Alpha-Aminobutyrate, 24-Hour Urine — Excretion Rate
Measures the amount of alpha-aminobutyrate excreted in urine over 24 hours. This test may help evaluate amino acid metabolism and nutritional status.
["This 24-hour urine test measures daily alpha-aminobutyrate excretion to help assess amino acid metabolism and nutritional status."]
Key facts at a glance
- LOINC
- 25305-4
- Short code
- A-Aminobutyr 24h Ur-sRate
- Synonyms
- A-Aminobutyr 24h Ur-sRate
- Category
- liver
- Sample
- urine
- Container
- Sterile urine container
- Units
- N/A
- Fasting
- false
- Population
- adult
- Sex
- all
- Age range
- 18–65 years
- Specimen volume
- 10 mL
- Stability
- Room temperature: 2h, Refrigerated: 24h, Frozen: 7d
- Hemolysis max
- 0
- Lipemia max
- 0
- Icterus max
- 0
- TAT
- 4–24 hours
- Order
- routine
What is this test?
Alpha-aminobutyrate is a type of amino acid. This test measures how much of it your body releases in urine during a 24-hour period. The reported result is an excretion rate rather than a simple concentration.
Why might I need this test?
A clinician may order this test to evaluate amino acid metabolism, nutritional status, or changes in kidney handling of amino acids. It may also be used as part of a broader assessment of an unexplained abnormal laboratory result.
How is the test performed?
You collect all urine produced for 24 hours in a labeled container provided by the laboratory. The laboratory measures the amount of alpha-aminobutyrate in the collection and may calculate the daily excretion rate.
How do I prepare for the test?
Follow the laboratory's collection instructions carefully, including when to begin and end the 24-hour period. Keep the container refrigerated if instructed, record any missed collections, and tell the laboratory about medications or supplements that could affect the result.
Clinical interpretation
How abnormal results are interpreted and what conditions they suggest.
An abnormal result may reflect changes in amino acid metabolism, nutrition, hydration, or kidney function. Urinary levels can also be affected by medications, supplements, diet, and collection completeness, so results should be interpreted alongside other findings by your clinician.
Short name
24-Hour Urine Alpha-Aminobutyrate
Frequently asked questions
Why is urine collected for 24 hours?
What if I miss part of the urine collection?
Does an abnormal result mean I have a disease?
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