Skip to content

Insulin concentration in serum measured during a 10-minute post-glucose challenge (10-minute postprandial insulin)

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

This test helps assess how your body responds to glucose after eating, which can indicate how well your pancreas produces insulin.

Quick summary

["Measures insulin levels shortly after eating to evaluate insulin sensitivity and pancreatic function."]

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

Key facts at a glance

LOINC
48116-8
Short code
Insulin 10M pre Glc SerPl-aCnc
Synonyms
Insulin 10M pre Glc SerPl-aCnc
Category
glucose
Sample
serum
Container
Red-top tube (SST)
Units
N/A
Ref low
2.6
Ref high
24.9
Fasting
true
Population
adult
Sex
all
Age range
18–65 years
CPT
83525
SNOMED
413618004
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 you have symptoms of diabetes, insulin resistance, or metabolic issues. It can also be used to monitor conditions like prediabetes or to check how well certain medications affect insulin production.

What to Expect Before the Test

You’ll likely fast for a few hours before the test. After fasting, you’ll drink a sugary liquid, and blood will be drawn 10 minutes later to check insulin levels. The process is quick and usually done in a clinic or lab.

How the Test Works

After drinking the glucose solution, your blood sugar rises temporarily. The test measures insulin in your blood at that time to see how your body reacts. This helps doctors understand how your pancreas releases insulin in response to food.

What the Results Mean

Results help doctors diagnose conditions like diabetes, insulin resistance, or other metabolic disorders. Abnormal results may indicate how well your body manages glucose and insulin over time.

Reference range

Fasting: 2.6-24.9 μIU/mLN/A

Specimen: serum

No special preparation usually required. Stay well hydrated. Inform your healthcare provider of all medications and supplements you are taking.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

◆Associated findings1

Frequently asked questions

What does a high insulin level mean in this test?
A high insulin level after a glucose challenge may suggest insulin resistance, an overactive pancreas (e.g., insulinoma), or other metabolic issues. Your doctor will interpret results in the context of your overall health and symptoms.
Can fasting affect this test?
Yes, fasting is important because it ensures your body isn’t already responding to stored glucose. Skipping fasting could lead to misleading results.
Is this test the same as a glucose tolerance test?
No, this test specifically measures insulin levels during the glucose challenge, while a glucose tolerance test measures blood sugar levels. Both help assess how your body handles glucose, but they measure different substances.
  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