe
Category
chemistry
Sample
fluid
Container
Sterile tube
Units
N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
Method
probe-amp-tar
Specimen volume
2-5 mL
Stability
Room temperature: 2h, Refrigerated: 24h
Hemolysis max
300
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, kidney disease, or other conditions affecting protein function. It can also be part of a broader evaluation for metabolic or hormonal imbalances.

What to Expect Before the Test

No special preparation is needed for this blood test. You may have fasting instructions depending on your doctor’s protocol, but generally, you can eat and drink as usual unless advised otherwise. Bring any medications you’re currently taking to your appointment.

What Happens During the Test

A healthcare professional will draw blood from a vein in your arm. You may feel a slight pinch, but it usually doesn’t cause discomfort. The blood sample will be sent to a lab for analysis.

What the Results Mean

Results are typically reported as a concentration value (e.g., grams per liter). While reference ranges vary by lab, lower-than-expected levels may indicate kidney issues or other conditions affecting protein metabolism. Higher-than-expected levels could suggest liver disease or other factors.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

◆Associated findings1

Short name

DBP Level

Frequently asked questions

How long does it take to get my results?
Results are usually available within 1 to 3 business days, depending on your lab and healthcare provider’s workflow. Your doctor will contact you directly with the results once they are ready.
Can I eat or drink anything before this test?
Most likely, you can eat and drink normally unless your doctor specifies otherwise. Always follow their instructions, as some tests require fasting. If you’re unsure, ask your provider before your appointment.
What conditions might affect my DBP test results?
Several factors could influence your results, including kidney disease, liver disease, pregnancy, or certain medications. If you have a history of these conditions or are taking medications, let your doctor know to ensure accurate interpretation of your results.
  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