HbA1c
The percentage of hemoglobin with glucose attached, reflecting average blood sugar over the prior 2 to 3 months. Optimal range: Below 5.7% is normal; 5.7-6.4% is prediabetes; 6.5% and above is diabetes.
What it measures
The percentage of hemoglobin with glucose attached, reflecting average blood sugar over the prior 2 to 3 months. The standard diagnostic test for prediabetes and diabetes.
Why it matters
HbA1c predicts diabetic complications, cardiovascular risk, and mortality on a continuous gradient. Keeping it low without hypoglycemia is a core longevity lever.
Optimal ranges
Sourced targets, not just lab reference ranges. Lab ranges describe the population; these describe where the evidence says you want to be.
| Range | Context |
|---|---|
| Below 5.7% is normal; 5.7-6.4% is prediabetes; 6.5% and above is diabetes | American Diabetes Association diagnostic categories (Harvard Health summary). |
How to improve it
- 1
Reduce refined carbs and added sugars
- 2
Post-meal walks to blunt glucose spikes
- 3
Resistance training to increase glucose disposal
- 4
Lose excess weight, especially visceral fat
Connected to
Goals
Ingredients
Longevity Lab Report
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Educational information, not medical advice. Talk to your doctor before acting on any biomarker result.