The C-Peptide Response to Glucose, 4 Specimens test contains 1 test.
C-Peptide is useful in distinguishing insulin-secreting tumors, i.e., insulinomas, from exogenous insulin administration. C-Peptide concentrations are severely depressed or absent in Type 1 diabetes mellitus. C-Peptide is also useful in monitoring patients who have received islet cell or pancreatic transplants. It is also measured as an additional means for evaluating glucose tolerance and glibenclamide-glucose tests.