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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 (DBP) in your blood. DBP helps transport vitamin D and other hormones in your body.

Quick summary

["DBP levels may be checked if you have vitamin D-related conditions or symptoms."]

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

Key facts at a glance

LOINC
108081-1
Short code
RUBV RNA Amn Ql NAA+probe
Synonyms
RUBV RNA 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 recommend this test if you have symptoms like bone pain, muscle weakness, or if they suspect vitamin D deficiency or related metabolic disorders. It could also be part of a broader evaluation for conditions affecting hormone transport or kidney function.

What to Expect Before the Test

No special preparation is usually needed. You may be asked to fast for a few hours before the blood draw, but this depends on your provider’s instructions. Bring any medications you’re currently taking.

What the Test Involves

A healthcare professional will draw blood from a vein in your arm. The process is quick and typically causes only minor discomfort. The blood sample will be sent to a lab for analysis.

What the Results Mean

Results are used to assess how well your body is transporting vitamin D and other hormones. Abnormal levels might indicate conditions affecting kidney function, hormone metabolism, or other systemic issues.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

Vitamin D Binding Protein (DBP) plays a critical role in transporting vitamin D and other steroid hormones in your bloodstream. Low levels may be linked to conditions like nephrotic syndrome (kidney disease), liver disorders, or certain genetic conditions. High levels could also be relevant in specific metabolic or hormonal evaluations.

Short name

DBP (Serum)

Frequently asked questions

What causes abnormal DBP levels?
Abnormal DBP levels can result from kidney disease, liver disease, or genetic disorders. Hormonal imbalances, certain medications, or metabolic conditions may also influence these levels. Always discuss your results with your healthcare provider.
How long does it take to get results?
Test results are typically available within 1 to 3 business days, depending on your lab’s processing time. Your healthcare provider will contact you once the results are ready.
Can lifestyle changes affect DBP levels?
While vitamin D Binding Protein itself isn’t directly affected by lifestyle changes like diet or exercise, conditions that influence kidney or liver function may be. If you suspect an underlying issue, talk to your provider about managing your health more broadly.
  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