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Vitamin D Binding Protein (DBP) Mass 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 in your body.

Quick summary

["Understanding your DBP levels can help assess how well your body is using vitamin D."]

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

Key facts at a glance

LOINC
1626-1
Short code
Vit A pre 5000 U SerPl-mCnc
Synonyms
Vit A pre 5000 U SerPl-mCnc
Category
chemistry
Sample
serum
Container
Red-top tube (SST)
Units
N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
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 order this test if you have symptoms related to vitamin D metabolism, such as bone pain, muscle weakness, or if you have conditions like kidney disease or certain genetic disorders that affect protein function.

What to Expect Before the Test

No special preparation is typically needed. You may be asked to fast for 8–12 hours before the test if blood is drawn from a vein, but if it’s a simple fingerstick, you can eat and drink normally.

What the Results Mean

Results are not provided as a single reference range since DBP levels can vary based on factors like age, sex, and health conditions. Your provider will interpret the result in relation to your overall health and symptoms.

Common Conditions Linked to DBP Levels

Changes in DBP levels may be linked to conditions affecting vitamin D metabolism, such as kidney disease, liver disease, or genetic disorders like hypophosphatasia. It can also be part of broader evaluations for vitamin D deficiency or excess.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

◆Associated findings1

Short name

DBP Level

Frequently asked questions

How often will I need this test?
The frequency depends on your health status and symptoms. If you have a chronic condition, your provider may recommend periodic testing to monitor changes. If you’re asymptomatic, testing may only be done if other signs suggest a need.
What if my results are outside the expected range?
If your results are abnormal, your provider will discuss potential causes with you, such as underlying health conditions or medication effects. They may recommend further testing or adjustments to your treatment plan.
Does diet affect this test?
Dietary factors like vitamin D intake (from food or supplements) can indirectly influence vitamin D metabolism, but DBP itself is a protein produced by the liver and kidneys. Your provider may advise on general dietary habits if related to your overall health evaluation.
  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