INS and Hyperglycemia: However, Langouche et al. compared insulin and c-peptide levels between critically ill patients with stress-hyperglycemia randomized to intensive insulin therapy (target BGL 4.4–6.1 mmol/l) or conventional glucose control (target BGL 10–11.1 mmol/l), of whom the majority (approximately 90%) did not have a history of diabetes [8].