C-Peptide, Serum
Fasting Required: Yes 12 hours

Specimen: Blood

Lab: Quest Diagnostics

Results: 3-5 business days
Note: Result turnaround times are an estimate and are not guaranteed. Our reference lab may need additional time due to weather, holidays, confirmation/repeat testing, or equipment maintenance.

Description: C-Peptide can be used to monitor insulin production in the body, blood sugar disorders, and the activity of tumors that secrete insulin. It can also help determine if you have type 1 or type 2 diabetes (Type 1 = your body doesn't make insulin. Type 2 = either your body doesn't make enough insulin or your cells ignore it). If you have diabetes, the C-peptide test can show how well your treatment is working.

Alternative Name(s): C-Terminal Insulin