Insulin & C-Peptide
Answers to common questions about insulin & c-peptide.
Questions on this page
What is C-peptide?
C-peptide is released when the pancreas produces endogenous insulin.
Why is C-peptide measured?
It can help determine how much insulin the pancreas is producing.
Can C-peptide help distinguish diabetes types?
In selected patients, yes.
It can provide information about residual beta-cell function and may be useful when the type of diabetes is uncertain.
What is fasting insulin?
Fasting insulin measures insulin concentration after fasting.
It can sometimes provide metabolic information but should not be interpreted in isolation as a definitive test for insulin resistance.