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Vitamin D Binding Protein (DBP) – Serum Concentration

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

This test measures the level of vitamin D binding protein in your blood, which helps transport vitamin D and other substances in your body.

Quick summary

["Your doctor may check this protein if you have vitamin D-related concerns or certain health conditions."]

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

Key facts at a glance

LOINC
6012-9
Short code
vWF Ag PPP IA-aCnc
Synonyms
vWF Ag PPP IA-aCnc
Category
chemistry
Sample
plasma
Container
Lavender-top (EDTA) or Green-top (Heparin)
Units
N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
Method
ia
Specimen volume
5 mL
Stability
Room temperature: 4h, Refrigerated: 24h, Frozen: 7d
Hemolysis max
500
Lipemia max
1000
Icterus max
500
TAT
4–24 hours
Order
routine

Why This Test Matters

Vitamin D binding protein (DBP) plays a role in transporting vitamin D and other hormones in your bloodstream. While its primary function is related to vitamin D metabolism, abnormal levels may sometimes be linked to conditions affecting protein synthesis or kidney function.

What to Expect Before the Test

No special preparation is needed for this blood test. You may have a small needle inserted into your arm to draw a blood sample. If you’re nervous, let your healthcare provider know so they can help you relax.

Possible Causes for Testing

Your doctor might order this test if you have symptoms like fatigue, muscle weakness, or if they suspect conditions affecting protein levels, such as kidney disease or certain genetic disorders.

What the Results Mean

Results are typically reported as a concentration level of the protein in your blood. While reference ranges can vary by lab, your results will be compared to what’s expected for your age and health status. Your doctor will interpret these results in the context of your overall health.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

Clinical Significance

Short name

DBP Serum

Frequently asked questions

How long does it take to get my test results?
Results for this test are usually available within 1 to 3 business days, depending on your lab’s processing time. Your healthcare provider will contact you once they have the results.
Can I eat or drink before this test?
You can eat and drink normally before this test, as no special diet or fasting is required.
Will this test affect my medication?
This test itself does not interact with medications, but your doctor will consider your current treatments when reviewing the 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