Fasting Required: Yes, a 14 to 16 hour fast is required for this blood test. However, drink plenty of water and take your medications as prescribed.
Specimen: Blood
Results: 1-2 Business Days
Description: This test measures the level of C-peptide in your blood. C-peptide is a substance made in the pancreas, along with insulin. C-peptide and insulin are released from the pancreas at the same time and in about equal amounts. So a C-peptide test can show how much insulin your body is making. This test can be a good way to measure insulin levels because C-peptide tends to stay in the body longer than insulin.