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: Glutamate, Serum or Plasma

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

: This test measures the amount of glutamate, an amino acid and neurotransmitter, in a sample of blood serum or plasma.

Quick summary

[": A glutamate blood test can help evaluate amino acid metabolism and certain neurological or metabolic conditions."]

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

Key facts at a glance

LOINC
47626-7
Short code
Glutamate SFr Amn
Synonyms
Glutamate SFr Amn
Category
chemistry
Sample
fluid
Container
Sterile tube
Units
N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
Specimen volume
2-5 mL
Stability
Room temperature: 2h, Refrigerated: 24h
Hemolysis max
300
TAT
4–24 hours
Order
routine

: What Is Glutamate?

: Glutamate is an amino acid that serves as a building block for proteins and as a key chemical messenger in the nervous system. It is normally kept within a balanced range in the blood and tissues.

: Why the Test Is Ordered

: A healthcare provider may order this test to investigate unusual neurological symptoms, to help assess certain metabolic disorders, or to monitor a known condition affecting amino acid levels. It is not a routine screening test.

: How the Sample Is Collected

: A blood sample is typically drawn from a vein in your arm. Because amino acid levels can shift with food and timing, your provider may ask you to fast or follow special preparation instructions before the draw.

: What Results Can Mean

: Results are interpreted alongside your symptoms, medical history, and other laboratory tests. Levels outside the expected range may reflect metabolic, nutritional, or neurological issues, but a single result is rarely conclusive on its own.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

: Glutamate measurement can be clinically useful when evaluating disorders of amino acid metabolism and certain nervous system conditions. Because glutamate is involved in many normal body processes, results must be interpreted carefully by a qualified clinician in the context of the whole clinical picture.

Short name

: Glutamate

Frequently asked questions

: Do I need to fast before this test?
: Your provider will tell you whether fasting or other preparation is needed. Follow the instructions given with your test order, since preparation can affect amino acid levels.
: Is this a common routine test?
: No. Glutamate testing is specialized and is usually ordered for specific clinical reasons rather than as part of standard screening.
: Can I interpret my result on my own?
: No. Glutamate levels depend on many factors, and results should always be reviewed by your healthcare provider, who will consider them together with your history and other tests.
  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