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Salivary Vitamin D Binding Protein (VDBP) Qualitative Probe

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

This test measures the presence of a protein in saliva that helps transport vitamin D in the body. It may be used to assess vitamin D metabolism or screen for related conditions.

Quick summary

["This qualitative test checks for a key protein involved in vitamin D handling in your saliva."]

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

Key facts at a glance

LOINC
35398-7
Short code
EBV DNA Mouth Ql NAA+probe
Synonyms
EBV DNA Mouth Ql NAA+probe
Category
chemistry
Sample
serum
Container
Red-top tube (SST)
Units
N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
Method
probe-amp-tar
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

Your doctor may order this test as part of a routine checkup, to help investigate symptoms you have been experiencing, or to keep track of a condition you already know you have.

Your healthcare provider may recommend this test if they suspect issues with vitamin D metabolism, such as certain genetic disorders or conditions affecting protein function. It could also be part of a broader evaluation for unexplained symptoms related to vitamin D levels.

The test works by analyzing a small sample from your body in a laboratory, where specialized equipment and trained professionals look for specific substances or markers that reveal important information about your health.

The test uses a saliva sample to detect the presence of vitamin D binding protein through a specific probe method. This helps determine if the protein is present as expected or if there may be abnormalities.

A member of your care team will collect the sample, often a small amount of blood or urine, using a safe and routine procedure. Follow any preparation instructions you are given, such as fasting for a set number of hours or temporarily avoiding certain medications, because these steps help ensure your results are accurate.

You will provide a saliva sample, typically collected by spitting into a provided container. No special preparation is needed, but avoid eating, drinking, or brushing your teeth for about 30 minutes before collecting the sample.

Testing is usually quick and causes little discomfort. If your sample is blood, you may feel a brief pinch when the needle goes in, and the entire visit often takes only a few minutes. Most people can return to their normal activities right away.

The test is usually quick and painless. The saliva sample is then analyzed in a lab to detect the presence of vitamin D binding protein. Results are qualitative, meaning they indicate whether the protein is present or not, rather than providing a specific quantity.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

◆Associated findings1

Short name

Vitamin D Binding Protein (Saliva) Qualitative Test

Frequently asked questions

This test can help identify conditions where vitamin D binding protein levels might be abnormal, such as certain genetic disorders like hypophosphatasia or conditions affecting protein synthesis. It may also be used to monitor vitamin D metabolism in patients with known genetic or metabolic disorders.
How long will I need to wait before my test results are ready and available to me?
Results from this qualitative test are typically available within a few days to a week, depending on your lab’s processing schedule. Your healthcare provider will discuss the results with you during your follow-up visit.
What do a positive or a negative result mean for my health, and what should I do next?
A positive result indicates the presence of vitamin D binding protein in your saliva, which is normal. A negative result may suggest an underlying issue with protein production or metabolism that your doctor will evaluate further with additional tests or clinical correlation.
No specific medications are restricted for this test, but inform your healthcare provider about any medications you are taking, especially those that might affect protein levels or saliva composition.
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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