C-Peptide Test
A byproduct of insulin production. Reflects how much insulin your pancreas is making, not how much you've injected.
What is C-Peptide?
A byproduct of insulin production. Reflects how much insulin your pancreas is making, not how much you've injected.
C-Peptide Reference Range
These are the typical adult reference ranges used by major US labs. Your report will include the specific range used by the lab that processed your sample.
| Population | Range |
|---|---|
| age 18+ | 1.10 – 4.40 ng/mL |
Reference ranges are educational. Always interpret your result with the specific range printed on your lab report and discuss anything outside the range with a clinician.
Sources
Related Diabetes & Blood Sugar biomarkers
Markers commonly tested alongside C-Peptide.
Frequently asked
No. TestWell's licensed physician network reviews and approves your order — usually within minutes. You can place an order online without an in-person visit or a referral from your own doctor.
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