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Serum or Plasma Vitamin D Binding Protein (DBP) Concentration

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

This test measures the amount of vitamin D binding protein in your blood, which helps transport vitamin D and other related compounds. It may be ordered to assess vitamin D metabolism or related conditions.

Quick summary

["Your vitamin D binding protein levels can help doctors understand how your body processes vitamin D and other fat-soluble vitamins."]

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

Key facts at a glance

LOINC
109322-8
Short code
SNV IgM Msmt Ser
Synonyms
SNV IgM Msmt Ser
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 recommend this test if you have symptoms or risk factors for conditions linked to vitamin D binding protein, such as metabolic disorders, kidney disease, or genetic vitamin D metabolism issues. It could also be part of a broader evaluation for unexplained vitamin D-related problems.

What to Expect Before the Test

No special preparation is typically needed. You may be asked to fast for a few hours before your blood is drawn, but this depends on your provider’s instructions. Wear comfortable clothing and plan to rest after the draw.

How the Test Works

Blood is collected from a vein in your arm and sent to a lab. The lab uses an immunoassay method to detect and quantify the vitamin D binding protein in your serum or plasma.

What the Results Mean

Results are usually reported as a concentration value, but exact reference ranges can vary by lab. Your provider will interpret the results in the context of your overall health and symptoms. Abnormal levels may indicate issues with vitamin D metabolism or other underlying conditions.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

Clinical Significance

Short name

Vitamin D Binding Protein Level

Frequently asked questions

What could cause abnormal results?
Elevated levels might be seen in certain genetic conditions or during pregnancy, while low levels could suggest kidney disease, liver problems, or other metabolic disorders. Always discuss any concerns with your healthcare provider.
How often should I get this test?
This test is usually not routine unless you have specific symptoms or risk factors. Your provider will determine how often to repeat it based on your medical history and needs.
Does this test interact with other medications?
Generally, vitamin D binding protein levels are not directly affected by common medications, but some drugs (like certain steroids or diuretics) may influence vitamin D metabolism indirectly. Always inform your provider about all medications you take.
  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