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Insulin Concentration (Serum) Measured Over Multiple Meals

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

This test measures your insulin levels in blood drawn after eating several meals to assess how your body responds to glucose.

Quick summary

["Helps evaluate how well your body manages blood sugar after eating."]

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

Key facts at a glance

LOINC
95114-5
Short code
Insulin 2h p meal SerPl-aCnc
Synonyms
Insulin 2h p meal SerPl-aCnc
Category
hormone
Sample
serum
Container
Red-top tube (SST)
Units
N/A
Ref low
2.6
Ref high
24.9
Fasting
false
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 healthcare provider may order this test if you have symptoms of diabetes, insulin resistance, or unexplained blood sugar fluctuations. It helps determine how effectively your pancreas produces insulin in response to food intake.

What to Expect Before the Test

You’ll follow a specific diet for several days before the test, often including scheduled meals with measured carbohydrate content. Blood samples will be drawn at multiple times after eating to track insulin levels.

How the Test Works

A blood sample is taken from a vein (usually in your arm) at different times after eating. The test measures insulin concentration in your serum, which is analyzed using an immunoassay method to detect insulin levels.

What the Results Mean

Results help identify whether your insulin production is normal, too high, or too low after meals. Abnormal results may indicate conditions like diabetes, hypoglycemia, or other metabolic disorders.

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 my insulin response look like after meals?
Your insulin response after meals is critical for managing blood sugar. If your insulin levels rise too slowly or too quickly, it could signal issues like insulin resistance or inadequate pancreatic function. Your provider will discuss how these results fit with your overall health picture.
Why did my doctor ask for this test?
This test is often used if you have symptoms like frequent hunger, fatigue, or unexplained weight changes, or if your doctor suspects diabetes, prediabetes, or another metabolic disorder. It helps rule out conditions where insulin levels don’t behave as expected after eating.
How long will I need to prepare for this test?
You’ll need to follow a strict diet for several days before testing, including scheduled meals with controlled carbohydrates. Your provider will give detailed instructions, but expect to prepare for at least 3–5 days before your appointment.
  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