Is my HOMA-IR (Insulin Resistance Index) normal?
Free blood test checker · Standard + longevity-optimal ranges
What is a normal HOMA-IR level?
HOMA-IR (Homeostatic Model Assessment of Insulin Resistance) is the gold standard calculator for insulin resistance. Formula: (Fasting Glucose in mg/dL × Fasting Insulin in µIU/mL) / 405. Its superiority over fasting glucose alone lies in catching hyperinsulinemia before glucose rises — the body compensates for insulin resistance by producing more insulin, keeping glucose normal while metabolic damage accumulates silently. Optimal HOMA-IR is below 1.0. Below 1.5 is healthy. Above 2.0 indicates insulin resistance. Above 2.5 is a critical threshold strongly associated with metabolic syndrome. HOMA-IR detects insulin resistance 5-10 years before fasting glucose or HbA1c become abnormal.
| Range | Values |
|---|---|
| Standard Reference | 0–1 |
| Longevity Optimal | < 1.0 |
| High Risk | > 2.5 |
What causes abnormal HOMA-IR levels?
Elevated HOMA-IR (insulin resistance) is caused by excess visceral fat (the primary driver), sedentary lifestyle, high refined carbohydrate and sugar intake, chronic sleep deprivation (even 4-5 nights of poor sleep measurably increases insulin resistance), chronic stress (cortisol elevates glucose), genetic predisposition, and certain medications (corticosteroids, antipsychotics). Muscle loss (sarcopenia) also worsens insulin resistance because skeletal muscle is responsible for ~80% of insulin-mediated glucose disposal.
When should you see a doctor?
See your doctor if HOMA-IR is above 2.0, especially if combined with other metabolic risk factors (high triglycerides, low HDL, elevated waist circumference, elevated blood pressure). Above 2.5 strongly indicates metabolic syndrome. Request fasting insulin alongside glucose — most standard panels only include glucose, missing the early insulin compensation phase.
HOMA-IR and longevity
Insulin resistance is increasingly recognized as the root metabolic dysfunction underlying the majority of chronic diseases that kill modern humans — type 2 diabetes, cardiovascular disease, non-alcoholic fatty liver disease, Alzheimer's disease (now called "type 3 diabetes" by some researchers), and certain cancers. HOMA-IR provides the earliest accessible window into this dysfunction. The pathophysiology begins with visceral adipose tissue: excess visceral fat secretes inflammatory cytokines and free fatty acids that impair insulin signaling in skeletal muscle and liver. The pancreas compensates by producing more insulin (hyperinsulinemia), which in turn promotes further fat storage, creating a self-reinforcing cycle. Skeletal muscle is the dominant site of glucose disposal, which is why resistance training and muscle maintenance are the most powerful interventions. Longevity physicians consider HOMA-IR below 1.0 a cornerstone metabolic target.
Where to get a HOMA-IR test
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Related biomarkers
These biomarkers are often tested alongside HOMA-IR for a more complete picture.
Frequently asked questions
What is a normal HOMA-IR?
How is HOMA-IR calculated?
Why is HOMA-IR important if my glucose is normal?
How can I improve my HOMA-IR?
How is HOMA-IR calculated?
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Sources: Reference ranges based on AHA/ACC, ADA, and AACE clinical guidelines. Biological variation data from Ricos/Westgard database. Longevity-optimal ranges reflect targets used by preventive and functional medicine practitioners.
Last reviewed: April 2026. This tool provides general health information and is not a substitute for professional medical advice, diagnosis, or treatment. Always consult your healthcare provider about your specific results.