Vitamin D Binding Protein (DBP) – Serum
This test measures the level of a protein in your blood that helps transport vitamin D and other hormones. It can be part of a broader evaluation for vitamin D status or related metabolic conditions.
["Your doctor may check this protein level to assess how well your body processes certain vitamins and hormones."]
Key facts at a glance
- LOINC
- 69929-8
- Short code
- RSV IgA Ser Ql IA
- Synonyms
- RSV IgA Ser Ql IA
- 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
Why This Test Might Be Ordered
Your healthcare provider may recommend this test if they suspect vitamin D deficiency, kidney disease, or other conditions affecting hormone metabolism. It can also be used alongside vitamin D levels to better understand how your body is utilizing vitamin D.
What to Expect Before the Test
No special preparation is usually needed. You may be asked to fast for 8–12 hours before the test if your blood is drawn early in the morning. Wear a comfortable shirt for easy access to your arm.
What Happens During the Test
A healthcare professional will insert a small needle into your vein (usually in your arm) to draw blood. You may feel a slight pinch, but it usually doesn’t cause discomfort. The blood sample will be sent to a lab for analysis.
What the Results Mean
Results may help determine if your vitamin D levels are being effectively transported in your bloodstream. High or low levels could indicate underlying health concerns that need further evaluation.
Clinical interpretation
How abnormal results are interpreted and what conditions they suggest.
Clinical Significance: Vitamin D Binding Protein plays a role in transporting vitamin D and other fat-soluble hormones. Abnormal levels may suggest conditions like kidney disease, liver disorders, or metabolic imbalances. It can also be part of a broader assessment for vitamin D deficiency or related hormonal disorders.
Short name
Vitamin D Binding Protein
Frequently asked questions
What does a high or low Vitamin D Binding Protein level mean?
Does this test require fasting?
How long will I need to wait for my results?
Sources
- 1
- 2Lab Tests OnlineSource
- 3
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.
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