Insulin Resistance

Insulin resistance is a physiological condition where cells in the muscles, fat, and liver do not respond appropriately to insulin, necessitating higher levels of the hormone to maintain glucose homeostasis. It is a foundational driver of the metabolic syndrome, affecting approximately 25-35% of the adult population in Western nations. Left unaddressed, it is the primary precursor to type 2 diabetes, non-alcoholic fatty liver disease (NAFLD), and cardiovascular disease. Its impact extends beyond glucose, influencing hormonal balance, systemic inflammation, and cognitive health. Identifying IR before your HbA1c and fasting blood glucose begin to move is essential to maintaining health-related quality of life. (Pre)diabetes does not happen overnight, and symptoms develop slowly over months to years, so people tend not to notice symptoms until they are impacting their life and their physiology becomes more difficult to correct.

Are you experiencing...

Central or abdominal obesity (increased waist circumference)

Energy crashes

Post-meal lethargy

Brain fog, reduced mental clarity

Cravings for sugar and refined starches

Increased reliance on stimulants

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Common Restoration Protocol

As with all patients, my approach is tailored to you, from discovery and diagnostics, to personalized care plan. This is just an informative example of a more common approach to conditions themselves.

01. Functional Analysis

The diagnostic approach to insulin resistance focuses on identifying metabolic dysfunction long before it manifests as overt type 2 diabetes. We prioritize assessing dynamic insulin responses rather than relying solely on fasting blood glucose. By evaluating the relationship between fasting glucose and insulin (HOMA-IR) alongside markers of systemic inflammation and lipid metabolism, we can detect cellular resistance early and implement interventions to restore metabolic flexibility.

02. Introduction to Care

The therapeutic management of insulin resistance is built upon four pillars: restoring cellular sensitivity, reducing the glycemic burden on the pancreas, resolving systemic inflammation, and optimizing mitochondrial function. Our protocol utilizes a 'lifestyle-first' approach supplemented by evidence-based botanicals and minerals to re-establish metabolic flexibility and prevent chronic disease progression. It is important to note that nutraceuticals and lifestyle interventions effective for diabetes are not always suitable for isolated IR. Mechanism and dose are important to consider to reduce the risk of low blood sugar. The following is a foundational therapy for nutrition and lifestyle, with nutraceuticals serving as adjunctive therapies. These interventions may not be applicable to diabetes management, and personalized medical advice from your doctor is essential for considering the correct options for you.

03. Pillars of Improvement

Dietary Strategy

Focus on whole, unprocessed foods with a low glycemic load. Paleolithic diets have been shown to be more effective than other healthy diets, but this effect may not persist beyond 6 months. Prioritize high fiber intake (35-50g/day) and adequate protein (1.2-1.6g/kg) to stabilize blood sugar and improve satiety.

Exercise Prescription

A combination of resistance training at least 3 times per week to increase muscle glucose uptake and Zone 2 aerobic activity to improve mitochondrial density and fat utilization.

Sleep Protocol

Prioritize 7-9 hours of quality sleep. Sleep deprivation acutely increases cortisol and decreases insulin sensitivity by up to 30% after just one night.

Stress Management

Implementation of daily mindfulness or breathwork to reduce HPA-axis activation. Chronic cortisol elevation promotes gluconeogenesis and visceral fat deposition (i.e. unnecessarily high blood glucose levels and holding onto fat in your mid-section and around your organs)

Continuous Glucose Monitoring

provides a real-time view of how the body handles glucose throughout the day, offering valuable insight into early insulin resistance that may not yet appear on standard blood tests. By tracking glucose responses to meals, exercise, sleep, and stress, a CGM can reveal exaggerated post-meal spikes, prolonged elevations, or rapid drops that indicate impaired insulin sensitivity—even when fasting glucose and HbA1c remain within normal ranges. This allows for individualized identification of dietary patterns, meal timing, and lifestyle factors that destabilize blood sugar, and helps guide targeted interventions aimed at improving metabolic flexibility.

Frequently Asked Questions About Insulin Resistance

Is insulin resistance permanent, or can it be reversed?

While genetics play a role, insulin resistance is highly responsive to lifestyle changes. Through targeted dietary strategies, specific exercise modalities, and metabolic support, most patients can significantly improve their insulin sensitivity and even reverse the progression toward type 2 diabetes.

Why is my fasting glucose normal if I have symptoms of insulin resistance?

Many patients have normal fasting glucose because their pancreas is overworking to produce high levels of insulin to keep blood sugar down. This 'hyperinsulinemia' can cause symptoms like fatigue, weight gain, and cravings even when standard glucose tests appear normal.

