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C-Peptide Blood Test

Pancreatic Function

Managing diabetes or blood sugar concerns and want to understand how well your pancreas is naturally producing insulin for optimal metabolic health?

The C-Peptide Blood Test measures how much insulin your body is making by checking C-peptide, a substance released alongside insulin. Low levels can suggest type 1 diabetes or poor insulin production, while higher levels may point to type 2 diabetes, insulin resistance, or pancreatic problems.

You will be emailed a referral to take to your local collection centre. If you ever have any questions, we're here to help.

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How does it work?

Bloody Good is a single portal for ordering, tracking, and reviewing on-demand health testing. Get started with three simple steps:

1
Book your test

Book your test

Choose the testing that suits your goals. After ordering, you will receive your referral by email.

2
Collect your samples

Collect your samples

Have your sample collected at one of our 4000+ partner collection centres.

3
View your results

View your results

View your lab results and receive a personalised review from the secure Bloody Good platform.

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Overview

The C-Peptide test is like having a window into your pancreas's insulin factory to see how well it's actually working. When your pancreas produces insulin – the hormone that helps your body use sugar for energy – it also releases an equal amount of C-peptide, which acts like a reliable fingerprint of your body's natural insulin production. What makes this test so valuable is that C-peptide levels aren't affected by insulin injections, so it gives doctors a true picture of how much insulin your pancreas is making on its own, even if you're already taking insulin medication.

This information is crucial for understanding what type of diabetes you might have and how to treat it most effectively. Low C-peptide levels typically indicate Type 1 diabetes, where your pancreas has stopped making insulin, while normal or high levels usually point to Type 2 diabetes, where your body makes insulin but doesn't use it well. The test also helps doctors determine whether you need insulin therapy, monitor how your pancreas function changes over time, and even investigate unusual blood sugar episodes or suspected pancreatic tumors. Think of it as getting a personalized roadmap for your diabetes care – one that's based on your body's unique insulin-making ability rather than guesswork.

Reviewed by Dr. Vu Tran
Bloody Good’s Chief Medical Officer

You may benefit from the C-Peptide Blood Test

Essential for individuals with diabetes, unclear diabetes type, pancreatic concerns, or anyone needing comprehensive insulin production and diabetes assessment.

Blood sugar spikes after eating Feeling tired after eating Family history of diabetes Prediabetes diagnosis Insulin resistance

How to prepare

Fast for 8-12 hours before testing. Take sample before 10am. Drink only water during fasting period. Avoid training 24-48 hours prior to test.

Understanding results

Results show C-peptide levels compared to normal ranges. Low levels may indicate Type 1 diabetes or beta cell dysfunction requiring insulin therapy.

After the test

Address abnormal C-peptide through appropriate diabetes classification, insulin therapy if needed, beta cell preservation treatments, and comprehensive diabetes management. Work with endocrinologists for complex cases.

Frequently Asked Questions

  • C-peptide is released with insulin from pancreatic beta cells and reflects the body's natural insulin production capacity, crucial for diabetes classification.
  • Low levels typically indicate reduced insulin production, suggesting Type 1 diabetes or advanced Type 2 diabetes with beta cell failure.
  • Type 1 diabetes usually shows very low C-peptide, while Type 2 diabetes often has normal or high levels initially.
  • Levels reflect beta cell function and can decrease with diabetes progression, autoimmune destruction, or pancreatic disease.
  • Treatment focuses on insulin replacement therapy, blood sugar management, and potentially beta cell preservation strategies.
  • In some cases, early intervention and beta cell preservation treatments may help maintain or improve C-peptide production.
Includes Biomarker:

You will be emailed a referral to take to your local collection centre. If you ever have any questions, we're here to help.

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Bloody Good is a single portal for ordering, tracking, and reviewing on-demand health testing.

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Having seen the GP regularly, I thought I had everything covered. I had no idea I had Type II diabetes as I was symptomless. Now I can manage it before it gets really bad. I never would have caught it this early if I hadn't used Bloody Good.

- One Life Club Member, 2024

Frequently Asked Questions

Find answers to common questions about our products and services.

Most collection centres accept walk-ins. Some may require a booking - check details when you click on your chosen location.

If your test needs fasting, we’ll include that in your instructions after you order. Fasting usually means no food for 8–12 hours, but water is fine.

Just your pathology referral form (we email it to you)

Of course. Just maybe don’t bring the friend who faints at the sight of blood.

They’re the highly trained professionals who take your blood sample - with a steady hand and a sharp needle. They love blood, but don’t worry… they’re not vampires. Just legends who make blood tests quick, clean, and (almost) painless.

Some of our tests include Urine, Stool, Saliva and more. Each test will have a clear description on what sample you will need to give and instructions on how.

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