What's this test for?

This test is ideal if you're experiencing unexplained blood sugar swings, unusual episodes of low blood sugar, or if you've been told you have diabetes but aren't sure which type. It's also useful if you've had an islet cell or pancreas transplant and need to check how well it's working. The test looks at how your body makes insulin over time after a glucose challenge, which helps clarify what's going on with your blood sugar control.

What's included in this test?

This is a 7-specimen series that measures C-Peptide at multiple time points during a glucose tolerance test. C-Peptide is a byproduct made when your body produces its own insulin, so tracking it over time shows how your pancreas responds to sugar intake, which is more reliable than measuring insulin directly since C-Peptide holds up better in the blood sample.

What happens after I get my results?

Your results will show up in your account with each C-Peptide value explained alongside its normal range so you can see exactly where you stand at each time point. Depending on the pattern, next steps might include working on diet and activity habits that support steady blood sugar, or retesting down the road to track changes. If any value comes back extremely low or high alongside severe symptoms like fainting or confusion, seek medical care right away. You can download the full lab report from your account anytime, and the trends feature lets you compare results if you test again in the future.

How can I naturally support healthy insulin response?

Eating balanced meals with fiber, protein, and healthy fats instead of a lot of refined carbs can help keep insulin demands more steady. Regular movement, especially after meals, helps your muscles use blood sugar more efficiently. Getting enough sleep and managing stress also play a real role, since poor sleep and high stress hormones can throw off blood sugar regulation. These habits support your body's natural insulin response, though they don't replace medical treatment if you have diagnosed diabetes.

When will I get my results?

Results for this test are typically ready within about 7 days of your final specimen collection. Because this is a multi-specimen series collected over a period of time during the glucose tolerance process, the lab needs to process all the samples together before your report is finalized. You'll get a notification once everything is ready to view in your account.

Who should consider this test?

This test is a good fit for people newly diagnosed with diabetes who want clarity on whether it's type 1 or type 2, since the treatment approach differs. It's also useful for anyone with recurring low blood sugar episodes where the cause isn't clear, or for those monitoring a pancreas or islet cell transplant. People undergoing a glucose tolerance test who want a more detailed picture of their insulin response may also benefit.

What symptoms indicate I may need this test?

Watch for symptoms like shakiness, sweating, or confusion between meals, which can point to low blood sugar episodes. Unexplained weight loss, excessive thirst, and frequent urination can signal blood sugar problems that need a closer look. If you've been diagnosed with diabetes but your symptoms or response to treatment don't quite match the typical pattern, this test can help sort out what type you actually have.

What does a high C-Peptide result mean?

A high C-Peptide level generally means your pancreas is producing a lot of insulin, which can happen with insulin resistance often seen in type 2 diabetes, or in some cases with an insulin-producing tumor. It can also show up if you have high blood sugar that your body is trying hard to manage. Simple habits like reducing added sugar, increasing physical activity, and maintaining a healthy weight can help improve how your body uses insulin over time.

What does a low C-Peptide result mean?

A low C-Peptide level usually means your pancreas isn't making much of its own insulin, which is common 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 come with C-Peptide attached. If your levels are very low along with symptoms like extreme fatigue or rapid weight loss, seek medical care promptly.

How often should I retest?

If you're using this test to monitor a transplant or track how a treatment plan is working, retesting every few months can help you see meaningful trends. If your initial results were within a normal range and you're not experiencing new symptoms, retesting once a year or as part of a routine check-in is usually enough. Anyone with significant symptom changes should consider retesting sooner rather than waiting for a scheduled check-in.

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, 7 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