The Glycated Hemoglobin (HbA1c) test measures the average blood sugar levels over the past two to three months. It indicates how well a person's diabetes is being managed by showing the percentage of hemoglobin proteins in the blood that have glucose attached to them. A higher HbA1c percentage suggests poorer blood sugar control. This test is essential for diagnosing and monitoring diabetes and is typically performed during routine check-ups. The results help healthcare providers make informed decisions about treatment plans and lifestyle changes to improve overall health and reduce the risk of complications associated with high blood sugar levels.