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Vitamin D Binding Protein (DBP) Mass Concentration, Serum

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

This test measures the amount of Vitamin D Binding Protein in your blood serum. It helps assess how well your body transports and regulates vitamin D.

Quick summary

["Your body’s vitamin D levels may depend on this protein’s role."]

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

Key facts at a glance

LOINC
7967-3
Short code
MuV IgM Ser-aCnc
Synonyms
MuV IgM 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

What Is Vitamin D Binding Protein?

Vitamin D Binding Protein (DBP) is a protein in your blood that carries vitamin D and other fat-soluble vitamins to different parts of your body. It helps maintain vitamin D balance and supports its function in bone health and immune regulation.

Why Might You Need This Test?

Your doctor may order this test if you have symptoms of vitamin D deficiency (like bone pain or fatigue), kidney disease, or if you’re being evaluated for conditions affecting vitamin D metabolism.

How Is the Test Performed?

A blood sample is drawn from a vein, usually in your arm. The serum portion is then analyzed to measure DBP levels using a specialized laboratory technique.

What Do Results Mean?

Results provide insight into your body’s ability to transport vitamin D, though they don’t directly indicate vitamin D status alone. Abnormal levels may prompt further testing for vitamin D deficiency or related conditions.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

Clinical Significance: DBP plays a critical role in vitamin D metabolism. Low levels may suggest kidney dysfunction or genetic disorders affecting protein synthesis, while high levels could indicate liver disease or other metabolic conditions.

Short name

DBP Serum

Frequently asked questions

Why was I asked to have this test?
Your doctor may have recommended it to evaluate how your body processes vitamin D, especially if you have symptoms like fatigue, bone pain, or if you’re at risk for kidney or liver conditions.
What are the typical reference ranges for this test?
Reference ranges vary by lab and may not be widely standardized. Your results will be compared to your own baseline or clinical context rather than a single universal range.
Does this test require fasting?
No fasting is typically required for this test, but follow your healthcare provider’s instructions for best accuracy.
  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