do you have to fast for a hgb a1c

No, you do not need to fast before taking a 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.