When treating patients with diabetes, a physician seeks to reduce the risk of complications resulting from effects on large and small blood vessels by returning blood pressure, lipid levels, and blood glucose concentrations to normal. In particular, the goal of glycemic control is to reduce such microvascular risks as diabetic nephropathy, diabetic neuropathy, and diabetic retinopathy by keeping glycated hemoglobin (HbA1C) levels below 7%.
Mitka M. Aggressive Glycemic Control Might Not Be Best Choice for All Diabetic Patients. JAMA. 2010;303(12):1137-1138. doi:10.1001/jama.2010.298