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* This is not a home test kit. You will need to visit a local lab for testing.
Fasting Required: No
Turnaround Time: 2-7 business days
Specimen Type: Blood
Connecting Peptide Insulin, Insulin C-Peptide, Proinsulin C-Peptide
It’s vital to know how much insulin your body is (or isn’t) producing if you have diabetes, hypoglycemia, or a pancreatic tumor. Insulin is necessary to control your body’s blood sugar levels and prevent symptoms such as arrhythmia, dizziness, impaired vision, and fatigue. This is when a C-peptide lab test can help you.
C-peptide is produced in conjunction with insulin and is easier to measure, making it a reliable barometer for tracking insulin levels.
This test is often recommended for people who need a diagnosis of type 1 or type 2 diabetes or want to monitor the effectiveness of their diabetes treatment. It can also be used to help determine if someone has hypoglycemia or pancreatic cancer.
A 12-hour fast is required before testing. You must also avoid alcohol for 24 hours prior to the test day.
While there are some variations among labs, normal results generally range between 0.5 and 2.0 nanograms per milliliter. C-peptide levels below that range mean your insulin levels are insufficient. You may need further diabetes testing to further explore why your C-peptide labs are low.
With more than 400 tests, Personalabs puts the power in your hands. You get the data and information you need to make the decisions that will transform your health. Our process is simple:
Step 1: Explore our test collections online, select the test(s) you want to purchase, and download the lab order. (A doctor won’t need to sign off on testing beforehand, depending on the state you live in.)
Step 2: Find the lab nearest you. We’re affiliated with top-tier companies Labcorp and Quest Diagnostics, giving you access to more than 4,000 labs across America.
Step 3: Bring the test order to the lab and have your blood drawn. (Remember, this test requires fasting.)
Step 4: Check your private Personalabs account within 2 to 10 business days after testing to review your results. And we know there are times when it’s crucial to get answers without a long wait, so reach out to us if you’d like us to contact the lab to deliver your test report by a specific date. Don’t forget that Personalabs offers comprehensive service, which includes telehealth visits with one of our board-certified physicians to discuss your results.
Shop our full range of tests today and discover how you can take the lead in transforming your health.
Provider | LabCorp, Quest |
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Order Your Test
Create an account, choose your tests, checkout securely, generate your lab order
Generate & Print Out Lab Order
Our physician network will approve your order within 2-4hrs.
Visit the Lab
The test price decides which lab you will visit: Quest or Labcorp. Find a location in your area.
Get Your Results
Results can be provided in as little as 24-48 hrs. For more complex tests, please contact us for turn around times.
Based on 2,269 reviews subject to moderation
I use them faithfully. An Excellent service! I great way to manaread more
Review of 5/15/2025, reflecting an experience on 5/12/2025 by Suzanne T
The online test signup was easy, Quest office wait time was minimread more
Review of 5/14/2025, reflecting an experience on 5/11/2025 by Alan W
The reception was very attentive and warm, very fast and professiread more
Review of 5/12/2025, reflecting an experience on 5/9/2025 by Patricia H
Easy to order, quick delivery of order. Prices good whe coupons oread more
Review of 5/12/2025, reflecting an experience on 5/8/2025 by Susan G
makes it easy to manage my health without having to talk to a docread more
Review of 5/10/2025, reflecting an experience on 5/7/2025 by Patrick C
Ordered a test by mistake (no lab order generated) and wasn't fulread more
Review of 5/2/2025, reflecting an experience on 4/14/2025 by Patrina S
Went smoothly
Review of 5/2/2025, reflecting an experience on 4/18/2025 by Harlan K
I live in Massachusetts where most of medical procedures are goveread more
Review of 5/2/2025, reflecting an experience on 4/16/2025 by Helen M
Always quick.
Review of 5/2/2025, reflecting an experience on 4/24/2025 by Joshua T
Easy to find my tests, order, sample, and prompt return of the reread more
Review of 4/19/2025, reflecting an experience on 4/14/2025 by Steven M
Good , but nothing listing what you’re charging for what differenread more
Review of 4/19/2025, reflecting an experience on 4/3/2025 by Rodnet J
The tech was extremely rough with me, physically hurt me and pushread more
Review of 4/19/2025, reflecting an experience on 4/2/2025 by Hank F
Great service provides easy access to routine wellness and other read more
Review of 4/19/2025, reflecting an experience on 4/10/2025 by Brian B
I don't like the fact that I have to have physician approval beforead more
Review of 4/19/2025, reflecting an experience on 4/4/2025 by Patricia S
Very good, I’m very glad with the Service
Review of 4/19/2025, reflecting an experience on 4/5/2025 by Lorena M
I use them faithfully. An Excellent service! I great way to manaread more
Review of 5/15/2025, reflecting an experience on 5/12/2025 by Suzanne T
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Very good, I’m very glad with the Service
Review of 4/19/2025, reflecting an experience on 4/5/2025 by Lorena M