HOMA-IR: what your result means.

A calculated index of insulin resistance from fasting glucose and insulin. HOMA-IR is measured by blood test as part of the Metabolic panel in the HodieLabs Health Blueprint.

Why HOMA-IR matters

HOMA-IR = (fasting insulin x fasting glucose) / 22.5 (when insulin in mU/L and glucose in mmol/L). The <1.5 target reflects observational literature on optimal insulin sensitivity. It is useful for metabolic coaching but is not a formal society-endorsed diagnostic threshold.

Associated risks when out of range: Gold-standard surrogate for insulin resistance in clinical practice, HOMA-IR >2.5 indicates significant insulin resistance. Predicts progression to type 2 diabetes years before HbA1c becomes abnormal.

What the clinical evidence shows

The evidence base behind how the HodieLabs Evidence-Based Clinical Library interprets HOMA-IR, from randomised trials, prospective cohorts and genetic (Mendelian randomisation) studies. Full citations in the reference list below.

• Original derivation (Matthews et al. Diabetologia 1985): HOMA-IR was validated against gold-standard clamp measurements of insulin resistance, making formal insulin-resistance assessment possible from a simple fasting blood sample.
• Whitehall II cohort (Tabák et al. The Lancet 2009): insulin sensitivity declined steeply at least five years before diabetes diagnosis, the deterioration HOMA-IR is designed to catch while fully reversible.

Evidence-based reference ranges

The HodieLabs Evidence-Based Clinical Library interprets HOMA-IR against published clinical authority standards, never arbitrary "optimal" ranges. Measured in index:

Clinical interpretation

• HOMA-IR = (fasting insulin x fasting glucose) / 22.5 (when insulin in mU/L and glucose in mmol/L).
• The <1.5 target reflects observational literature on optimal insulin sensitivity. It is useful for metabolic coaching but is not a formal society-endorsed diagnostic threshold.
• Values >2.5 are widely considered consistent with insulin resistance across multiple studies.

What improves it: the evidence-based levers

• Calculate as (fasting insulin × fasting glucose) / 22.5
• Lifestyle intervention is first-line: weight loss, exercise, carb reduction, sleep optimisation

Recommended testing frequency: Annual, as part of a comprehensive panel. Single markers are always interpreted in context.

How HOMA-IR testing works at HodieLabs

HOMA-IR 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. Matthews DR, et al. Homeostasis model assessment: insulin resistance and beta-cell function from fasting plasma glucose and insulin concentrations in man. Diabetologia. 1985;28:412–419.
2. Tabák AG, et al. Trajectories of glycaemia, insulin sensitivity, and insulin secretion before diagnosis of type 2 diabetes (Whitehall II). Lancet. 2009;373:2215–2221.

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.