C-Peptide

Byproduct of insulin production

2/22Providers

Metabolic HealtCategory

0.5-2.0 ng/mLReference

Limited Availability

2 providers include this

Reference Range

0.5-2.0 ng/mL

What is C-Peptide?

Byproduct of insulin production

Why It Matters

Measures how much insulin your pancreas produces. Unlike insulin tests, not affected by insulin injections. Distinguishes Type 1 from Type 2 diabetes. Indicates beta cell function.

Reference Range: 0.5-2.0 ng/mL

Which Providers Test C-Peptide?

Full Provider Comparison

Provider	Includes	Annual Cost	Biomarkers
Superpower	—	$199	100+ (150 with ratios)
WHOOP Advanced Labs	—	$349	65
Labcorp OnDemand	—	$398	30+
Life Extension	—	$486	40+
Everlywell	—	$468	83
Mito Health	—	$349	100+
InsideTracker	—	$680	48
Function Health	✓	$499	100+
Marek Health Base	—	$250	45+
Marek Health Comprehensive	—	$495	70+
Marek Health Complete	—	$895	100+
Marek Health Executive	—	$1950	150+
Blueprint Advanced	—	$1150	110
Quest Health	—	$Varies	75+
Empirical Health	—	$190	85+
Oura Health Panels	—	$99	50
SiPhox Health	—	$125	60
Hims Labs Base	—	$199	50
Hims Labs Advanced	—	$499	120+
Healthspan	—	$349	80+
Vitality Blueprint Standard	—	$375	85
Vitality Blueprint Elite	✓	$700	129

Ready to Test C-Peptide?

2 providers include this biomarker in their panels

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Frequently Asked Questions

What does C-Peptide test for?

C-Peptide is a metabolic health / glucose biomarker. Byproduct of insulin production The normal reference range is 0.5-2.0 ng/mL.

Which providers include C-Peptide?

2 of 22 providers include this test:Function, Vitality Elite.

How often should I test C-Peptide?

For most people, testing 2-4 times per year is recommended to establish baseline levels and track trends. Consult your healthcare provider for personalized recommendations.

What is the optimal range?

The standard reference range is 0.5-2.0 ng/mL. Many functional medicine practitioners recommend tighter optimal ranges for peak health. Your ideal range may vary based on age, sex, and health goals.

Why is C-Peptide important?

Measures how much insulin your pancreas produces. Unlike insulin tests, not affected by insulin injections. Distinguishes Type 1 from Type 2 diabetes. Indicates beta cell function.

Medical Disclaimer

This information is for educational purposes only and is not medical advice. Always consult with a qualified healthcare provider about your specific health needs.