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Vitamin D Binding Protein (DBP) – Serum 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 hormones. It can be part of broader evaluations for vitamin D status or metabolic health.

Quick summary

["Your DBP levels may affect how vitamin D and other hormones work in your body."]

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

Key facts at a glance

LOINC
94830-7
Short code
EBV DNA Amn NAA+probe-Log#
Synonyms
EBV DNA Amn NAA+probe-Log#
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 order this test if you have symptoms like fatigue, bone pain, or muscle weakness, or if they suspect vitamin D deficiency, kidney disease, or other metabolic conditions. It may also be used alongside other tests to assess how well your body processes certain hormones.

What to Expect Before the Test

No special preparation is usually needed. You may fast for 8–12 hours before the test if instructed, but your provider will confirm. Bring any medications you’re taking, as some may affect results.

What the Test Involves

A blood sample will be drawn from a vein in your arm by a healthcare professional. The sample is sent to a lab for analysis.

What the Results Mean

Results help determine if your body’s hormone transport system is functioning normally. High or low levels may indicate conditions like kidney disease, liver issues, or vitamin D metabolism problems.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

◆Associated findings1

Short name

DBP Level

Frequently asked questions

What causes DBP levels to change?
DBP levels can be influenced by kidney function, liver health, and certain medications (e.g., steroids). Conditions like nephrotic syndrome or genetic disorders (e.g., familial dysalbuminemic hyperthyroxinemia) may also alter DBP concentrations.
How long does it take to get results?
Results are typically available within 1–3 business days, depending on your lab’s processing time. Follow-up with your provider to discuss findings.
Can diet affect DBP levels?
Dietary factors like vitamin D intake or protein-rich foods may indirectly influence DBP indirectly, but DBP itself is not directly affected by diet. Stick to your provider’s instructions for fasting or dietary restrictions if applicable.
  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