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Need Help? (888) GET LABS
* 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 2,260 reviews subject to moderation
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 Johnsie O
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
The only problem I have is with the self check-in kiosk. Besides read more
Review of 4/19/2025, reflecting an experience on 4/9/2025 by Dakota H
It’s quick, fast, easy, simple and most importantly discreet !
Review of 4/4/2025, reflecting an experience on 4/1/2025 by Annabel F
A very receptive and friendly employeee.
Review of 4/4/2025, reflecting an experience on 3/31/2025 by Cory H
It was smooth process and easy
Review of 3/31/2025, reflecting an experience on 3/26/2025 by christian R
Very simple and easy to accomplish what you need. Easy schedulinread more
Review of 3/30/2025, reflecting an experience on 3/19/2025 by Ben C
I love how easy it is to order the specific lab tests you need toread more
Review of 3/30/2025, reflecting an experience on 3/18/2025 by Dawn Michelle S
I didn’t get the results i requested
Review of 3/30/2025, reflecting an experience on 3/13/2025 by Latina W
Very thankful for fast attention and the personnel were kind
Review of 3/15/2025, reflecting an experience on 3/12/2025 by Ana Maria W
Very customizable tests, approval from doctors within a couple horead more
Review of 3/13/2025, reflecting an experience on 3/10/2025 by Wassim E
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
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Very customizable tests, approval from doctors within a couple horead more
Review of 3/13/2025, reflecting an experience on 3/10/2025 by Wassim E