A hemoglobin A1c test (HbA1C) has long been the gold standard for diagnosis and treatment of diabetes. It’s cheap, quick, and easy to interpret.  An A1c of 6.5% or greater is considered diagnostic criteria for diabetes, while 7.0% or less is regarded as controlled once diagnosed. Completed every 3-6 months, A1c is an accessible and affordable way to monitor long term glycemic control.   Yet, A1c often fails to capture the nuance of day-to-day management for so many people living with diabetes. A sleepless night of lows (less than 70 mg/dL) followed by a frantic day of highs (greater than 180…