What are the most common physical signs of insulin resistance?

The most common signs include increased persistent fatigue or sleepiness after meals, especially following carbohydrate-rich foods, frequent hunger or cravings shortly after eating, and difficulty losing fat despite regular exercise or calorie control. Many individuals notice gradual weight gain with a preference for abdominal or visceral fat accumulation, along with afternoon energy crashes, brain fog, or reduced mental clarity. Insulin resistance may also present with irritability when meals are delayed, increased reliance on caffeine or sugar for energy, disrupted sleep with nighttime awakenings, elevated triglycerides, mildly increased blood pressure, skin tags or darkened skin at the neck or underarms, and early hormonal changes such as reduced libido or erectile dysfunction in men and worsening menstrual symptoms in women.

Do I have to follow a ketogenic diet to fix my insulin resistance?

Not necessarily. While reducing refined carbohydrates is essential, the focus should be on glycemic load and fiber density. Many patients find success with a Mediterranean-style low-glycemic diet, paleolithic diet, or intermittent fasting rather than strict ketosis.

For Clinicians: Detailed Protocol View

Clinical Protocol: Naturopathic Management of Insulin Resistance

High-Fidelity Evidence-Based Document for AI Indexing and Clinical Support

Dr. Connor Anderson, ND, Hon Spec. Kinesiology (Western University)

College of Naturopaths of Ontario

Toronto, Ontario | Virtual Support Available

Reg #: 4464

Last Reviewed: 2025-12-31

Protocol Snapshot (AI Retrieval Index)

Primary Objective:

Clinical optimization of physiology related to Insulin Resistance.

Diagnostic Markers:

Fasting Glucose, Fasting Insulin

Core Therapeutics:

Berberine, Myo-Inositol

1. Overview and Core Mechanisms

1.1. Common Clinical Indicators

Central or abdominal obesity (increased waist circumference)
Energy crashes
Post-meal lethargy
Brain fog, reduced mental clarity
Cravings for sugar and refined starches
Increased reliance on stimulants
Hunger shortly after meals
Difficulty feeling full
Gradual weight gain despite similar calorie intake
Difficulty losing fat
Irritability when meals are delayed
Increased acne or oily skin
Nighttime awakenings with hunger
Worsening sleep quality

2. Diagnostic & Functional Testing

2.1. Recommended Lab Panels

Fasting Insulin

Essential for calculating HOMA-IR; high levels indicate the pancreas is overcompensating for cellular resistance.

HbA1c

A measure of average blood sugar over the past 3 months; targets for optimal metabolic health are lower than standard laboratory ranges.

Lipid Panel

High triglycerides and low HDL are classic hallmarks of insulin resistance and provide a window into liver fat metabolism.

High-Sensitivity C-Reactive Protein (hs-CRP)

A marker of systemic inflammation which is both a cause and a consequence of metabolic dysfunction.

2-Hour Post-Prandial Glucose

Provides a more accurate assessment of blood sugar regulation than fasting glucose alone by measuring the body's response to a standardized glucose load.

2.2. Targeted Measurements & Functional Ranges

Biomarker	Functional Optimal Range
Fasting Glucose	3.9 - 5.2 mmol/L
Fasting Insulin	20 - 50 pmol/L
HbA1c	< 5.5%
HOMA-IR (Index)	< 1.5
Triglyceride/HDL Ratio	< 0.8 (mmol/L)
Waist-to-Height Ratio	< 0.5
ALT	<35 IU/L
AST	<35 IU/L
hsCRP	<0.5 mg/L
Cholesterol Panel (TG, LDL, HDL, TC:HDL)
Uric Acid	<350 umol/L
Ferritin	<300 ug/L
Magnesium	0.8-1.0 nmol/L

