What Is a Healthy A1C Level by Age? A healthy A1C level varies depending on age, overall health, and whether a person has diabetes. The A1C test—also called HbA1c—measures the average blood glucose (sugar) levels over the past two to three months. It's an essential marker used by healthcare providers to diagnose prediabetes and diabetes, as well as to monitor how well blood sugar i... https://thewebhealth.com/what-is-normal-hba1c-by-age/