What's this test for?

This test is ideal if you're experiencing unexplained blood sugar swings, have been told you might have diabetes, or need to figure out whether your pancreas is still making its own insulin. It's also useful if you've had unexplained episodes of low blood sugar and need to find out what's causing them. Doctors also use this test to check how well a pancreas or islet cell transplant is working.

What happens after I get my results?

Your results will appear in your account with each C-Peptide value explained alongside its normal range so you know exactly where you stand. If your levels are outside the expected range, next steps usually include repeating the test alongside a glucose check, adjusting diet and activity, or seeking care quickly if you're having symptoms of very low or very high blood sugar. You can download a standard lab report straight from your account at any time. Since this test involves multiple specimens over time, you can also use the trends feature to see how your C-Peptide levels change across each collection point.

Who should consider this test?

Anyone recently diagnosed with diabetes who wants to know if it's type 1 or type 2 should consider this test, since it shows whether the pancreas is still producing insulin. It's also a smart choice for people with unexplained low blood sugar episodes, or those who have had an islet cell or pancreas transplant and want to track how well it's functioning. People already doing a glucose tolerance test may also have this added since C-Peptide holds up better in the blood sample than insulin itself.

What symptoms indicate I may need this test?

Symptoms like shakiness, sweating, confusion, or fainting spells that come from low blood sugar are a common reason to check C-Peptide. Frequent thirst, fatigue, blurry vision, and unexplained weight changes tied to blood sugar problems are other signs worth investigating. If you've already been diagnosed with diabetes but your treatment doesn't seem to match how your body is responding, this test can help clarify what's really going on.

How can I naturally support healthy blood sugar and pancreas function?

Eating balanced meals with fiber, protein, and healthy fats instead of refined carbs and sugary drinks helps keep blood sugar steadier throughout the day. Regular physical activity, like a daily walk or strength training, helps your body use insulin more effectively. Getting enough sleep and managing stress also matter, since poor sleep and high stress hormones can throw off blood sugar control. These habits support overall pancreas health but don't replace medical treatment if you've been diagnosed with a blood sugar condition.

When will I get my results?

Results for this test are typically ready within about 7 days of your last specimen collection. Since this test involves 5 separate specimens, the full result set becomes available once all samples have been processed. You'll get a notification as soon as your results are ready to view in your account.

What does high C-Peptide mean?

A high C-Peptide level usually means your pancreas is making plenty of insulin, which can happen with insulin resistance, early type 2 diabetes, or certain rare insulin-producing tumors. It can also show up if your kidneys aren't clearing insulin byproducts as efficiently as they should. Simple next steps include cutting back on refined sugar and carbs, increasing physical activity, and retesting to see if the pattern holds.

What does low C-Peptide mean?

A low C-Peptide level often means your pancreas isn't producing much insulin on its own, which is typical in type 1 diabetes or in later-stage type 2 diabetes where the pancreas has worn out. It can also appear if you're taking insulin injections, since injected insulin doesn't carry C-Peptide with it. If your level comes back low and you're having symptoms of high blood sugar, it's a good idea to seek care and discuss insulin needs promptly.

What causes abnormal C-Peptide levels?

High levels are often tied to insulin resistance, obesity, early type 2 diabetes, or in rare cases an insulin-secreting tumor. Low levels are commonly caused by type 1 diabetes, long-standing type 2 diabetes, or pancreas damage from conditions like pancreatitis. Certain medications and recent changes in diet or activity can also shift your C-Peptide reading, which is part of why this test uses 5 specimens to capture a fuller picture over time.

How often should I retest?

If you're monitoring a known condition like diabetes or a pancreas transplant, retesting every 3 to 6 months is common to track how things are trending. If you just had an abnormal result, a repeat test within a few weeks can help confirm the pattern before making any changes. Your retesting schedule should match how quickly your specific situation is changing.

Getting your blood test with us is easy, private & backed by the power of science.Long story short: In the test options, use the filters or search box to narrow your choices and find the test you want. If you need a hand navigating through options, text our super friendly support team at 754-799-7833, and we'll provide tailored suggestions to help you find the ideal test. Once your order is placed, we’ll create your doctor’s lab order remotely, without any need for you to make a trip to a doctor in person or to talk to the doctor. Expect to receive your doctor’s lab order right in your inbox. It will also be in your patient portal if you need to find it later. We’ll also include instructions regarding fasting and other requirements for your test. Your patient portal will be auto-created hassle-free during checkout. If this is your first time ordering, you'll be prompted to create a password for instant login access to your patient portal. It's a quick way to conveniently access your orders and results whenever you want. When you’re ready, visit one of our 4,000 locations. Just bring your ID – no printing or faxing of your lab order is needed, as your order and details will already be in the lab system. Note that most lab locations don’t accept walk-ins, so it’s best to book an appointment in advance. Don’t worry – we’ll provide detailed instructions along the way. You’ll get your results via email & SMS and dive into understanding your body better. Yup, that easy! If you have any questions, please text us at 754-799-7833 or email support@privatemdlabs.com and we'll gladly help you.

