C-peptide (Serum/Plasma, Mass Concentration)

Why is this test done?

Your doctor may order a C-peptide test to check if your pancreas is making enough insulin, especially if you have diabetes or symptoms like unexplained weight loss, fatigue, or high blood sugar levels. It can also help determine whether insulin is the cause of symptoms or if another issue is present.

How is the test performed?

A small blood sample is taken from a vein in your arm. The blood is sent to a lab where it is processed to measure C-peptide levels. No special preparation is usually needed, but you may be asked to fast for a few hours before the test.

What does the test result mean?

Results are interpreted by your healthcare provider based on your medical history and symptoms. High or low levels may indicate problems with insulin production or diabetes. There is no single reference range provided here as values can vary based on individual health and testing context.

What are the common reasons for testing?

Common reasons include diagnosing type 1 or type 2 diabetes, assessing insulin resistance, evaluating pancreatic function, and monitoring treatment for diabetes or other endocrine conditions.