HOMA-IR
The earliest warning signal for insulin resistance — calculated from your fasting insulin and fasting glucose. Here's what your score means.
HOMA-IR tells you how hard your pancreas is working to keep your blood sugar normal. A high score means your cells are resisting insulin — the first step toward pre-diabetes and type 2 diabetes. It catches problems years before HbA1c or fasting glucose go out of range.
What is this test?
HOMA-IR stands for Homeostatic Model Assessment of Insulin Resistance. It's not a separate blood test — it's a score calculated from two tests you probably already get: fasting insulin and fasting glucose.
HOMA-IR = (Fasting Insulin × Fasting Glucose) ÷ 405
Insulin in µIU/mL, glucose in mg/dL. Both must be from the same fasting blood draw.
The idea is simple: if your glucose is normal but your insulin is high, your pancreas is compensating for resistance. HOMA-IR quantifies that compensation — and gives you a warning years before your glucose or HbA1c actually rise.
What your number means
| HOMA-IR | What it suggests |
|---|---|
| < 1.0 | Excellent insulin sensitivity — optimal |
| 1.0–1.7 | Normal — acceptable insulin sensitivity |
| 1.7–2.5 | Early insulin resistance — time to act |
| 2.5–5.0 | Significant insulin resistance — high diabetes risk |
| > 5.0 | Severe insulin resistance — needs medical attention |
How to lower your HOMA-IR
Resistance training + zone 2 cardio — the single most powerful intervention. Muscle contractions improve insulin sensitivity through GLUT4 translocation independent of insulin.
Aim for 3 strength sessions + 150 min zone 2 cardio per week. Effects are measurable within 4–6 weeks.
- Reduce refined carbs and sugar — directly lowers insulin demand. Switch to whole grains, legumes, and vegetables
- Lose even a small amount of weight — 5–7% body weight loss can cut HOMA-IR by 30–50%
- Try time-restricted eating — an 8–10 hour eating window may improve insulin sensitivity
- Sleep 7–8 hours — one night of poor sleep measurably increases insulin resistance the next day
- Consider berberine — evidence-backed for improving insulin sensitivity, with effects comparable to metformin in some studies
- Magnesium — deficiency impairs insulin signalling. Supplement if your levels are low
Track your metabolic health over time
eterni calculates your HOMA-IR automatically and tracks it alongside HbA1c, fasting glucose, and triglycerides — so you see the full metabolic picture.
Get early accessFrequently Asked Questions
How do I calculate HOMA-IR?
HOMA-IR = (Fasting Insulin in µIU/mL × Fasting Glucose in mg/dL) ÷ 405. For example, if your fasting insulin is 8 µIU/mL and fasting glucose is 90 mg/dL, your HOMA-IR is (8 × 90) ÷ 405 = 1.78. You need both fasting insulin and fasting glucose from the same blood draw.
What is a good HOMA-IR score?
Below 1.0 is ideal and suggests excellent insulin sensitivity. Below 1.7 is acceptable. Between 1.7 and 2.5 indicates early insulin resistance. Above 2.5 indicates significant insulin resistance and higher risk for type 2 diabetes. Above 5.0 suggests severe insulin resistance.
Can you lower HOMA-IR without medication?
Yes — lifestyle changes are the most powerful intervention. Resistance training and zone 2 cardio improve insulin sensitivity within weeks. Reducing refined carbohydrates and sugar lowers insulin demand. Weight loss of even 5–7% significantly reduces HOMA-IR. Time-restricted eating may also help. These interventions often lower HOMA-IR by 30–50%.
Why is HOMA-IR better than fasting glucose alone?
Fasting glucose is a late marker — it stays normal until your pancreas can no longer compensate for resistance. HOMA-IR catches the problem years earlier because it factors in how much insulin your pancreas must produce to keep glucose normal. You can have a perfect fasting glucose of 85 mg/dL while your insulin is working overtime at 15 µIU/mL — that gives a HOMA-IR of 3.3, signalling significant resistance.
Why India needs HOMA-IR
India is the world's diabetes capital — 101 million people with diagnosed diabetes and an estimated 136 million with pre-diabetes. The South Asian phenotype is particularly prone to insulin resistance at lower BMI levels compared to Western populations. HOMA-IR catches this resistance before it progresses to overt diabetes.
- Thin-fat phenotype — many Indians have normal BMI but high visceral fat and significant insulin resistance
- Earlier onset — type 2 diabetes strikes Indians 10–15 years earlier than Westerners on average
- Dietary factors — high refined carbohydrate diets (white rice, maida, sugar) drive insulin demand
- PCOS connection — insulin resistance is a root driver of PCOS, affecting 10–15% of Indian women
The insulin timeline
Understanding how insulin resistance progresses helps you see why HOMA-IR is so valuable:
- Stage 1 — Compensated resistance: Cells resist insulin, but your pancreas increases production to compensate. Glucose stays normal. HOMA-IR rises. Only HOMA-IR catches this.
- Stage 2 — Impaired fasting glucose: Pancreas starts to struggle. Fasting glucose creeps above 100 mg/dL. HbA1c rises to 5.7–6.4%. Most people are still undiagnosed.
- Stage 3 — Type 2 diabetes: Pancreas cannot keep up. Fasting glucose exceeds 126 mg/dL. HbA1c goes above 6.5%. By this point, significant beta-cell damage has occurred.
The goal is to intervene at Stage 1 — and HOMA-IR is the only standard marker that reliably identifies it.
Know what's working. Know what's not.
eterni connects your lab results, supplements, and retests — so you can see the trajectory, not just a snapshot.
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