How do I know which test to get?

In the test options, find the test you want. If you’re not sure which test to get, we can lend a hand in finding the right option. Just text or call us at 754-799-7833, email us at support@privatemdlabs.com, and we'll gladly help you. We've got your back and reply quickly.

When will my lab results be available?

Most test results will be available within 1–3 business days. Once they're ready, we'll send an email and text message to let you know. After your blood draw, just hang tight and don't worry – we'll keep you updated and in the loop! If you have any further questions, please text us at 754-799-7833 or email support@privatemdlabs.com, and we'll gladly help you.

Is it possible to make changes to my lab order if I made a mistake with the name, date of birth, or any other details?

Absolutely! We totally understand that errors can happen. No worries, we're here to help you. Just reach out to us via text at 754-799-7833 or shoot us an email at support@privatemdlabs.com. Remember to include your order number and let us know the correct information you’d like to update. Our awesome team will jump right in and make sure everything is sorted out and accurate for you. There are no changes necessary if your address is wrong on the requisition though. We don’t mail anything out. Our lab requires an address to be listed to generate an order.

Do you accept health insurance?

Only HSA & FSA is accepted. Our services are strictly self-pay and cannot be submitted to your health insurance provider except for Health Savings Accounts or Flexible Savings Accounts. This policy applies to all insurance companies, including federal health insurance programs like Medicare. If you have any questions, please text us at 754-799-7833 or email support@privatemdlabs.com.

Can I cancel my order?

Yes. We get it – sometimes your needs change. As long as your samples haven’t been collected yet, we’re happy to help you cancel your order. If you have any further questions, please text us at 754-799-7833 or email support@privatemdlabs.com. You can read more about our cancellation policy here.

How can I find a lab location near me?

During the ordering process, you’ll be able to select a specific lab near you, with no strings attached! You can switch it up later easily and visit any of our authorized locations as long as it’s the same lab company you selected your test for (Quest Diagnostics or Labcorp). Before you proceed with your order, feel free to browse through all our lab locations here. This will give you the peace of mind of knowing that there's a lab nearby your home, office or your favorite gym. If you have any questions, please text us at 754-799-7833 or email support@privatemdlabs.com and we'll gladly help you.

C-Peptide Test - Diabetes Type & Pancreas Function

Getting your blood test with us is easy, private & backed by the power of science.

Long story short:

In the test options, use the filters or search box to narrow your choices and find the test you want.
If you need a hand navigating through options, text our super friendly support team at 754-799-7833, and we'll provide tailored suggestions to help you find the ideal test.
Once your order is placed, we’ll create your doctor’s lab order remotely, without any need for you to make a trip to a doctor in person or to talk to the doctor. Expect to receive your doctor’s lab order right in your inbox. It will also be in your patient portal if you need to find it later. We’ll also include instructions regarding fasting and other requirements for your test. Your patient portal will be auto-created hassle-free during checkout.
If this is your first time ordering, you'll be prompted to create a password for instant login access to your patient portal. It's a quick way to conveniently access your orders and results whenever you want.
When you’re ready, visit one of our 4,000 locations. Just bring your ID – no printing or faxing of your lab order is needed, as your order and details will already be in the lab system.
Note that most lab locations don’t accept walk-ins, so it’s best to book an appointment in advance. Don’t worry – we’ll provide detailed instructions along the way.
You’ll get your results via email & SMS and dive into understanding your body better. Yup, that easy!

754-799-7833

[email protected]

C-Peptide Test - Pancreas Function & Diabetes Type Check

C-Peptide Response to Glucose, 5 Specimens

Prescription & all lab fees included

Doctor's guidance included

Fast & convenient

Prescription & all lab fees included

Doctor's guidance included

Fast & convenient

What's this test for?

What happens after I get my results?

Who should consider this test?

Here’s why 1,000,000+ customers chose us for affordable hassle-free private blood testing.

Find a lab near you

C-Peptide Test - Pancreas Function & Diabetes Type Check

Prescription & all lab fees included

Doctor's guidance included

Fast & convenient

1,000,000+ blood tests later, here's what our customers say