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BiomarkerGlycemic & Metabolic

HOMA-IR

A calculated estimate of insulin resistance

Last reviewed
July 2026
Version
1.0
Review cadence
Annually

Overview

HOMA-IR (Homeostatic Model Assessment of Insulin Resistance) is a simple calculation from fasting glucose and fasting insulin that estimates how insulin-resistant a person is.

Why it matters

By combining glucose and insulin into one number, HOMA-IR can surface insulin resistance earlier and more clearly than either value alone, which is useful for tracking metabolic health over time.

Start Here

New to this? Read these first

  1. FoundationMetabolic HealthThe best place to understand the major drivers of metabolic disease.
  2. ConditionMetabolic SyndromeA cluster of risks that travel together
  3. Signal RecordMagnesiumEssential Mineral
  4. Body SystemMetabolismEnergy, blood sugar, and how the body processes fuel.
Typical Journey

How this usually unfolds

  1. Measure it
  2. Understand your result
  3. See what raises and lowers it
  4. Apply evidence-based interventions
  5. Recheck on your review cadence

An orientation to how this topic is typically approached — not medical advice.

Optimal Range

Where the evidence points

Roughly < 1.0 suggests good insulin sensitivity; values above ~2.5–2.9 commonly indicate insulin resistance in many populations.

Cutoffs are population-specific and depend on the (non-standardized) insulin assay; HOMA-IR is a research/context tool, not a formal diagnosis.

Clinical interpretation

A higher HOMA-IR means more insulin is needed to manage glucose — the hallmark of insulin resistance. It is most valuable as a trend within one lab and assay over time.

What raises and lowers it

Raises it

  • Insulin resistance and obesity
  • Refined carbohydrate intake
  • Inactivity

Lowers it

  • Weight loss
  • Exercise (aerobic and resistance)
  • Carbohydrate quality
  • Improved sleep
Related Evidence

How this connects across BioSignal

Related Signal Records

Related body systems

Related conditions

Related pharmaceuticals

  • Metformin
  • GLP-1 receptor agonists

Related lifestyle interventions

  • Exercise
  • Weight management
  • Carbohydrate quality

Diagnostics

  • Calculated: (fasting glucose mg/dL × fasting insulin µIU/mL) ÷ 405

Frequently asked questions

Is HOMA-IR a diagnosis?

No. It's an estimate used in research and for tracking, not a formal diagnostic criterion. It's most meaningful compared against your own prior values from the same lab.

Evidence summary

HOMA-IR is a well-studied surrogate for insulin resistance that correlates with clamp studies at the population level, with the caveats of assay variability and population-specific thresholds.

References & sources

  • Original HOMA methodology literature
  • Diabetes research consensus on insulin-resistance surrogates

Sources are named authoritative guidelines and scientific bodies. Biomarker pages present established clinical context; calibrated evidence verdicts on specific interventions live in the linked Signal Records.

Educational information — not medical advice

Reference ranges and interpretation vary by laboratory, assay, age, and individual. Use this to understand the science, then interpret your own results with a qualified clinician. See our Medical Disclaimer.

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