Myths vs facts: HbA1c and stress

HbA1c is a long-term blood glucose marker reflecting average levels over 2–3 months. A common myth is that acute stress directly and quickly raises HbA1c. In reality, acute stress can raise blood glucose via cortisol and adrenaline, but this effect is transient and only appears in HbA1c if stress becomes chronic, leading to sustained hyperglycemia. Another myth is that HbA1c is a direct stress marker. Fact: HbA1c measures glycemic control, not stress hormones. However, chronic stress can indirectly elevate HbA1c through unhealthy coping behaviors (e.g., poor diet, inactivity). Evidence for a direct stress–HbA1c link is moderate, based on observational studies. Clinically, HbA1c is used for diabetes diagnosis and management, not stress assessment. To reduce stress, rely on validated methods like mindfulness or exercise, not HbA1c testing. Caveat: Elevated HbA1c requires medical evaluation, not self-diagnosis.