Amino Acid Panel (Plasma Amino Acids) Test: What It Is and What Your Results Mean
This blood test measures levels of three important amino acids—beta-alanine, beta-aminoisobutyrate, and gamma-aminobutyrate (GABA)—to help evaluate your metabolism, liver function, and nervous system health.
{"This test measures three amino acids in your blood: beta-alanine, beta-aminoisobutyrate, and GABA","It helps doctors evaluate liver function, muscle metabolism, and nervous system health","A small blood sample is taken from a vein in your arm","Results help diagnose certain metabolic and neurological conditions","No special preparation is typically needed, but follow your doctor's instructions"}
Key facts at a glance
- LOINC
- 79650-8
- Short code
- BABAGAP
- Synonyms
- B-Alanine + B-AIB + GABA Pnl SerPl
- Category
- chemistry
- Sample
- serum
- Container
- Red-top vacutainer (serum) or green-top (lithium heparin) plasma tube; avoid hemolysis
- Units
- N/A
- Ref low
- 0
- Ref high
- 10
- Fasting
- false
- Population
- adult
- Sex
- all
- Age range
- 0–999 years
- Method
- Liquid chromatography-tandem mass spectrometry (LC-MS/MS) or ion exchange chromatography with ninhydrin detection
- CPT
- 82139
- SNOMED
- 426900009
- Specimen volume
- 2-5 mL of serum or plasma
- Stability
- Serum/plasma stable for 24 hours at room temperature, 1 week at 2-8°C, and 3 months at -20°C or below for long-term storage
- Hemolysis max
- 100
- Lipemia max
- 50
- Icterus max
- 25
- TAT
- 72–168 hours
- Order
- routine
What is an amino acid panel, and why might my doctor order this test for me?
The Beta Alanine, Beta Aminoisobutyrate, and Gamma Aminobutyrate (GABA) Panel is a blood test that measures the levels of three specific amino acids in your bloodstream. Amino acids are the building blocks of proteins and play crucial roles in various bodily functions. This panel helps healthcare providers assess how well your body processes these important compounds and can reveal important information about your overall health.
What are amino acids, and why do these building blocks of protein matter for my health?
Beta-alanine is a non-essential amino acid that combines with histidine to form carnosine, which helps buffer acid in muscles during exercise. Beta-aminoisobutyrate (BAIB) is produced when your body breaks down thymine, a component of DNA, and elevated levels may indicate liver disease or certain metabolic conditions. Gamma-aminobutyrate (GABA) is the main inhibitory neurotransmitter in your brain, meaning it helps calm nerve activity and is essential for maintaining proper brain function and regulating mood.
How is the amino acid panel test performed, and do I need to do anything to prepare for it?
A healthcare professional will draw a small sample of blood from a vein in your arm using a needle. The blood sample will be collected in a tube and sent to a laboratory for analysis. The procedure usually takes only a few minutes and is generally well-tolerated. You may experience slight discomfort or a bruise at the injection site, but serious complications are rare.
What do my amino acid panel results mean, and what happens if my levels are too high or too low?
Your test results will show the levels of each amino acid in your blood. Abnormal levels may indicate various health conditions. For example, elevated beta-aminoisobutyrate may suggest liver disease or certain metabolic disorders. Changes in GABA levels may be related to neurological conditions. Your healthcare provider will interpret your results in the context of your overall health, symptoms, and other test findings.
Reference range
Beta-alanine: <10 µmol/L; Beta-aminoisobutyrate: <8 µmol/L; Gamma-aminobutyrate (GABA): <0.1 µmol/L. Reference ranges vary by methodology and laboratory.N/A
No special preparation required. Patient should be well-hydrated. Avoid strenuous exercise immediately prior to collection as it may affect amino acid levels.
Clinical interpretation
How abnormal results are interpreted and what conditions they suggest.
This amino acid panel has several important clinical applications. Healthcare providers may order this test to evaluate liver function, as the liver plays a key role in amino acid metabolism. Abnormal beta-aminoisobutyrate levels can indicate liver disease or impaired thymine metabolism. The test may also help diagnose certain inherited metabolic disorders that affect how the body processes amino acids. Additionally, GABA measurements can provide information about neurological function, as GABA is a critical neurotransmitter that helps regulate brain activity and may be relevant in conditions affecting the nervous system.
Frequently asked questions
Do I need to fast before this test?
Is this test safe?
How long does it take to get results?
What happens if my results are abnormal?
Can I take my regular medications before the test?
Sources
- 1
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- 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 15, 2026. · Read our editorial policy