Interpretation of Combined Insulin and C-Peptide Test Results

Common Patterns

Assessment of Insulin Resistance

Normal value: <2.5; >2.9 indicates insulin resistance.

Interfering Factors and PrecautionsTiming of testing: Fasting or postprandial state must be clearly indicated (postprandial C-peptide is more sensitive in reflecting β-cell reserve).Drug effects: Sulfonylureas stimulate endogenous insulin secretion → insulin ↑ + C-peptide ↑.Insulin injection → insulin ↑ + C-peptide ↓.Sample handling: Avoid hemolysis (affects insulin testing), store at low temperatures (C-peptide is more stable).This article is sourced from: Testing Starry Sky, the views expressed do not represent the platform’s views, and are for public welfare promotion of science, please contact for deletion if there is infringement!