C Peptide
C Peptide
C Peptide
C Peptide

C Peptide

Alternative blood test for insulin level
Vacutainer Collection by Healthcare Professional Only
Order by 3pm m-f for same day dispatch
Biomarkers Included: 1 - See below for details
Estimated Turnaround Time in working days: 5
Inclusions: C Peptide
Lab Code: BH194
Free Delivery
Regular price£139.00
Collect 1390 Pathology Points worth £13.90 to put towards future testing.

Thank you - 1% from your order total goes towards Our Charity of the Month

A Phlebotomy Only Test

This blood test is unavailable for fingerprick (microtainer) collection. If you're unsure about how to access this test or how the procedure works please watch this short video.

Sample Collection Options for this C Peptide Test.

Arrange own Phlebotomy

Cost: Arrange Yourself

If you have access to a Healthcare Professional this kit for a C Peptide Test has all they'll need.

Visit a Partner Clinic

Cost: Add £30

We have partnered with Superdrug and Circle Health Hospitals in order to provide you with phlebotomy.

Find a Clinic

Nurse Home Visits

Cost: Add £55

Let our Nurses come to your home or place of work - we cover Mainland England, Wales, Scotland & Northern Ireland.

Learn More

This blood test is for C-peptide, a substance produced by the pancreas in equal proportions to insulin. It is a more stable compound than insulin, so practically it can be used to assess insulin secretion, in both normal subjects and in those who are insulin treated. Low C-peptide levels indicate decreased insulin production.

C-peptide levels can also help to differentiate between type 1 and type 2 diabetes. In type 1 diabetes, the pancreas produces little or no insulin, and therefore little or no C-peptide. In type 2 diabetes, C-peptide levels will typically be normal or high, as the pancreas is working harder to overcome insulin resistance (reduced sensitivity to the effects of insulin) by producing more insulin. An insulinoma (tumour producing insulin) will also give rise to high C-peptide levels.

Often requested alongside a test for Fasting Glucose, a low level of C peptide with a normal or high Fasting Glucose level may indicate Type 1 diabetes, or longstanding Type 2 diabetes. If the Fasting Glucose level is low and the C peptide is also low, it may just indicate a lack of food intake recently or rarely Addison's disease.

Special Instructions: 8 - 12 hours fasting required
Laboratory Notes: C Peptide
Quick and Reliable.

There's a reason that over 30% of Blue Horizon Kit requests are from patients that have used us before.

Blue Horizon Blood Test Reviews


Extremely efficient service from beginning to end. Procedure carried out quickly and efficiently. Results were very swift. Will be using again.

Lisa Underhill-Price

Impressed with speed of despatch after ordering. Kit and instructions very easy to understand and follow. Posted back to lab Monday morning, results received Wednesday morning, Thanks, may well be back soon.

Paula Loftus

As always, a superb service by all the BH team. Fast, efficient but very thoughtfuland caring of medical conditions, and associated patient mindset.. highly reccomended .cg

Chris Gomez

Utterly patient, kind and helpful, kit arrived next day, as did my results. 5 stars well-deserved.

Dell Finniam

Great service and product. The turn around is brilliant (mostly - there was a glitch during the early part of the Covid pandemic, but that seems to be resolved now). Tests are recognised by the medical profession so I am able to use the results to get the treatment I need without further tests.

Alexis Faulkner

I had various questions which they answered via email/webchat and the timing of getting a kit, sending it back and getting the results was good.

Bruce Robins

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