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C Peptide

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Created: 27/02/2024
Edited: 27/02/2024
Written by: Aoife Maguire

What is being analysed?

C Peptide is a blood test that measures the level of C-peptide in the blood.

What does the result mean?

The result indicates the amount of C-peptide produced by the pancreas. It helps evaluate insulin production by the body.

Why do the analysis?

C Peptide analysis is done to assess insulin production in individuals with diabetes and to differentiate between type 1 and type 2 diabetes.

When to do the analysis?

It is typically done when evaluating diabetes, especially when distinguishing between type 1 and type 2 diabetes, or when monitoring insulin production in diabetic patients.

What sample is required?

A blood sample is required for C Peptide analysis.

Is any type of prior preparation necessary?

Fasting may be required before the test, depending on the doctor’s instructions.

How is it used?

C Peptide levels are used to assess insulin production and determine appropriate treatment plans for diabetic patients.

What are the normal values?

Normal C Peptide Levels

Adults: 0.5 - 2.0 ng/mL

Children: 0.2 - 0.9 ng/mL

What does it mean to have altered values?

Low levels: Low C Peptide levels may indicate decreased insulin production, which can occur in type 1 diabetes or advanced stages of type 2 diabetes.

High levels: High C Peptide levels may suggest increased insulin production, commonly seen in early stages of type 2 diabetes or insulin resistance.

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