Skip to content

GABA (Gamma-Aminobutyric Acid) in Serum/Plasma

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

This test measures the amount of GABA, a natural chemical in your blood that helps regulate brain activity.

Quick summary

["GABA levels may help assess brain chemistry or be checked for certain neurological conditions."]

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

Key facts at a glance

LOINC
74964-8
Short code
Gabapentin Trough SerPl-mCnc
Synonyms
Gabapentin Trough SerPl-mCnc
Category
chemistry
Sample
serum
Container
Red-top tube (SST)
Units
N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
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 sleep disorders. It could also be part of a broader evaluation for conditions affecting brain function or neurological disorders.

What to Expect Before the Test

No special preparation is usually needed. You may have a small needle inserted into your arm or vein to draw blood. If you’re taking medications that affect GABA, let your provider know.

What the Results Mean

Results are not typically interpreted alone. They’re compared with your overall health, symptoms, and medical history. Abnormal levels might suggest issues like epilepsy, neurological disorders, or metabolic imbalances.

Common Conditions Monitored

GABA levels may be checked in people with epilepsy, anxiety disorders, or other brain-related conditions. It’s also sometimes used in research or specialized care plans.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

◆Associated findings1

Short name

GABA Level

Frequently asked questions

What causes abnormal GABA levels?
Abnormal GABA levels can result from genetic disorders, certain medications, liver or kidney disease, or neurological conditions like epilepsy. Your provider will consider all factors when interpreting results.
How long does it take to get results?
Results are usually available within 1–3 business days, depending on your lab. Follow-up with your provider to discuss findings.
Can I eat or drink before this test?
Typically, fasting is not required for this test. However, always follow your provider’s instructions to avoid any potential interference.
  1. 1
    MedlinePlus — Laboratory TestsSource
  2. 2
    Lab Tests OnlineSource
  3. 3
    Mayo Clinic — Tests & ProceduresSource

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.

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