Metabolic
C-Peptide
C-peptide is released by the pancreas in equimolar amounts with insulin. It reflects endogenous insulin production and is not affected by exogenous insulin therapy.
Useful for distinguishing Type 1 from Type 2 diabetes and assessing beta-cell function.
What It Measures
Endogenous insulin production by pancreatic beta cells.
Reference Ranges
| Status | Range (ng/mL) |
|---|---|
| Optimal | 1.1–3.0 ng/mL |
| Normal | 0.8–3.5 ng/mL |
| Borderline | 3.5–5.0 ng/mL |
| Out of Range | < 0.8 or > 5.0 ng/mL |
How GATOR Tracks This
Lab Providers
Function HealthLabCorp
Related Clinical Ratios
HOMA-IR
Related Biomarkers
This content is for informational purposes only and does not constitute medical advice. Reference ranges may vary by laboratory and individual factors. Consult a qualified healthcare provider for interpretation of your results and treatment decisions.
Track C-Peptide in GATOR
Import your lab results and see how this biomarker trends over time with AI-powered context.
Get Started Free