How often should you have your HbA1c measured?
In stable diabetes, measuring twice a year is standard; when values fluctuate or treatment has changed, four times a year is the norm. Discuss the frequency that suits you best with your doctor.
HbA1c is a measure of your average blood sugar over the past two to three months. In diabetes, it is a cornerstone of routine monitoring, because the risk of complications is strongly linked to how high this number remains over the long term.
How often you have it measured depends on how stable your blood sugar is. When diabetes is well controlled with a stable treatment plan, two measurements per year is generally sufficient. If your treatment changes, or if your values fluctuate, four times per year is more common. These are the standard frameworks used in practice, confirmed by reviews on diabetes management.
In practice, far from everyone reaches the target value. A large German registry study showed that only 27% of people with type 1 diabetes and 44% of those with type 2 diabetes achieved an HbA1c below 7.0%, despite active treatment. Measuring regularly helps to detect deviations early and to adjust your treatment accordingly.
If you are pregnant, HbA1c also plays a role from an early stage. Measured around the fifteenth to twentieth week, it can, together with other measures, signal an increased risk of gestational diabetes. Your midwife or gynaecologist decides whether and when measuring is useful in your situation.
The frequency that suits you best is determined together with your doctor, depending on your type of diabetes, how stable your control is, and whether there are special circumstances such as pregnancy or a change in medication.
Based on two reviews on diabetes management and HbA1c as a diagnostic tool (PMID 24205486, 37473453), a registry study in people with diabetes and chronic kidney disease in Germany (PMID 34011313), a study on HbA1c in early pregnancy (PMID 37075929), and a study on testing frequency during the COVID-19 pandemic in South Korea (PMID 39439171).
What is a healthy HbA1c value?
In healthy adults, a normal HbA1c falls between roughly 4.79% and 6.15%, with an average of 5.47%. If your value is above this, discuss it with your general practitioner to rule out prediabetes or diabetes.
How do you lower a high HbA1c?
Several medications demonstrably lower HbA1c: the weekly semaglutide injection has the strongest evidence base, but oral combinations involving empagliflozin or semaglutide also offer good evidence. Discuss with your doctor which option suits your situation, side-effect profile and reimbursement coverage.
Can your HbA1c also be too low?
An HbA1c below 5.0% is associated with an increased risk of death in people without diabetes, although this is likely a signal of an underlying condition. Always have a strikingly low value investigated by your doctor.
What does your HbA1c tell you about your risk of diabetes and ageing?
An elevated HbA1c, even well below the official diabetes threshold, is associated with a greater risk of diabetes, kidney damage, eye complications and possibly dementia. Have your HbA1c checked regularly and discuss with your doctor what a healthy target value is for you.
How do I know if my blood sugar is healthy (prediabetes)?
Prediabetes can be measured reliably, but no single blood test provides complete certainty on its own. If in doubt, have multiple values measured and discuss with your doctor whether a lifestyle programme or medication is worthwhile, because that difference has been proven to matter.
How do you measure insulin resistance?
There is no single best method for everyone: the clamp is the most accurate but is only feasible in a specialised setting. For practical use, HOMA or QUICKI from a fasting blood draw are a reasonable starting point, provided the result is compared against population-specific norms.