C-Peptide, Serum

Diagnostic Blood Test: C-Peptide, Serum C-Peptide, Serum measures the levels of C-peptide in the blood, providing valuable insights into insulin production and pancreatic function. C-peptide is a byproduct of insulin synthesis; it is released in equimolar amounts with insulin when proinsulin is cleaved into insulin and C-peptide. Unlike insulin, C-peptide has a longer half-life and is not significantly extracted by the liver, making it a reliable marker for endogenous insulin secretion. This test is essential for diagnosing and managing various conditions related to insulin production and glucose metabolism.