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 It Works
Getting your health measured shouldn't be hard! We're here to help you every step of the way.
1
Order a test
Order the private test that suits you and your goals. After ordering, you will receive your referral by email.
2
Collect the sample
Attend one of our 4000+ partner collection centres throughout Australia. Search locations.
3
Receive your results
View all your lab results in your secure health dashboard. Easy!
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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.
Symptoms
Essential for individuals with diabetes, unclear diabetes type, pancreatic concerns, or anyone needing comprehensive insulin production and diabetes assessment.
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.
Dr. Vu Tran Bloody Good’s Chief Medical Officer
Biomarker Tested
No biomarkers found
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.
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.
Your test results will be available in your private dashboard. If there are any urgent issues, we'll let you know so you can follow up with your health professional.
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.
Frequently Asked Questions
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.
