GABA (Gamma-Aminobutyric Acid) in Serum or Plasma
This test measures the level of GABA, a natural chemical in your blood that helps regulate nerve cell activity. It may be used to assess brain function or monitor conditions affecting GABA levels.
["GABA helps calm brain activity; levels may be checked for neurological concerns or treatment follow-up."]
Key facts at a glance
- LOINC
- 87496-6
- Short code
- Gabapentin SerPlBld Ql Scn
- Synonyms
- Gabapentin SerPlBld Ql Scn
- Category
- chemistry
- Sample
- serum
- Container
- Red-top tube (SST)
- Units
- N/A
- Ref low
- 0
- Ref high
- 17
- Fasting
- false
- Population
- adult
- Sex
- all
- Age range
- 18–65 years
- Method
- screen
- 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 like seizures, anxiety, or neurological issues. It could also be part of evaluating conditions such as epilepsy, brain tumors, or certain metabolic disorders. Rarely, it may be used to monitor medications that affect GABA levels.
What to Expect Before the Test
No special preparation is usually needed, but you may be asked to fast for 8–12 hours before the blood draw if instructed. Avoid alcohol or certain medications that could affect results for 24 hours beforehand.
What the Test Involves
A healthcare professional will draw blood from a vein in your arm. You may feel a slight pinch, but it typically doesn’t cause significant discomfort. The blood sample will be sent to a lab for analysis.
What the Results Mean
Results are compared to a general reference range, though exact values can vary by lab. Abnormally high or low levels may suggest underlying health concerns, such as neurological disorders or metabolic imbalances.
Reference range
NCBI: NSE 0-17 ng/mLN/A
No special preparation usually required. Stay well hydrated. Inform your healthcare provider of all medications and supplements you are taking.
Clinical interpretation
How abnormal results are interpreted and what conditions they suggest.
GABA levels can be elevated in conditions like epilepsy, brain tumors, or certain genetic disorders. Low levels may indicate metabolic disorders, nerve damage, or exposure to toxins. Always discuss results with your provider for personalized interpretation.
Short name
GABA Level
Frequently asked questions
How long does it take to get my results?
Can I eat or drink before this test?
Does this test require fasting?
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 17, 2026. · Read our editorial policy