A C-peptide test measures the amount of C-peptide in the blood. C-peptide is a substance produced when the pancreas releases insulin into the bloodstream. The benefits of getting a C-peptide test include:
Evaluating insulin production: C-peptide levels in the blood indicate the amount of insulin that the pancreas is producing. This test is helpful in determining whether a person has type 1 or type 2 diabetes and whether they need insulin therapy.
Monitoring diabetes treatment: The C-peptide test can help monitor the effectiveness of insulin therapy in people with diabetes. If the C-peptide level is high, it may indicate that the pancreas is still producing insulin, and the insulin therapy dosage may need to be adjusted.
Diagnosing hypoglycemia: The C-peptide test can help diagnose hypoglycemia or low blood sugar levels, which can occur in people with insulinoma or other pancreatic tumors.
Detecting insulin resistance: In people with insulin resistance, the body’s cells do not respond properly to insulin, leading to high blood sugar levels. The C-peptide test can help determine the level of insulin resistance.
Monitoring pancreatic function: The C-peptide test can also help evaluate the function of the pancreas in people with pancreatic diseases such as pancreatitis or pancreatic cancer.