Normal C peptide level: What is normal c... - Diabetes India

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Normal C peptide level

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What is normal c peptide level?

In my reports normal range was from 0.9 to 7 ng/ml. But Google shows something else only.

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Look at the unit of measurement:

What is your test number?

Fasting: 0.78-1.89 ng/mL or 0.26-0.62 nmol/L (SI units)



Test Usage

C-peptides are fragments derived from endogenous, but not exogenous, insulin and therefore may be used to assess endogenous insulin secretion even in patients who receive exogenous insulin therapy.

C-peptide testing is used in the investigation of unexplained hypoglycaemia and in the management of patients with insulin treated diabetes.

Investigation of hypoglycaemia:

A C-peptide concentration greater than 300 pmol/L during a hypoglycaemic episode (concurrant glucose <2.5 mmol/L), is inappropriately high suggesting insulinoma or sulfonylurea ingestion. C-peptide is considered appropriately supressed if less than 94 pmol/L during hypoglycaemia. Indeterminate values are 94-300 pmol/L.


C-peptide test results are classed within 3 ranges/values.


The normal range for a c-peptide test is: 0.51 to 2.72 nanograms per millilitre (ng/mL)

This may also be expressed as: 0.17-0.90 nanomoles per litre (nmol/L)

The following information serves only as a guide. Your doctor should be able to advise you as to what the test results may indicate.


Mine is 0.985 ng/ml


That is good you are well within the limits of the units of measurement!

Fasting: 0.78-1.89 ng/mL

Enjoy your holidays.


A normal result is between 0.5 to 2.0 nanograms per milliliter (ng/mL), or 0.17 to 0.83 nanomoles per liter (nmol/L).

Normal value ranges may vary slightly among different laboratories. Some labs use different measurements or test different samples. Talk to your provider about the meaning of your specific test results.


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