HbA1c (Glycated Hemoglobin)
HbA1c shows your average blood sugar over the past 2–3 months. It's the gold standard for diagnosing diabetes and tracking long-term glucose control.
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What HbA1c (Glycated Hemoglobin) measures
HbA1c measures the percentage of your hemoglobin that has glucose permanently attached. Because red blood cells live about 3 months, this gives a 90-day average of your blood sugar. Unlike fasting glucose (a snapshot), HbA1c shows the bigger picture.
Normal ranges
Reference ranges may vary slightly by lab. Always use the range provided on your specific test report.
What affects your hba1c (glycated hemoglobin) level
- Consistent diet high in refined carbs and sugar
- Lack of exercise / insulin resistance
- Excess abdominal weight
- Poor sleep and chronic stress
- Genetics and family history
- Certain medications (steroids)
Foods that may help
Non-starchy vegetables
Low glycemic, high fiber, fill you up
Legumes (lentils, chickpeas)
Directly improve HbA1c in studies
Vinegar (before meals)
Apple cider vinegar blunts glucose spikes
Nuts
Healthy fats stabilize blood sugar
Cinnamon
May lower fasting glucose slightly
When to see your doctor
HbA1c at 5.7–6.4% is prediabetes — a warning sign, but usually reversible with diet and exercise. Above 6.5% confirms diabetes and requires ongoing management with a doctor.
Related biomarkers
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Educational content only · Not medical advice