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Vitamin D Binding Protein (DBP) in Serum

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

This test measures the level of Vitamin D Binding Protein, a protein in your blood that helps transport vitamin D and other fat-soluble vitamins.

Quick summary

["Understanding your DBP levels can help assess vitamin D metabolism and related health risks."]

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

Key facts at a glance

LOINC
31895-6
Short code
MuV Ag Skin Ql
Synonyms
MuV Ag Skin Ql
Category
chemistry
Sample
serum
Container
Red-top tube (SST)
Units
N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
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 Might This Test Be Ordered?

Your healthcare provider may order this test if you have symptoms of vitamin D deficiency, kidney disease, or if you’re being evaluated for conditions like hypophosphatasia or certain metabolic disorders. It may also be used in research or specialized clinical settings to monitor vitamin D binding dynamics.

What Does This Test Involve?

A blood sample is drawn from a vein in your arm. The blood is processed to separate the serum (liquid part without clots) for testing. The test measures the concentration of Vitamin D Binding Protein in your serum using a specialized immunoassay method.

What Are Common Uses?

While Vitamin D Binding Protein itself isn’t as commonly used as vitamin D or calcium tests, it can be part of broader evaluations for vitamin metabolism disorders, kidney function, or genetic testing for conditions affecting protein function.

How Is the Result Interpreted?

Results are typically reported as a concentration value (e.g., grams per liter). Interpretation depends on clinical context, including other lab results, symptoms, and medical history. Your doctor will discuss what the result means for your specific situation.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

Clinical Significance:

Short name

Vitamin D Binding Protein

Frequently asked questions

How long does it take to get results from this test?
Results for this test are usually available within 1 to 3 business days, depending on lab processing times and your healthcare provider’s workflow. Follow-up instructions may vary, so check with your provider for details.
Can I prepare for this test in any special way?
No special preparation is needed for this blood test. You may have fasting requirements for other tests, but this one does not. Wear comfortable clothing if you need an arm raised for the blood draw.
What are the possible side effects of this blood test?
Most people experience only minor discomfort or bruising at the injection site. Rarely, there may be slight swelling or pain. If you experience excessive bleeding, dizziness, or signs of infection (like redness or fever), contact your healthcare provider immediately.
  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