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Choose collection locationDiabetes · Individual laboratory test
C-Peptide, Fasting
C-peptide is released alongside insulin made by your pancreas. A fasting sample can help a clinician understand how much insulin your own body is producing.
Price for this test on its ownAED 190Test price AED 90
Clinical authorDr Nirupama SabhapathySpecialist Clinical Pathology
- Sample
- Serum
- Laboratory turnaround
- 24 hours
- Collection
- Dubai
- Laboratory
- Intel Lab
Understanding the test
What does the Fasting C-Peptide test measure?
Also called Insulin Production Marker
Clinicians may assess C-peptide when the amount of insulin produced by the pancreas is uncertain. It can also contribute to a specialist investigation of low glucose.
When it may be requested
Insulin made by the body
C-peptide can help distinguish the pancreas's production from injected insulin.
A specialist glucose assessment
Measured with glucose, it may contribute to investigation of unexplained low readings.
Before your sample
Prepare for collection
SpecimenSerum
Your checklist
Follow the fasting instructions for the booked collection. If you use insulin or other glucose-lowering medicine, agree timing with the prescribing clinician before fasting.
A clinician takes a small sample of blood from a vein. The laboratory uses serum, the liquid separated from the blood after it clots.
Smart Report
Understanding your result
24 hoursLaboratory turnaround
Result guideC-Peptide, Fasting
Reading your result
Injected insulin contains no C-peptide. Kidney function and the glucose at collection still affect what a measured C-peptide means.
What can affect it
- C-peptide alone does not establish the type of diabetes or explain all causes of low glucose.
From sample to follow-up
Your testing journey
Laboratory testC-Peptide, Fasting
- Specimen
- Serum
- Turnaround
- 24 hours
Open your laboratory report
Look for C-Peptide, Fasting in your report. Use the sample type and collection time when comparing it with an earlier report.
Explore Smart Report
Discuss the next step
Ask whether the blood glucose recorded at the same time supports the interpretation of your C-peptide result.
Health packages
Packages that include this test
Compare the other tests in each package before choosing.
Clinical expertise
Your laboratory team
Patient questions
Before you book
Why is my glucose at the time of the draw important?
The expected insulin response depends on whether glucose is low or high. A C-peptide value has different implications in those two settings.
Why measure C-peptide instead of insulin itself?
Two reasons. Insulin is partly removed by the liver as soon as it is released, so blood insulin fluctuates more; and if you take insulin by injection or pump, an insulin measurement cannot distinguish that from your own. C-peptide is produced only by your pancreas, so it reflects your own output.
Why does kidney function matter here?
The kidneys are the main route by which this fragment leaves the blood. When kidney function is reduced it accumulates, so the level can look high even when the pancreas is producing normally. Your doctor allows for this when interpreting the result.
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Your next step
Fasting C-Peptide test at home.
Sources & further reading
Written by Dr Nirupama Sabhapathy, Specialist Clinical Pathology. Medically reviewed by Dr Joyce Jose, Specialist Clinical Pathology, on .
Catalogue information and AED price checked on 2 November 2026. Clinical suitability, preparation, collection arrangements and turnaround are confirmed for your selected test.