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Vitamin D Binding Protein (DBP) – Serum Concentration

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

This test measures the amount of Vitamin D Binding Protein (DBP) in your blood serum. DBP helps transport vitamin D in your body.

Quick summary

["DBP levels may affect how well your body uses vitamin D."]

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

Key facts at a glance

LOINC
32843-5
Short code
EBV VCA IgG sp1 Ser-aCnc
Synonyms
EBV VCA IgG sp1 Ser-aCnc
Category
chemistry
Sample
serum
Container
Red-top tube (SST)
Units
N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
CPT
82784
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 Might Be Ordered

Your healthcare provider may check your DBP level if you have symptoms related to vitamin D metabolism, such as bone pain, muscle weakness, or if you’re being evaluated for conditions like hypovitaminosis D or kidney disease. It may also be part of a broader evaluation for genetic disorders affecting protein function.

What to Expect Before the Test

No special preparation is needed. You may have a small needle inserted into your arm to draw blood. If you’re on blood thinners, let your provider know before the test.

What the Results Mean

Results help assess how well your body is processing vitamin D and other substances that rely on DBP. Abnormal levels might indicate issues with protein function or vitamin D deficiency.

Common Conditions Linked to DBP

Changes in DBP levels can be associated with conditions like nephrotic syndrome (kidney disease causing protein loss), certain genetic disorders, or metabolic disorders affecting protein synthesis.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

◆Associated findings1

Short name

DBP Level

Frequently asked questions

What does a DBP test measure?
It measures the concentration of Vitamin D Binding Protein in your blood, which helps regulate how vitamin D and other hormones move through your body.
Can diet affect DBP levels?
Dietary factors like protein intake may indirectly influence DBP levels, but vitamin D binding protein itself isn’t directly affected by diet. Your provider may recommend dietary adjustments if vitamin D levels are low.
Is DBP testing common for vitamin D deficiency?
DBP testing is less commonly performed for vitamin D deficiency alone. Instead, it’s often checked alongside vitamin D levels or in patients with suspected kidney/liver disorders or genetic conditions affecting protein function.
  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