HbA1c (IFCC): what your result means.

Glycated haemoglobin in IFCC standardised units (mmol/mol). Reflects average blood glucose control over the preceding 8–12 weeks. HbA1c (IFCC) is measured by blood test as part of the Metabolic panel in the HodieLabs Health Blueprint.

Why HbA1c (IFCC) matters

IFCC units (mmol/mol) are the international standard. Many Australian labs now report both IFCC and NGSP (%). Conversion: IFCC (mmol/mol) = (NGSP% - 2.15) x 10.929. For example, 5.7% NGSP = 39 mmol/mol IFCC.

Associated risks when out of range: Type 2 diabetes. Cardiovascular disease. Microvascular complications. Insulin resistance.

Evidence basis

The HodieLabs Evidence-Based Clinical Library classifies HbA1c (IFCC) as an strong evidence-tier biomarker. Its reference ranges come from a published authority standard rather than from observational optimisation targets. The standard used here is ADA 2024 Standards of Care in Diabetes (IFCC standardisation); <39 mmol/mol normal, 39–47 prediabetes, >=48 diabetes. IFCC and NGSP (%) units are mathematically interconvertible: IFCC = (NGSP - 2.15) x 10.929. Where relevant clinical outcomes are noted on this page, they reflect the guideline literature referenced below.

Evidence-based reference ranges

The HodieLabs Evidence-Based Clinical Library interprets HbA1c (IFCC) against published clinical authority standards, never arbitrary "optimal" ranges. Measured in mmol/mol:

Clinical interpretation

• IFCC units (mmol/mol) are the international standard. Many Australian labs now report both IFCC and NGSP (%).
• Conversion: IFCC (mmol/mol) = (NGSP% - 2.15) x 10.929. For example, 5.7% NGSP = 39 mmol/mol IFCC.
• Observational longevity target: <36 mmol/mol (equivalent to <5.4% NGSP) is associated with better metabolic outcomes in observational studies, but is not an ADA-endorsed target for the general population.

What improves it: the evidence-based levers

• Reduce refined carbohydrates
• Increase physical activity
• Weight management
• Consider metformin if persistent prediabetes

Recommended testing frequency: 6-monthly if borderline, annually if in reference range, as part of a comprehensive panel. Single markers are always interpreted in context.

How HbA1c (IFCC) testing works at HodieLabs

HbA1c (IFCC) is measured in every Health Blueprint at our Melbourne Preventative Health & Longevity Clinic, interpreted by a doctor against the guideline-cited ranges above and tracked over time through your HodieLabs membership.

References

1. ADA 2024 Standards of Care in Diabetes (IFCC standardisation); <39 mmol/mol normal, 39–47 prediabetes, >=48 diabetes. IFCC and NGSP (%) units are mathematically interconvertible: IFCC = (NGSP - 2.15) x 10.929.

This page is general information from the HodieLabs Evidence-Based Clinical Library, not medical advice. Speak with your GP about what testing and care is appropriate for you.