Higher fasting insulin but lower fasting C‐peptide levels in African Americans in the US population

Fasting serum insulin and fasting serum C-peptide are risk factors for developing type 2 diabetes. Because of the higher incidence of type 2 diabetes in African Americans and Hispanic Americans, it is likely that these groups may differ from non-Hispanic whites in their levels of insulin and C-peptide.We analyzed data from a nationally representative sample of adults in the US population for whom sociodemographic, clinical, and laboratory...