C-Peptide

Also known as:Insulin C-peptide; Connecting peptide insulin; Proinsulin C-peptide
Formal name: C-peptide
Related tests: Insulin; Glucose

Why should I do it?
To monitor insulin production by the beta cells in the pancreas and to help determine the cause of hypoglycemia

When should I do it?
When you have diabetes and your doctor wants to determine if you are producing enough of your own insulin or if it is time to supplement oral medication with insulin injections or an insulin pump; when your doctor suspects you have insulin resistance; and when you have documented hypoglycemia

What Kind of Sample is Needed?
A blood sample drawn from a vein in your arm and sometimes a 24-hour urine sample

Test Preparation Needed?
Ask your doctor if you need to fast before having this test performed.