Baib24hurmrate
This test measures the amount of beta-aminoisobutyric acid in your urine collected over 24 hours.
{"Beta-aminoisobutyric acid is a substance produced when your body breaks down certain DNA components","The test helps doctors evaluate your vitamin B12 and folate (vitamin B9) status","You will need to collect all urine produced in a 24-hour period for accurate results"}
Key facts at a glance
- LOINC
- 9320-3
- Short code
- BAIB24
- Synonyms
- B-AIB 24h Ur-mRate
- Category
- chemistry
- Sample
- urine
- Container
- 24-hour urine collection container (sterile, without preservatives)
- Units
- N/A
- Ref low
- 0
- Ref high
- 50
- Fasting
- false
- Population
- adult
- Sex
- all
- Age range
- 18–99 years
- Method
- Ion Exchange Chromatography
- CPT
- 82139
- SNOMED
- 39579005
- Specimen volume
- Entire 24-hour urine collection; minimum 10 mL aliquot for analysis
- Stability
- Refrigerated (2-8°C): 7 days; Frozen (-20°C): 30 days
- Hemolysis max
- 0
- Lipemia max
- 0
- Icterus max
- 0
- TAT
- 48–96 hours
- Order
- routine
What is this test?
The beta-aminoisobutyrate test measures the level of a non-protein amino acid called beta-aminoisobutyric acid (β-AIB) in your urine collected over 24 hours. This substance is naturally produced when your body breaks down thymine, which is a building block of DNA.
How is the test performed?
You will receive a special container for urine collection. For 24 hours, you will collect all urine you produce during that time period. This includes the first morning urine on day one (which you skip) through the first morning urine on day two (which you do collect). Keep the container refrigerated or on ice during the collection period. After 24 hours, return the container to your healthcare provider as instructed.
Why is this test ordered?
This test is primarily used to help evaluate your body's status of certain B vitamins, specifically vitamin B12 and folate (vitamin B9). It may also be used in research settings to study certain metabolic conditions or genetic factors that affect how your body processes DNA components.
Reference range
0-50 mg/24h (varies by laboratory)N/A
No special preparation required. Patient should maintain usual diet and hydration. Collect all urine over a 24-hour period.
Clinical interpretation
How abnormal results are interpreted and what conditions they suggest.
◆Associated findings1
Frequently asked questions
Do I need to fast before this test?
What happens if I miss collecting urine during the 24-hour period?
Are there any medications that affect this test?
When will I get my results?
Sources
- 1
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