HOMA-IR (Insulin Resistance Score)
HOMA-IR (Homeostatic Model Assessment of Insulin Resistance) is a calculated score using fasting glucose and fasting insulin together. It estimates how resistant your cells are to insulin's effects. The formula is (fasting glucose × fasting insulin) ÷ 405 (in mg/dL units).
Normal Range
Optimal: < 1.0; Acceptable: 1.0–1.9; Insulin resistance: 1.9–2.9; Significant: > 2.9
Reference ranges may vary slightly between laboratories. Always interpret your result in context with your doctor.
Why is HOMA-IR measured?
HOMA-IR is one of the most useful early-warning markers of metabolic dysfunction. It detects insulin resistance years before glucose, HbA1c, or weight changes appear abnormal — making it valuable for cardiovascular and diabetes risk prediction.
High HOMA-IR means…
HOMA-IR above 1.9 indicates insulin resistance — your body is overproducing insulin to keep glucose normal. Scores above 2.9 are significant and predict elevated risk of type 2 diabetes, fatty liver, hypertension, and cardiovascular disease.
Low HOMA-IR means…
A HOMA-IR below 1.0 indicates excellent insulin sensitivity. This is the metabolic state associated with the lowest risk of type 2 diabetes and cardiovascular disease.
Symptoms associated with abnormal HOMA-IR
When HOMA-IR is high:
- Difficulty losing weight despite efforts
- Energy crashes after high-carb meals
- Persistent belly fat
- Sugar cravings
- Skin darkening at neck, armpits, or groin (acanthosis nigricans)
- Irregular menstrual cycles
When HOMA-IR is low:
- No symptoms — represents optimal metabolic health
How to improve your HOMA-IR
- Resistance training is the most effective single intervention for HOMA-IR — even 2 sessions per week improves the score within 8 weeks.
- Reducing added sugars and ultra-processed foods often drops HOMA-IR within 4–6 weeks.
- A 5–10% body weight loss can halve HOMA-IR in many people.
- Some people benefit from a low-glycaemic-index diet or time-restricted eating; trial different patterns and retest.
Frequently asked questions about HOMA-IR
Why is HOMA-IR more useful than glucose alone?
Insulin resistance can be present for 5–10 years before glucose climbs into the pre-diabetic range. HOMA-IR catches this hidden metabolic dysfunction early, when lifestyle change is most effective.
Is HOMA-IR available from my regular blood test?
It is calculated, not directly measured — your lab needs to report fasting glucose AND fasting insulin together. Not all routine panels include fasting insulin, so you may need to ask for it specifically.
Medical Sources
This page is for informational purposes only and does not constitute medical advice. Always consult a qualified healthcare provider about your individual results.