C-PEPTIDE

The C-Peptide test measures the level of C-peptide in the blood, which is a byproduct of insulin production. When the pancreas produces insulin, it is initially created as a precursor molecule called proinsulin , which is then split into two parts: insulin and C-peptide . The C-peptide is released into the bloodstream in equal amounts to insulin, making it a useful marker for assessing insulin production and pancreatic function .