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Glucagon Concentration Following a Standard Meal Challenge (Serum)

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

This test measures the level of glucagon in your blood after you eat a standard meal. Glucagon is a hormone that helps regulate blood sugar levels.

Quick summary

["Assesses how your body responds to food by tracking glucagon levels post-meal."]

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

Key facts at a glance

LOINC
95100-4
Short code
Glucagon 4h p meal SerPl-mCnc
Synonyms
Glucagon 4h p meal 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 Is Done

Your doctor may order this test if they suspect a condition that affects how your body manages blood sugar, such as diabetes or a hormonal imbalance. It can also help diagnose or monitor conditions like hypoglycemia (low blood sugar) or other metabolic disorders.

What to Expect Before the Test

You’ll fast for about 12 hours before the test. On the day of the test, you’ll eat a specific meal provided by the lab or hospital. Blood will be drawn at set intervals to measure glucagon levels throughout the meal.

During the Test

A healthcare professional will insert a small needle into a vein in your arm to collect blood samples. You may feel a slight pinch, but it usually doesn’t cause discomfort. The blood samples will be sent to a lab for analysis.

After the Test

You can resume your normal activities immediately. If you experienced any unusual symptoms during the test, such as dizziness or lightheadedness, let your doctor know right away.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

This test helps evaluate how your pancreas and liver respond to food, particularly in managing blood sugar. Abnormal results may indicate issues like hypoglycemia, pancreatic disorders, or other metabolic conditions that require further medical evaluation.

Short name

Glucagon Post-Meal Test

Frequently asked questions

How long does it take to get the results of this test?
Results are typically available within a few days to a week, depending on the lab and your healthcare provider’s schedule. Your doctor will discuss the findings with you during your follow-up visit.
What does a low or high glucagon level mean?
Low glucagon levels may suggest problems with your pancreas’s ability to release it, which could be linked to conditions like diabetes or other metabolic disorders. High levels might indicate overactivity of the pancreas or other hormonal imbalances. Your doctor will interpret the results in the context of your overall health and symptoms.
Can I eat or drink anything before the fasting period?
No, you must fast for 12 hours before the test, including no food or liquids (except water) except for the specific meal provided on the day of the test.
  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