Thursday, June 8, 2023


Reference Range

C-peptide is a peptide composed of 31 amino acids. It is released from the pancreatic beta cells during cleavage of insulin from proinsulin. It is mainly excreted by the kidney, and its half-life is 3-4 times longer than that of insulin.

The reference ranges for C-peptide are as follows

Fasting: 0.78-1.89 ng/mL or 0.26-0.62 nmol/L (SI units)

1 hour after glucose load: 5-12 ng/mL

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