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Glycine concentration in serum or plasma

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

This test measures the amount of glycine, an amino acid, in your blood. Glycine plays a role in protein synthesis, metabolism, and other bodily functions.

Quick summary

["Understanding your glycine levels can help assess certain metabolic or liver conditions."]

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

Key facts at a glance

LOINC
2389-5
Short code
Glycine CSF-mCnc
Synonyms
Glycine CSF-mCnc
Category
glucose
Sample
csf
Container
Sterile tube
Units
N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
Specimen volume
1-2 mL
Stability
Immediate analysis required, Refrigerated: 1h
Hemolysis max
200
TAT
4–24 hours
Order
routine

Why Is This Test Done?

Your healthcare provider may order this test if you have symptoms like fatigue, muscle weakness, or unexplained metabolic issues. It can also be part of broader evaluations for conditions affecting amino acid metabolism or liver function.

What to Expect Before the Test

No special preparation is usually needed, but you may be asked to fast for a few hours before the blood draw if instructed by your provider. Bring any medications you’re taking to your appointment.

How the Test Works

A small sample of blood is drawn from a vein, typically in your arm. The sample is then analyzed in a lab to measure glycine concentration using a specialized method, often a form of immunoassay or chromatography.

What the Results Mean

Results are compared to standard reference ranges, though exact values can vary by lab. Abnormal levels may suggest metabolic disorders, liver disease, or other conditions affecting glycine processing.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

◆Associated findings1

Short name

Serum Glycine Level

Frequently asked questions

What causes glycine levels to be abnormal?
Abnormal glycine levels may result from underlying conditions like liver disease, certain genetic metabolic disorders, or kidney issues. Dietary factors, medications, or other health conditions can also influence results.
How long does it take to get results?
Results are typically available within 1 to 3 business days, depending on your lab’s processing time. Your healthcare provider will discuss the findings with you during your follow-up visit.
Can lifestyle changes affect glycine levels?
Dietary changes, such as consuming more or fewer glycine-rich foods (like gelatin or certain proteins), may temporarily influence glycine levels. However, lifestyle factors alone rarely cause long-term abnormalities unless combined with a metabolic disorder.
  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