Is a hemoglobin A1C fasting?

No, the hemoglobin A1C test does not require fasting. Unlike other blood sugar tests (such as fasting plasma glucose), the A1C test measures your average blood sugar levels over the past 2-3 months. You can take this test at any time of the day, regardless of when you last ate.

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