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What is the significance of the HbA1C Test? – by Dr harold Gunatillake Transcript: It’s one of the commonly used tests to diagnose prediabetes and diabetes and is also the primary test to help you and your health care team manage your diabetes. Higher A1C levels are linked to diabetes complications, so reaching and maintaining your individual A1C goal is crucial if you have diabetes. Sugar (glucose), a primary source of energy to your body, floats in your blood from the carbs you eat, like fuel needed for energy to run your car. The levels fluctuate every minute of your lifetime. Still, the body maintains a normal range through the secretion of two pancreatic hormones, insulin and glucagon. Insulin is released when the glucose level in your blood rise, and glucagon is released when your blood glucose level falls, causing the liver to release stored glucose as glycogen into the ...