---
title: "Homeostatic Model Assessment of Insulin Resistance (HOMA-IR) Optimal Range vs Lab Normal (2026 Clinical Decoder & Protocol) | Nutrition Research Labs"
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description: "Decode your Homeostatic Model Assessment of Insulin Resistance (HOMA-IR) (HOMA-IR Score) blood test: Longevity Optimal Target (0.5–1.4 Score) vs Standard Lab Normal (0.5–2.5 Score), assay interference, and Grade-A clinical protocols."
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> **Canonical Source:** [https://nutritionresearchlabs.com/biomarkers/homa-ir](https://nutritionresearchlabs.com/biomarkers/homa-ir)
>
> *Decode your Homeostatic Model Assessment of Insulin Resistance (HOMA-IR) (HOMA-IR Score) blood test: Longevity Optimal Target (0.5–1.4 Score) vs Standard Lab Normal (0.5–2.5 Score), assay interference, and Grade-A clinical protocols.*

## Reference Range Comparison (Score)

- **Longevity & Metabolic Optimal Range:** 0.5 – 1.4 Score
- **Standard Lab Reference Interval ("Normal"):** 0.5 – 2.5 Score
- **Why Standard Lab Ranges Mislead Patients:** Standard commercial laboratories set normal cutoffs up to 2.5 or 3.0 based on cross-sectional population medians in societies where over 40% of the population suffers from subclinical metabolic endotoxemia and hyperinsulinemia. Longitudinal cardiometabolic studies show vascular endothelial dysfunction and non-alcoholic fatty liver disease (NAFLD) accelerate above 1.4.
- **Pre-Draw Supplement Assay Interference Warning:** Hemolysis during phlebotomy degrades serum insulin peptides, artificially suppressing calculated HOMA-IR. Acute intense exercise within 14 hours alters insulin receptor sensitivity. Biotin supplementation above 5mg daily can skew competitive immunoassays.

## Decode the Next Biomarker on Your Blood Panel

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