C-peptide Test FAQ
What is a C-peptide test?
Why is a C-peptide test important?
What type of specimen will I submit?
Do I need to fast to take this test?
How long does it take to get test results?
Accesa Labs does not provide medical advice, diagnosis or treatment. All users should consult with a medical provider for specific health concerns.
C-peptide Blood Test - More Information
The C-peptide test, sometimes known as a C-peptide lab test, measures C-peptide blood level.
C-peptide is a molecule that consists of amino acids and joins two parts of the proinsulin molecule together. The C-peptide test level is sometimes helpful to measure when used in conjunction with the blood insulin test level as C-peptide and insulin are bound together when made by the pancreas and are secreted in relatively equal amounts. As a result, C-peptide is useful as a blood marker to differentiate insulin produced naturally versus injected externally.
Although C-peptide levels are related to insulin levels, C-peptide typically does not affect the blood glucose (as measured by the blood glucose test) or hemoglobin A1c levels. However, C-peptide can be useful in determining if excessive medication use or tumors are causing low blood sugar levels. C-peptide levels are useful in determining if someone has Type I diabetes as the C-peptide levels are typically low in those instances.
To get a C-peptide test near you at a Quest Diagnostics lab, just order online and get your blood drawn at the selected lab. Once the C-peptide lab results are ready, they will be available for electronic download. As can be seen on the sample C-peptide lab report above, the C-peptide blood level is reported as a number and can be compared against the reference range provided by the lab.
Overall, along with diabetes markers measured in the Diabetes Management Panel, C-peptide levels are being used more regularly in assessing overall diabetic control.
- A doctor's lab order
- 24 / 7 order processing
- Access to 1000+ Quest labs
- All lab test fees
- A PDF copy of your test results
- Responsive customer service