What's this test for?

This test is ideal if you're experiencing unexplained blood sugar swings, unexplained low blood sugar episodes, or if you've been told you have diabetes but aren't sure which type. It helps figure out whether your pancreas is still making insulin on its own or whether something else is causing your symptoms. It's also useful if you've had an islet cell or pancreas transplant and need to check how well it's working.

What's included in this test?

This is a two-specimen C-Peptide test, meaning your blood is drawn at two different points around a glucose challenge to see how your body responds. Looking at the change between the two results gives a clearer picture of how well your pancreas is producing insulin than a single measurement alone, which matters when trying to sort out different causes of blood sugar problems.

What happens after I get my results?

Your results will show up in your account with each value explained alongside its normal range, so you can see exactly where you fall. Depending on what your numbers look like, next steps might include adjusting your diet, working on your activity level, or retesting after a set glucose load to see how your body responds. A downloadable standard lab report is available in your account any time, and you can use the trends feature to track your C-Peptide levels over multiple tests to see patterns over time.

How can I naturally support healthy insulin function?

Eating balanced meals with fiber, protein, and healthy fats instead of large amounts of refined carbs can help keep insulin demand steadier throughout the day. Regular movement, even a daily walk, helps your body use insulin more efficiently. Getting consistent sleep and managing stress also play a real role, since poor sleep and high stress hormones can throw off blood sugar control.

When will I get my results?

Results are typically ready within about 7 days of your blood draw. Once they're finalized, you'll be able to log into your account to view them, along with an explanation of what each number means.

Who should consider this test?

This test is a good fit for people recently diagnosed with diabetes who want clarity on whether it's type 1 or type 2, people with unexplained low blood sugar episodes, and anyone monitoring an islet cell or pancreas transplant. It's also useful if you're on insulin therapy and there's a question about how much insulin your own body is still making versus what's coming from injections.

What symptoms indicate I may need this test?

Symptoms like frequent shakiness, confusion, or sweating from low blood sugar, unexplained weight changes, extreme thirst, or fatigue that doesn't improve can all point to a need for this test. If you've been diagnosed with diabetes but your treatment doesn't seem to match how your body is responding, that's also a sign this test could help clarify things.

What does high C-Peptide mean?

A high C-Peptide level usually means your pancreas is producing more insulin than normal, which can happen with insulin resistance, early type 2 diabetes, or in rare cases an insulin-producing tumor. It's worth looking at alongside your blood sugar levels, since high insulin with normal or high sugar often points toward insulin resistance. Cutting back on refined sugars and increasing physical activity are practical first steps while you figure out next moves.

What does low C-Peptide mean?

A low C-Peptide level often means your pancreas isn't making much insulin on its own, which is typical in type 1 diabetes or in later-stage type 2 diabetes where insulin production has dropped off. If your levels are very low along with high blood sugar, this is something to address quickly, since it may mean your body needs insulin support. Tracking your levels over time with retesting can help show whether pancreatic function is declining, stable, or improving.

How often should I retest?

If you're actively monitoring a transplant, adjusting diabetes treatment, or investigating unexplained low blood sugar, retesting every few months is common until things stabilize. Once your levels are steady and your symptoms are under control, retesting once or twice a year is usually enough. Any time you notice new or worsening symptoms, it's a good idea to retest sooner rather than waiting.

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 Glucose Response Test - Diabetes Type Check

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 Glucose Response Test for Diabetes Evaluation

C-Peptide Response to Glucose, 2 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's included in this test?

What happens after I get my results?

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

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C-Peptide Glucose Response Test for Diabetes Evaluation

Prescription & all lab fees included

Doctor's guidance included

Fast & convenient

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