Homeostatic Model Assessment of Insulin Resistance (HOMA-IR)
HOMA-IR mathematically models the bidirectional feedback loop between fasting glucose and fasting insulin, serving as the gold-standard epidemiological surrogate for hyperinsulinemic-euglycemic clamp studies.
Standard vs. Optimal Reference Rangesindex
Standard reference intervals represent the statistical 95% distribution of unselected commercial populations. Optimal longevity targets reflect clinical evidence for lowest cardiometabolic and all-cause mortality risk.
Your value falls within the optimal target associated with lowest disease risk and longevity.
< 2.0 (Calculated: [Glucose × Insulin] / 405)
General reference distribution across unselected commercial populations.
< 1.0
Concentration target associated with minimal all-cause cardiometabolic mortality.
Molecular Mechanism & Clinical Purpose
Calculated via the equation: HOMA-IR = [Fasting Glucose (mg/dL) × Fasting Insulin (μIU/mL)] / 405. High values demonstrate that supranormal insulin titers are required to maintain euglycemia against hepatic and peripheral receptor resistance.
Differential Diagnosis
Elevated Levels (HOMA-IR High)
- •Compensated insulin resistance
- •Metabolic dysfunction-associated steatohepatitis (MASH)
- •Central visceral adiposity
Low Levels (HOMA-IR Low)
- •High whole-body insulin sensitivity
- •Insulinopenia (verify with C-Peptide)
Technical Reference & Deep Dive
Biochemistry & Enzymatic Pathways
Longevity Risk Architecture & Epidemiology
Pre-Analytical Caveats & Diagnostic Workup
Pre-Analytical Considerations:
Strict 10 to 12 hour overnight water-only fasting is mandatory for baseline metabolic quantification. Acute psychological stress, acute infectious illness, and sleep deprivation (<6 hours) transiently elevate cortisol and catecholamines, falsely elevating glycemic markers. For glucose and insulin testing, draw blood into sodium fluoride/potassium oxalate tubes or separate serum promptly within 30 minutes to prevent ongoing in vitro red blood cell glycolysis.
Reflexive Testing Protocol:
- Homeostatic Model Assessment of Insulin Resistance (HOMA-IR) and HOMA-Beta calculations
- Continuous Glucose Monitoring (CGM) 14-day wear to evaluate glycemic variability and postprandial excursions
- Fasting C-Peptide and high-sensitivity Troponin/hs-CRP to differentiate insulin resistance from beta-cell exhaustion
- Oral Glucose Tolerance Test (OGTT) with simultaneous 0, 30, 60, and 120-minute insulin assays
- Abdominal ultrasound or FibroScan to evaluate hepatic steatosis and non-alcoholic fatty liver disease (MASLD)
Clinical Citations & Primary Literature (1)
- [1]Assessment of Insulin Resistance in Clinical Research and Practice - Nature Reviews Endocrinology (2021). PMID: 34183812
Associated Longevity Guides & Clinical Calculators
Medicine 3.0Explore comprehensive evidence-based clinical protocols, testing costs, and algorithmic calculators that incorporate Homeostatic Model Assessment of Insulin Resistance (HOMA-IR) into overall healthspan optimization.