INS and hyperinsulinism: Therefore, the presence of a very high fasting insulinemia (190 mIU/L, RV: 5–25) in contrast to a normal blood C-peptide level (4.5 μg/L on Architect i2000, RV: 0.8–5.2; Table 1) raised the question of hidden injections of insulin analogs not admitted by the patient (exogenous hyperinsulinemia).