A 50-year-old man with fasting blood glucose >140 mg/ dL on two occasions is put on a restricted caloric diet and started on a glucagon-like peptide-1 (GLP-1) receptor agonist. Which of the following laboratory studies is most likely to afford the best method of monitoring disease control in this man?

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Vikas Bhardwaj
Medical Technologist, AIIMS New Delhi
Updated: Apr 17, 2026