do you have to fast for hgb a1c

No, you do not need to fast before taking the Hemoglobin A1C (HbA1c) test. The A1C test measures your average blood sugar levels over the past 2-3 months, and fasting is not required because it reflects long-term glucose levels rather than a single point in time.

However, your doctor may order additional tests (e.g., cholesterol or fasting glucose) that require fasting. Always confirm with your healthcare provider before the test.