C-Peptide
A direct readout of how much insulin your pancreas is actually making.
Consider this test if:
- Classifying diabetes type or judging how much beta-cell function remains
- Episodes of low blood sugar, shakiness, sweating, or confusion that need a cause
- Signs of insulin resistance such as weight gain, high triglycerides, or rising fasting glucose
- Already on insulin and wanting to see how much insulin your own pancreas still produces
- Tracking metabolic change over time alongside glucose and A1c
- HSA/FSA eligible
- Typical results in 1 day · Reviewed by a real clinician
- Drawn at a CLIA/CAP-accredited lab near you ·
Pre-test considerations
Overnight fasting is required, so schedule a morning draw and avoid food and caloric drinks beforehand. Note any insulin or glucose-lowering medication you take, since timing affects the result. Water is fine.
Video consult with your Care Team
A 1:1 call to discuss your health.
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What this test is for
C-peptide is released by pancreatic beta cells in equal amounts to insulin, so it tracks your own insulin production better than measuring insulin alone, especially if you take insulin (which assays cannot distinguish from the insulin your body makes). High C-peptide reflects excess insulin output, common in insulin resistance, early type 2 diabetes, and obesity, while low C-peptide points to limited beta-cell function, as in type 1 diabetes or advanced type 2. It is also used to investigate unexplained low blood sugar, where it helps separate an insulin-producing tumor from injected insulin.
This page is the standalone C-peptide measurement. If you want insulin production and insulin resistance read together, the Insulin and C-Peptide Panel pairs both, and the Insulin Resistance Panel with Score adds a calculated resistance score; C-peptide on its own is the right pick when the question is specifically how much insulin your beta cells are secreting.
- Specimen
- Serum or plasma
- Measures
- Mass concentration
What you'll learn
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Insights that connect the dots. A clinician reads your whole picture, not one result in isolation, connecting family history, past results, and lifestyle into clear next steps.
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Your personalized action plan. Nutrition, supplements, and training in one clinician-reviewed protocol, updated as your results change.
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Track your trends. Upload results from any lab and see each biomarker trend over time, so you know what is working.
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Never miss a recheck. Mito tells you what is worth retesting and when, then reminds you so nothing slips.
What to expect
- 1 Book instantly
Click, book, done. Choose a convenient lab location near you. Transparent, up-front pricing.
- 2 Quick lab visit
Testing to fit your busy schedule, usually 15 minutes or less. Walk-in and appointments available.
- 3 Typical results in 1 day
Your results post straight to your dashboard as soon as the lab completes them.
- 4 Expert guidance
Included with Mito membership. A clinician reviews your results and your personalized action plan follows, with clear next steps.
Everything your health needs,
in one membership
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Every test at our cost
Members pay our cost on every test, with lab fees passed straight through. The full receipt is itemized, never padded.
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Continuous tracking, all in one place
Upload past labs and watch your trends over time. Every marker and visit lives in one longitudinal record, so all your care stays together.
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Year-round clinician support
Text anytime and get clinician-reviewed answers. When you want to go deeper, 1:1 consultations are available at affordable rates.
All for $9/month
Order any test or consult without joining. For $9/month, members unlock member prices, trend tracking, and year-round clinician guidance.
Mito Membership
$9 /mo
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Without membership
$0
pay as you go
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Frequently asked questions
View all FAQsHow does pricing work?
Every test shows the member price next to the standard non-member price, so you can see what membership saves you. The member price is our cost, covering the lab and what it takes to run the service. It is never a profit on the test itself. Mito makes its money on the $9 membership, not on marking up your tests. Membership is $9 per month, and any applicable lab order or draw fee is itemized before you pay.
Where do I get tested?
Choose an available partner lab at checkout. If your cart contains multiple blood tests, Mito helps consolidate the eligible tests at one lab when possible. At-home kits and scans follow the collection or appointment process shown on their product page.
Is this eligible for HSA/FSA?
Yes. Eligible tests can be paid for with an HSA or FSA card at checkout.
When will I get my results?
Your results appear in your Mito dashboard after the laboratory completes processing. A clinician then reviews them before your analysis and personalized action plan are finalized. Timing varies by test, and specialty assays and at-home kits may take longer.
Do I need a physician's order?
No. Mito provides the laboratory order when one is required, so you do not need to arrange a separate physician visit before purchasing.
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