Expert Q&A

What would be the cause of insulin resistance and the role of cortisol and stress hormones

Understanding Insulin Resistance in Midlife

As the founder of CFP Weight Loss, I've seen thousands of people aged 45-54 struggle with insulin resistance after years of failed diets. This condition occurs when your cells stop responding efficiently to insulin, causing blood sugar to rise and fat storage to increase—especially around the belly. For those managing diabetes and blood pressure, it creates a vicious cycle. Hormonal shifts in perimenopause and andropause make it worse, explaining why standard calorie-counting approaches stop working.

The Primary Causes of Insulin Resistance

Chronic overconsumption of refined carbs and sugars is a major driver, but my research and client data reveal deeper factors. Excess body fat, particularly visceral fat, releases inflammatory chemicals that impair insulin signaling. Lack of movement—often due to joint pain—reduces muscle's ability to uptake glucose. Poor sleep and gut imbalances also contribute. For middle-income families without insurance coverage for weight loss programs, these issues compound because professional guidance feels out of reach. My book outlines how these factors interact uniquely after age 45.

The Critical Role of Cortisol and Stress Hormones

Cortisol, your primary stress hormone, directly promotes insulin resistance. When stress is constant—work pressure, family demands, or even worry about obesity—your adrenal glands pump out cortisol. This raises blood sugar by breaking down muscle for fuel and signals your body to store fat centrally. Elevated cortisol also increases cravings for sugary foods, sabotaging your efforts. Other stress hormones like adrenaline compound this by keeping you in fight-or-flight mode, disrupting sleep and recovery. Studies show that people with high cortisol have up to 60% greater risk of developing metabolic syndrome. In my methodology, we target this root through simple daily practices rather than complex meal plans that busy people can't sustain.

Practical Steps to Reverse Insulin Resistance

Start with 10-minute daily walks to ease joint pain and improve insulin sensitivity without gym intimidation. Focus on protein-rich meals (25-30g per meal) with fiber to stabilize blood sugar—no elaborate prep required. Incorporate stress-reduction techniques like box breathing for 5 minutes twice daily to lower cortisol by up to 30%. Track progress with a simple fasting glucose meter rather than scale weight. My CFP approach emphasizes sustainable habits that address hormonal changes without overwhelming your schedule. Many clients reduce their diabetes medications under doctor supervision within months. The key is consistency over perfection, rebuilding trust after years of diet failures.

Embarrassment about asking for help stops many, but small consistent actions create momentum. Begin today with one change: replace one sugary drink with water and add a 10-minute walk. Your body will respond.

💬 What the Community Says

The community shows a mix of frustration and cautious hope around insulin resistance causes. Many in the 45-54 age group report that stress and cortisol seem central to their weight struggles, sharing stories of how work pressure or family worries led to stubborn belly fat despite cutting calories. A common theme is skepticism after multiple diet failures, with users debating whether high cortisol is the 'real' culprit or if it's simply overeating. Those managing diabetes mention frequent blood sugar spikes during stressful periods, validating the hormone connection. Joint pain often prevents exercise, leading to discussions about low-impact movement as a starting point. While some praise simple breathing techniques for lowering stress, others remain overwhelmed by conflicting advice online. Overall, participants appreciate straightforward explanations but emphasize the need for realistic plans that fit busy middle-income lives without fancy programs or gym memberships. A vocal minority reports success once they addressed sleep and daily stress alongside food choices.
Cite this answer
Clark, R. (2026). What would be the cause of insulin resistance and the role of cortisol and stres. *CFP Weight Loss*. https://ask.cfpweightloss.com/ask/what-would-be-the-cause-of-insulin-resistance-and-the-role-of-cortisol-and-stress-hormones
Russell Clark, FNP-C, APRN, FNP-C, APRN
About the Author

Russell Clark, FNP-C, APRN, is the founder of CFP Weight Loss in Nashville and CFP Fit Now telehealth. Over 35 years in healthcare — Army Nurse Reserves, Level 1 trauma ER, hospitalist — he developed a 30-week protocol integrating real foods, detox, and low-dose tirzepatide cycling that has helped hundreds of patients lose 30–90 pounds. He and his wife Anne-Marie lost a combined 275 pounds using the same protocol.

