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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, a protein in your blood that helps transport vitamin D and other fat-soluble compounds.

Quick summary

["Understanding your vitamin D binding protein levels can help assess how well your body processes certain nutrients."]

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

Key facts at a glance

LOINC
47315-7
Short code
FLUBV IgM Ser IA-aCnc
Synonyms
FLUBV IgM Ser IA-aCnc
Category
chemistry
Sample
serum
Container
Red-top tube (SST)
Units
N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
Method
ia
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 globulin protein found in blood plasma that binds and transports vitamin D, calcium, and other fat-soluble molecules. It plays a role in regulating their distribution and availability in the body.

Why Might This Test Be Ordered?

Doctors may order this test if you have symptoms or conditions linked to abnormal vitamin D metabolism, such as kidney disease, liver disease, or certain genetic disorders. It can also be part of broader evaluations for metabolic or endocrine disorders.

How Is the Test Performed?

A blood sample is drawn from a vein, typically in your arm. The sample is then processed to separate serum (the liquid part after clotting) for analysis. The test measures the concentration of DBP in your serum using a specialized immunoassay or similar method.

What Does the Result Mean?

Results are not typically provided as a single reference range since DBP levels can vary based on health status, genetics, and other factors. Your doctor will interpret the result in the context of your overall health and medical history.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

◆Associated findings1

Short name

DBP Serum

Frequently asked questions

How can I prepare for this test?
No special preparation is usually needed. However, avoid alcohol for 24 hours before the test, as it may affect blood chemistry. If you are on certain medications, inform your healthcare provider before the test.
Will I experience any discomfort?
You may feel a slight pinch when the needle is inserted, but the procedure is quick and typically well-tolerated. Most people experience minimal discomfort afterward.
How long will it take to get my results?
Results are usually available within 1 to 3 business days, depending on your lab’s processing time. Your doctor will discuss the findings with you during your follow-up visit.
  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