Skip to content

When should I return my sample over the bank holiday? Find out more.

C Peptide Blood Test
C Peptide Blood Test Contents
Results on my.medichecks health portal
C Peptide Blood Test

C Peptide Blood Test

C-peptide is released into the blood when insulin is produced by the pancreas. This test measures the level of C peptide in your blood to distinguish between type 1 and type 2 diabetes when diabetes has just been diagnosed, to help find the cause of low blood sugar.
Blood sample 1 test included 5 working days turnaround


C-peptide is a peptide that is made when proinsulin is split into insulin and C-peptide. C-peptide is generally found in amounts equal to insulin.

A C-peptide test can be done when diabetes has just been diagnosed and it is not clear whether type 1 diabetes or type 2 diabetes is present or to help find the cause of low blood sugar (hypoglycaemia), such as excessive use of medicine to treat diabetes or a noncancerous growth (tumour) in the pancreas.

Amino Acids

Fast 8 - 10 hrs prior to sample being taken. Do not consume alcohol 24 hrs before test or cease prescribed medication without consulting your Doctor.

3 simple steps

  • Take the test

    Take the test - either using your kit or visit a clinic.
  • Post your sample

    Send your sample in the freepost pack to our fully accredited lab.
  • Get your results

    Get your doctor reviewed results on
Expert interpretation<br>
of your results

Expert interpretation
of your results

One of our team of doctors will review your results and give you personalised advice based on your medical history, lifestyle and health and fitness goals.

Your personal<br>
health centre

Your personal
health centre

Discover the easy way to track your health through our online portal, View your results with doctor's advice, monitor any changes over time and see the improvements you can make to your health with simple lifestyle changes.

Questions? Let us help

Questions? Let us help

Our customer care team are on-hand to help you find the test that's right for you. Get in touch via phone, live chat or email.

you can trust

Trusted by the NHS and private clinics alike, you can be sure of the highest testing standards from our partner laboratories

What our customers say

We ask every Medichecks customer about their experience - read what they have to say


Our tests are not a substitute for seeing your doctor, especially if you are suffering symptoms. Our doctors will interpret your results based on the information you have provided, but will not diagnose, consult or provide any treatment. You will be advised to see your doctor for any necessary follow-up action.