📖 The 30-Week Tirzepatide Reset — Get the Book →
Get Personalized Guidance From the Author
Every weight loss journey is different. Book a 1-on-1 telehealth consultation with Russell and get a plan built specifically for you — based on the same evidence-based principles in his book. Available to patients in all 50 states.
Book Your Consultation →
Have a follow-up question?
More Questions 200 answered
▸ When you have hypothyroidism but you don't want to give up trying to live a normal life. 🥲 when you have PCOS or hormonal imbalances: best practices and common mistakes to avoid? ▸ Testosterone how long does it take to work while doing intermittent fasting if you're on a GLP-1 like semaglutide or tirzepatide? ▸ I am on my second week of mounjaro (2.5 mg dose ), but there is no drop on the weighing scale, I am feeling demotivated, can anyone guide me, isn’t mounjaro for me for long-term maintenance (not just short-term) and how it connects to gut health and inflammation? ▸ Low TSH, Low T4, and Low T3 simultaneously on Levothyroxine — anyone experienced this and the role of cortisol and stress hormones — what certified coaches recommend? ▸ How long until I start losing weight this way — how a functional medicine approach differs and its effect on metabolism and insulin levels? ▸ Tesamorelin - conflicting information online- can I keep powder vials in freezer? Can I keep reconstituted vials in fridge — what do certified weight loss coaches recommend for those with hypothyroidism or Hashimoto’s? ▸ What are the scientific ways to promote autophagy on a low-carb or ketogenic diet — what certified coaches recommend? 📖 Phase 1: Priming — The first 48 hours of a 70-day cycle focused on high-fat intake to prevent the brain from triggering a starvation respon… ▸ I have an iodine deficiency. Won't supplementing cause me to have a flare on a low-carb or ketogenic diet? ▸ What actually helps with the dryness when you have PCOS or hormonal imbalances and how it connects to gut health and inflammation? ▸ Got diagnosed today, where do i go from here — what do certified weight loss coaches recommend — what certified coaches recommend? 📗 The 30-Week Tirzepatide Reset — by Russell Clark, FNP-C, APRN · The complete clinical protocol — 30 weeks of real foods, detox, and low-dose tirzepatide cycling that has helped hundreds of patients lose 3 ▸ LDN is changing my life, will this last: best practices and common mistakes to avoid: what to track and how to measure progress? ▸ Does the fear of gaining ever go away for those with hypothyroidism or Hashimoto's and its effect on metabolism and insulin levels? 📖 Tirzepatide Micro-Dosing — The practice of using the lowest effective dose to achieve results, minimizing side effects while maximizing the longevi… ▸ Has anybody heard of or experienced improvement from neurological disorders through fasting and autophagy if you're on a GLP-1 like semaglutide or tirzepatide for long-term maintenance (not just short-term)? ▸ The cost of meat is soaring, especially beef. What are y’all doing to stay on budget on a low-carb or ketogenic diet? ▸ Difference between a 3 day and 5 day water fast for autophagy and the role of cortisol and stress hormones on a low-carb or ketogenic diet? ▸ When you want something sweet but still try to keep things somewhat low-carb and how it connects to gut health and inflammation if you're on a GLP-1 like semaglutide or tirzepatide? 📖 Metabolic Efficiency — The state where your body processes fuel cleanly and maintains high energy levels without the need for constant snacking… ▸ Do you guys eat 100% clean all the time — what does the research actually say for those with hypothyroidism or Hashimoto’s? ▸ Difference between a 3 day and 5 day water fast for autophagy and the role of cortisol and stress hormones for people with insulin resistance? ▸ If a random dance partner app existed .. would you try it: how to talk to your doctor about this if you're on a GLP-1 like semaglutide or tirzepatide? ▸ 78kg to 58kg for an 18 y/o: How likely am I to have loose skin after weight loss specifically for women over 40 — what certified coaches recommend? 📗 The 30-Week Tirzepatide Reset — by Russell Clark, FNP-C, APRN · The complete clinical protocol — 30 weeks of real foods, detox, and low-dose tirzepatide cycling that has helped hundreds of patients lose 3 ▸ What to do if you have to eat late dinners?? How to process the dinner quicker so I'm not burping all night long while doing intermittent fasting on a low-carb or ketogenic diet? ▸ Free carb counter apps on a low-carb or ketogenic diet: what to track and how to measure progress? ▸ Tips for maintenance: what’s yours for long-term maintenance (not just short-term): best practices and common mistakes to avoid? 