← Heart & Metabolic · Wellness

C-Peptide Test

Shows how much insulin your body is actually making on its own.

$ 49.00All-in price

Every molecule of insulin your pancreas makes comes with a matching molecule of C-peptide. Injected insulin does not. That makes C-peptide the cleanest way to see how much insulin your own body is still producing.

What it tells you: whether your pancreas is underproducing, overproducing, or keeping up. Low results point toward insufficient production. High results often accompany insulin resistance, where the body makes plenty but the cells respond poorly.

Who orders it: people whose doctor asked for it, anyone sorting out an unclear diabetes picture, people already tracking insulin resistance who want the production side of the story, and patients on insulin therapy whose team wants to know what the pancreas still contributes.

How it works: order online, walk into a test center, no appointment. Results post to your secure account, usually in 1-2 business days.

Fasting: usually requested, 8 to 12 hours with water. Follow your doctor's instruction if they gave one.

Frequently Asked Questions

Is this the same as an insulin test?
Related but not identical. C-peptide reflects only what your body produced, so it stays meaningful even for people taking insulin.
Should I pair it with anything?
Fasting glucose and fasting insulin together give the fullest metabolic picture. Our Insulin Resistance Panel covers that ground.
Is this a diabetes diagnosis?
No. It is one input a physician uses. Bring the report to yours.

Pairs Well With: Same Blood Draw

Insulin Resistance Panel+ Add
$ 49.00
✓ The price you see is the price you pay. No draw fees. No physician fees. No surprise bills. $ 49.00 is all-in.
Comparing prices? Some self-pay labs advertise a low number, then add ~$28 in "lab & physician fees" at checkout. We don't. What you see here is the whole cost.
⚡ We send your lab order electronically to the test center in 2–3 minutes. Nothing to print, nothing to bring. Just walk in and sign in.
📍 Can you get tested nearby?

Test centers don’t accept payment. You pay securely here; the lab just does the draw.

Already ordering a panel? Add this to the same order and it runs from the same blood draw. One visit, one stick, no second trip.
⚡ Results 1-2 business days

What happens after you order?

  • 1Your lab order form & test code appear in your secure online account, with your test center’s address.
  • 2We send your lab requisition to the test center electronically.
  • 3Walk in & get tested. Tests usually take 5 minutes or less.
📞 Need support? (866) 873-0879
$ 49.00all-in · no extra fees