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Methionine S-Glycine Conjugate in Blood (Mass Fraction)

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

This test measures the amount of methionine-glycine conjugate, a metabolic byproduct formed during the breakdown of certain amino acids in your blood.

Quick summary

["Understanding your methionine-glycine conjugate levels may help assess metabolic health."]

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

Key facts at a glance

LOINC
2618-7
Short code
MetHgb MFr RBC
Synonyms
MetHgb MFr RBC
Category
hematology
Sample
whole-blood
Container
Lavender-top (EDTA)
Units
N/A
Ref low
4.2
Ref high
5.9
Critical range
7 N/A – 20 N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
CPT
85041
SNOMED
900000000000003001
Specimen volume
3 mL
Stability
Room temperature: 4h, Refrigerated: 24h
Hemolysis max
0
Lipemia max
0
Icterus max
0
TAT
4–24 hours
Order
routine

What Does This Test Measure?

Methionine-glycine conjugate is a compound formed when methionine, an essential amino acid, is metabolized. This test quantifies its presence in your bloodstream, often linked to amino acid metabolism pathways.

Why Might This Test Be Ordered?

Your healthcare provider may request this test if you have symptoms or conditions related to amino acid metabolism, such as liver disease, certain genetic disorders, or unexplained metabolic imbalances.

How Is the Sample Collected?

A blood sample is drawn from a vein, typically in your arm. The sample is processed and sent to a lab for analysis.

What Are Common Causes of Abnormal Results?

Elevated levels may suggest impaired liver function, genetic metabolic disorders, or certain medications that affect amino acid metabolism. Lower levels could indicate unusual metabolic processing or rare conditions.

Reference range

Adult males: 4.2-5.9; Females: 3.8-5.1 x 10^12/LN/A

Specimen: whole-blood

No special preparation required. Stay well hydrated.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

◆Associated findings1

Short name

Methionine-glycine conjugate level

Frequently asked questions

What does a high level of methionine-glycine conjugate mean?
A high level may indicate metabolic issues, liver problems, or conditions affecting amino acid processing. Your doctor will discuss findings in relation to your overall health and symptoms.
What should I do if my test results are abnormal?
Follow your healthcare provider’s guidance. They may recommend additional tests, lifestyle adjustments, or further evaluation based on your specific situation and symptoms.
Does diet affect this test?
Dietary intake of methionine and other amino acids can influence metabolic processes, potentially affecting conjugate levels. Discuss any dietary changes with your provider before testing.
  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