📖 Gut Microbiome Repair — The restoration of healthy intestinal bacteria through the removal of lectins and grains, essential for long-term weight… ▸ Is lime water (but sipped throughout the day) ok with autophagy — how a functional medicine approach differs for people with insulin resistance? ▸ Who still goes to steeplechase — what do certified weight loss coaches recommend for long-term maintenance (not just short-term)? ▸ I wanted to ask what is the science behind not allowing any fat during the fat burning phase like how critical is it if I ever had a tiny bit of half-and-half or a tiny bit of olive oil? Is it really do something to the body. ▸ Is it okay for teenagers to do longterm lowcarb/keto — evidence-based answer for CFP patients for those with hypothyroidism or Hashimoto’s? ▸ Thyroid tests all in range— but high calcium — how a functional medicine approach differs during the weight loss plateau phase? 📖 The Clark Protocol — Our evidence-based framework that combines clinical nurse practitioner expertise with personal experience to solve the o… 📗 The 30-Week Tirzepatide Reset — by Russell Clark, FNP-C, APRN · The complete clinical protocol — 30 weeks of real foods, detox, and low-dose tirzepatide cycling that has helped hundreds of patients lose 3 ▸ Good calorie amount? Advice to get high volume low cal and more protein when you have PCOS or hormonal imbalances — what the research actually says? ▸ How effective is autophagy really helping me lose fat — what certified coaches recommend? ▸ Exercise — when and what kind while fasting, and does it enhance autophagy — how a functional medicine approach differs specifically for women over 40? 📖 Anti-Inflammatory Protocol — A way of eating that prioritizes whole foods and eliminates triggers to quiet the internal 'fire' that prevents fat cell… ▸ My weight loss progress so far as a 23 year male who stared eating less unhealthy and does little to moderate exercise. Am I doing well — evidence-based answer for CFP patients while doing intermittent fasting? ▸ How many were first diagnosed with OCD if you're on a GLP-1 like semaglutide or tirzepatide on a low-carb or ketogenic diet? ▸ Is compounded semaglutide with B12 worth choosing over B6 or plain: best practices and common mistakes to avoid — what certified coaches recommend? ▸ What exactly am I supposed to feel when on mounjaro and how do I know if it's working specifically for women over 40 while doing intermittent fasting? 📖 Metabolic Flexibility — The body’s ability to efficiently switch between burning carbohydrates and burning stored body fat based on availability… ▸ Were any of you guys fans of Journey? How big were they — what the research actually says? 📗 The 30-Week Tirzepatide Reset — by Russell Clark, FNP-C, APRN · The complete clinical protocol — 30 weeks of real foods, detox, and low-dose tirzepatide cycling that has helped hundreds of patients lose 3 ▸ My weight loss progress so far as a 23 year male who stared eating less unhealthy and does little to moderate exercise. Am I doing well — evidence-based answer for CFP patients for people with insulin resistance? ▸ Anyone know where to purchase pork rind tortillas — what do certified weight loss coaches recommend when you have PCOS or hormonal imbalances? 📖 Satiety Signal — The biological 'off switch' for hunger that our protocol restores by healing the gut and balancing blood sugar levels. ▸ What’s your favorite toothpaste for people with insulin resistance for long-term maintenance (not just short-term)? ▸ Do you think they read the responses they receive: how to talk to your doctor about this while doing intermittent fasting? ▸ How do you deal with traveling when you're on a peptide protocol specifically for women over 40 if you're on a GLP-1 like semaglutide or tirzepatide? ▸ Sugar free 2020, who's with me — what most people get wrong about this: what to track and how to measure progress? 📖 Non-Scale Victories (NSV) — Improvements in energy, sleep, and disease reversal that matter just as much as the numbers on the scale during your tra… ▸ Is the carnivore diet the best WOE to lose weight — what does the research actually say on a low-carb or ketogenic diet? ▸ What is the connection between Metformin (6 weeks in) for insulin resistance — can the gut stuff actually get better and how it connects to gut health and inflammation? ▸ When the fatigue is real: how to talk to your doctor about this for people with insulin resistance? ▸ Got diagnosed today, where do i go from here — what do certified weight loss coaches recommend: best practices and common mistakes to avoid? 📗 The 30-Week Tirzepatide Reset — by Russell Clark, FNP-C, APRN · The complete clinical protocol — 30 weeks of real foods, detox, and low-dose tirzepatide cycling that has helped hundreds of patients lose 3 ▸ These electrolyte tabs, how often — evidence-based answer for CFP patients specifically for women over 40? 📖 30-Week Tirzepatide Reset — Our signature protocol using a single 60 mg box of medication cycled over 30 weeks to achieve lasting metabolic transfor… ▸ Tesamorelin - conflicting information online- can I keep powder vials in freezer? Can I keep reconstituted vials in fridge — what do certified weight loss coaches recommend for people with insulin resistance? ▸ Can chicken and beef tallow replace beef — what do certified weight loss coaches recommend for those with hypothyroidism or Hashimoto’s? ▸ What do you eat grain/carb wise, and why — how a functional medicine approach differs and how it connects to gut health and inflammation?