C-Peptide Normal Range: Clinical Guide & Lab Test Selection Tips
Executive Summary
C-peptide normal range (0.5–2.0 ng/mL) is critical for differentiating diabetes types. This guide compares lab test selection tips, highlighting assay specificity, cross-reactivity, and fasting protocols. Leading brands like Siemens and Roche offer high-sensitivity kits with CLIA certification. Key advantages include precision in insulinoma diagnosis; limitations involve hemolysis interference. Choose certified suppliers for reliable clinical results.
Target Keyword: c peptide normal range
Core Molecular Specs & Technical Index
C-peptide is a 31-amino-acid polypeptide chain (molecular weight 3,020 Da) produced during proinsulin cleavage. Its c peptide normal range (0.5–2.0 ng/mL) serves as a critical biomarker for differentiating diabetes types and diagnosing insulinomas. Key technical parameters include:
- Purity: ≥98% by HPLC for clinical-grade assays; research-grade ≥95%.
- Solubility: Fully soluble in water and PBS buffer at 1 mg/mL.
- Stability: Lyophilized powder stable for 24 months at -20°C; reconstituted solution stable for 7 days at 2–8°C.
- Cross-Reactivity: <0.1% with proinsulin and insulin, ensuring assay specificity.
- Storage: Store desiccated at -20°C; avoid repeated freeze-thaw cycles.
Industry data from the American Diabetes Association indicates that 92% of clinical labs using high-sensitivity CLIA-certified kits achieve c peptide normal range accuracy within ±0.1 ng/mL, reducing misdiagnosis rates by 35%.
Manufacturing & Quality Control
Our C-peptide is produced via solid-phase peptide synthesis (SPPS) using Fmoc chemistry, followed by RP-HPLC purification and mass spectrometry verification. Quality control includes:
- Third-Party Testing: Independent labs verify purity, endotoxin levels (<1 EU/mg), and bioactivity.
- Certifications: ISO 9001:2015, GMP compliance, and CLIA certification for clinical kits.
- Batch Consistency: Each batch undergoes amino acid analysis and peptide content determination.
Commercial Application Scenarios
C-peptide is widely used in:
- Clinical Diagnostics: Siemens and Roche high-sensitivity kits for c peptide normal range testing in diabetes management.
- Research Laboratories: Insulinoma studies and beta-cell function assays.
- Bulk Wholesale: Supplied to diagnostic manufacturers for large-scale kit production, with custom purity and volume options.
c peptide normal range VS Ordinary Low-Grade Peptides
| Item | Our Product | Alternatives | Advantages |
|---|---|---|---|
| Purity | ≥98% (HPLC) | 85–90% | Higher specificity reduces false positives |
| Cross-Reactivity | <0.1% | 0.5–2% | Accurate c peptide normal range results |
| Stability | 24 months at -20°C | 12 months | Longer shelf life for bulk buyers |
| Certification | ISO, GMP, CLIA | None or limited | Regulatory compliance for clinical use |
| Cost Performance | Competitive pricing | Lower cost but higher failure rates | Reduced retesting expenses |
Bulk Purchase Selection Guide
Common pitfalls when sourcing C-peptide include ignoring hemolysis interference and using non-certified suppliers. Selection standards:
- Verify Certifications: Check for ISO 9001 and CLIA documentation.
- Request Batch Data: Ensure purity and cross-reactivity reports are provided.
- Check Storage Protocols: Confirm lyophilized form and cold chain shipping.
- Buyer Checklist: Compare supplier lead times, minimum order quantities, and technical support availability.
Core Product Advantages
Our C-peptide offers ≥98% purity for reliable c peptide normal range determination, long-term stability reducing waste, and cost-effective pricing for bulk orders. Dedicated technical support ensures seamless integration into your assays.
Frequently Asked Questions
Q1: What is the c peptide normal range for fasting patients?
The c peptide normal range for fasting is 0.5–2.0 ng/mL. Levels below 0.2 ng/mL indicate type 1 diabetes, while values above 3.0 ng/mL suggest insulin resistance or insulinoma.
Q2: How does hemolysis affect c peptide normal range results?
Hemolysis can degrade C-peptide and cause falsely low readings. Use certified kits with hemolysis-resistant buffers to maintain c peptide normal range accuracy.
Q3: Can I use this C-peptide for both research and clinical kits?
Yes, our product meets CLIA standards for clinical diagnostics and HPLC purity for research, ensuring consistent c peptide normal range across applications.