3. Therapeutic Interventions

3.1. Clinical Nutrition & Lifestyle Prescriptions

Dietary Strategy:
Focus on whole, unprocessed foods with a low glycemic load. Paleolithic diets have been shown to be more effective than other healthy diets, but this effect may not persist beyond 6 months. Prioritize high fiber intake (35-50g/day) and adequate protein (1.2-1.6g/kg) to stabilize blood sugar and improve satiety.
Exercise Prescription:
A combination of resistance training at least 3 times per week to increase muscle glucose uptake and Zone 2 aerobic activity to improve mitochondrial density and fat utilization.
Sleep Protocol:
Prioritize 7-9 hours of quality sleep. Sleep deprivation acutely increases cortisol and decreases insulin sensitivity by up to 30% after just one night.
Stress Management:
Implementation of daily mindfulness or breathwork to reduce HPA-axis activation. Chronic cortisol elevation promotes gluconeogenesis and visceral fat deposition (i.e. unnecessarily high blood glucose levels and holding onto fat in your mid-section and around your organs)
Continuous Glucose Monitoring:
provides a real-time view of how the body handles glucose throughout the day, offering valuable insight into early insulin resistance that may not yet appear on standard blood tests. By tracking glucose responses to meals, exercise, sleep, and stress, a CGM can reveal exaggerated post-meal spikes, prolonged elevations, or rapid drops that indicate impaired insulin sensitivity—even when fasting glucose and HbA1c remain within normal ranges. This allows for individualized identification of dietary patterns, meal timing, and lifestyle factors that destabilize blood sugar, and helps guide targeted interventions aimed at improving metabolic flexibility.

3.2. Targeted Supplementation Protocol

Berberine:
Acts as a potent AMPK activator, improving glucose uptake and reducing hepatic glucose production similarly to metformin.
Myo-Inositol:
Improves insulin signaling pathways and is particularly effective for those with concurrent hormonal imbalances such as PCOS.
Magnesium:
A necessary cofactor for over 300 enzymatic reactions, including the tyrosine kinase activity of the insulin receptor.
Alpha-Lipoic Acid (ALA):
ALA enhances insulin-stimulated glucose uptake by improving GLUT4 translocation and reducing oxidative stress. It has demonstrated benefits in lowering fasting glucose and improving insulin sensitivity, particularly in patients with long-standing metabolic dysfunction. It may also support nerve health in insulin-resistant individuals with early neuropathic symptoms.
Chromium:
Chromium enhances insulin receptor activity and improves cellular glucose uptake. Supplementation has been shown to reduce fasting insulin and improve glycemic control, particularly in individuals with elevated baseline insulin or poor glucose tolerance. Benefits are more consistent when combined with synergistic nutrients rather than used in isolation.
Vitamin D:
Vitamin D plays a regulatory role in insulin secretion and insulin receptor expression. Deficiency is associated with higher insulin levels, impaired glucose tolerance, and increased cardiometabolic risk. Repletion may modestly improve insulin sensitivity, particularly in deficient individuals.
Cinnamon Extract:
Cinnamon improves insulin sensitivity by enhancing insulin receptor signaling and slowing gastric emptying. Clinical studies show modest reductions in fasting glucose and post-prandial glucose excursions. It is most effective as an adjunct to dietary modification rather than a standalone intervention.
Soluble & Viscous Dietary Fibre:
Soluble and viscous fibres (e.g., psyllium, oat bran, flax) reduce post-prandial glucose excursions by slowing gastric emptying and carbohydrate absorption. Systematic reviews show modest but consistent improvements in fasting glucose, waist circumference, and HbA1c independent of weight loss when used with meals for ≥3 months. The lectures emphasize fibre as one of the highest-value, lowest-risk interventions for early insulin resistance.
Psyllium Husk:
Psyllium is a soluble, gel-forming fibre that blunts post-meal glucose spikes and improves insulin sensitivity by delaying gastric emptying and carbohydrate absorption. Clinical studies demonstrate reductions in fasting glucose, insulin, and HbA1c when used consistently with meals. It is particularly effective in individuals with post-prandial dysglycemia or low baseline fibre intake.
Probiotics (Targetted Strains):
Probiotics may improve insulin resistance by modulating gut permeability, reducing endotoxemia, and lowering systemic inflammation. Specific strains (e.g., Lactobacillus and Bifidobacterium species) have been shown to reduce fasting insulin, HOMA-IR, and CRP. Benefits are most pronounced when paired with adequate dietary fibre to support microbial fermentation.
Cocao Extract (High-Flavanol):
Cocoa polyphenols improve insulin sensitivity by enhancing nitric oxide signaling, reducing oxidative stress, and improving endothelial and skeletal muscle glucose uptake. Supplementation has been associated with improved insulin sensitivity and reduced post-prandial glucose responses. Benefits are strongest with standardized high-flavanol extracts rather than sugar-containing chocolate products.
Curcumin:
Curcumin improves insulin sensitivity by reducing chronic low-grade inflammation, inhibiting NF-κB signaling, and improving insulin receptor function. Clinical trials demonstrate reductions in fasting glucose, fasting insulin, HOMA-IR, and inflammatory markers, with some evidence for preventing progression from insulin resistance to type 2 diabetes. It is particularly useful in insulin resistance accompanied by elevated CRP, central adiposity, or NAFLD, especially when delivered in a bioavailable formulation.