Hemoglobin A1b
Hemoglobin A1b is a minor fraction of glycated hemoglobin measured by HPLC.
Category: Diabetes & Glycemic
Also known as: hb a1b
Reference range: 0–2 % (Source: ABIM)
Standard unit: %
High values may indicate
Elevated Hb A1b may occur with hemoglobin variants.
Low values may indicate
Normal levels.
Frequently asked questions
- What is a normal Hemoglobin A1b level?
- A typical reference range for Hemoglobin A1b is 0–2 % (source: ABIM). Reference ranges vary by laboratory, age, and sex, so always compare against the range on your own lab report.
- What units is Hemoglobin A1b measured in?
- Hemoglobin A1b is most commonly reported in %. Labs in different countries may use other units — you can convert between them with BloodId's blood test unit converter.
- Where do Hemoglobin A1b reference ranges come from?
- BloodId uses ABIM standard reference ranges and educational information from MedlinePlus (see our methodology). Reference ranges still vary by lab, age, and sex, so always compare against your own report.
- Can I track Hemoglobin A1b over time?
- Yes. Upload results from any lab and BloodId charts your Hemoglobin A1b over time against its reference range, so you can see whether the trend is rising, falling, or stable.
Related biomarkers
Source: BloodId admin-reviewed
Analyze your Hemoglobin A1b with AI