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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 molecules. It may be ordered to assess vitamin D metabolism or related conditions.

Quick summary

["Understanding your protein levels can help doctors evaluate how well your body processes essential nutrients."]

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

Key facts at a glance

LOINC
88905-5
Short code
FLUBV Ag Lower resp Ql IF
Synonyms
FLUBV Ag Lower resp Ql IF
Category
chemistry
Sample
serum
Container
Red-top tube (SST)
Units
N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
Method
if
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 recommend this test if you have symptoms or risk factors for conditions linked to vitamin D metabolism, such as kidney disease, liver disease, or certain genetic disorders. It could also be part of a broader evaluation for vitamin D deficiency or disorders of protein synthesis.

What to Expect Before the Test

No special preparation is usually needed, but you may be asked to fast for 8–12 hours before the draw if your blood is collected early in the morning. Wear a loose shirt for easy access to your arm.

What Happens During the Test

A healthcare professional will insert a small needle into a vein in your arm to draw blood. You may feel a slight pinch, but the process is quick. The blood sample is then sent to a lab for analysis.

What the Results Mean

Results are typically reported as a concentration of Vitamin D Binding Protein in the serum. While reference ranges vary by lab, elevated or low levels may indicate underlying health conditions that need further investigation.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

◆Associated findings1

Short name

DBP Serum

Frequently asked questions

How is Vitamin D Binding Protein related to my health?
Vitamin D Binding Protein helps transport vitamin D and other fat-soluble vitamins in your bloodstream. Abnormal levels may suggest issues like kidney disease, liver dysfunction, or genetic disorders affecting protein production. Your doctor will discuss how these results fit into your overall health picture.
What if my results are outside the normal range?
If your results are outside the expected range, your healthcare provider will review them with you and may order additional tests or ask for follow-up visits. This could include checking for conditions like vitamin D deficiency, kidney or liver problems, or hereditary disorders.
Can I affect my Vitamin D Binding Protein levels?
While Vitamin D Binding Protein levels are primarily influenced by genetic and metabolic factors, certain medications (like some steroids) or chronic illnesses may impact them. Your doctor will consider these factors when interpreting your results.
  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