Blood sugar & insulin, explained
Fasting glucose, HbA1c (your 3-month average) and insulin. Together they show insulin resistance years before diabetes.
Three things we do that a printed range doesn’t
Ranges change with both. We use the set for you — 26 range sets in total.
Values change each other’s meaning. We show the links, not just the list.
Endocrine Society, WHO / NICE, Matthews DR et al. (formula). Organisation, document, year.
Fasting glucose — the ranges we use
Per WHO/ADA, persistently elevated glucose is a diagnostic criterion for pre-/diabetes and puts strain on your blood vessels.
| Rating | Range |
|---|---|
| Talk to a doctor | below 3 mmol/L |
| Worth improving | 3 – 3.9 mmol/L |
| Good | 3.9 – 6.1 mmol/L |
| Worth improving | 6.1 – 7 mmol/L |
| Talk to a doctor | 7 mmol/L and above |
Articles in this guide
- Blood biomarkers of metabolic health: what to measure and whyMetabolic health
- Blood sugar and HbA1c: what they mean and how to calm themMarker explained
- How to steady your blood sugar: an action planHow to improve
- Prediabetes: what HbA1c 5.7–6.4 means and how to reverse itMetabolism
- Blood test reference values — table by test for adultsReading your report
- Blood tests before pregnancy: what to check before you conceiveLife stages
- Unexplained weight gain: what to really check in your bloodSymptom → test
- Biological age: what it is and how to slow it downSupplements & longevity
This content is for information only and is not a substitute for medical advice. Talk to your doctor about your results.
Good to know
What does HbA1c 5.9 mean?
Upload your report and you’ll see the answer for your exact value, age and sex — with the source of the range. In general: one value outside the printed range is rarely an emergency; the pattern and the trend matter more.
Do I need a new test?
No. Upload the one you already have. If a re-test is useful, the plan tells you when.
Is this a diagnosis?
No. It is an explanation to help you and your doctor. When a value needs a doctor, we say so.