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Insulin Resistance

A condition where cells in muscles, fat, and liver do not respond well to insulin, impairing glucose uptake.

Medical Disclaimer

This information is for educational purposes only and is not a substitute for professional medical advice. Always consult with a qualified healthcare provider for diagnosis and treatment.

Overview

Insulin resistance occurs when cells throughout the body don't respond efficiently to insulin, the hormone that allows glucose to enter cells for energy. The pancreas compensates by producing more insulin, leading to high insulin levels (hyperinsulinemia) while blood glucose may still remain normal initially.

Over time, the pancreas may not keep up with demand, and blood glucose rises, leading to pre-diabetes and eventually type 2 diabetes. Insulin resistance is also closely linked to metabolic syndrome, cardiovascular disease, PCOS, and fatty liver disease.

Causes include excess body weight (especially abdominal fat), sedentary lifestyle, poor diet, genetics, and certain conditions like PCOS. Insulin resistance is increasingly common, affecting an estimated 40% of adults in developed countries.

Common Symptoms

  • •Fatigue, especially after meals
  • •Brain fog and difficulty concentrating
  • •Increased hunger, especially for carbs
  • •Weight gain, especially around the abdomen
  • •Difficulty losing weight
  • •Dark skin patches (acanthosis nigricans)
  • •Skin tags
  • •High blood pressure
  • •Elevated triglycerides
  • •Low HDL cholesterol
  • •PCOS symptoms in women

Key Blood Markers

Fasting Insulin

Elevated (>10 μIU/mL suggests resistance)

The most direct measure of insulin resistance - elevated levels indicate resistance

Fasting Glucose

Normal to elevated

May be normal initially due to compensatory high insulin

HbA1c

Normal to mildly elevated

Long-term glucose control - may be normal early in insulin resistance

Triglycerides

Often elevated

Strongly associated with insulin resistance

HDL Cholesterol

Often low

Low HDL is part of the metabolic pattern seen with insulin resistance

Frequently Asked Questions

How is insulin resistance calculated?
HOMA-IR (Homeostatic Model Assessment) is commonly used: (fasting insulin × fasting glucose) / 405. Values above 2.0-2.5 suggest insulin resistance. Higher values indicate more severe resistance.
Can insulin resistance be reversed?
Yes! Insulin sensitivity can improve significantly with lifestyle changes: weight loss (especially visceral fat), regular exercise (both cardio and resistance training), reducing refined carbohydrates, adequate sleep, and stress management.
Why isn't fasting insulin routinely tested?
Fasting insulin isn't part of standard panels because it's expensive and guidelines focus on glucose. However, it's valuable for early detection of metabolic issues and is increasingly requested by proactive individuals and physicians.
What is the relationship between insulin resistance and fatty liver?
Insulin resistance and fatty liver (NAFLD) are closely linked. High insulin promotes fat storage in the liver, while liver fat worsens insulin resistance. Treating one often improves the other.

Quick Facts

  • Key Markers:5
  • Common Symptoms:11

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