Expert Q&A

Anyone else come to the realization IR was the root cause of issues throughout your life while doing intermittent fasting

The Moment Intermittent Fasting Exposed Insulin Resistance

When I started guiding clients through my Intermittent Fasting protocols, many in their late 40s and early 50s reported the same startling realization: years of fatigue, stubborn weight, joint pain, and blood sugar swings traced back to undiagnosed insulin resistance. This metabolic dysfunction often begins silently in our 30s, worsened by hormonal shifts, stress, and processed foods. For complete beginners who’ve failed every diet, recognizing this connection is liberating yet overwhelming.

In my experience working with middle-income Americans managing diabetes and high blood pressure, insulin resistance explains why traditional calorie-cutting never worked. Your body simply stops responding efficiently to insulin, forcing the pancreas to produce more. The result? Constant hunger, energy crashes, and fat storage around the middle despite “eating healthy.”

Why Intermittent Fasting Uncovers the Root Cause

Intermittent fasting lowers insulin levels for extended periods, allowing your cells to regain sensitivity. Clients often notice within 2-4 weeks that joint pain decreases because inflammation drops as blood sugar stabilizes. One 52-year-old teacher with knee issues that made exercise feel impossible reported walking pain-free after 16:8 fasting combined with my gentle movement plan. This isn’t magic—it’s biology. Fasting gives your body 14-18 hours daily without incoming glucose, letting it burn stored fat instead of fighting high insulin.

Hormonal changes around perimenopause amplify insulin resistance, making weight loss even harder. My methodology in The Fasting Reset accounts for this by starting with shorter fasts and focusing on nutrient-dense meals during eating windows. Avoid the trap of conflicting nutrition advice: prioritize protein (aim for 1.2g per kg of body weight) and fiber-rich vegetables over ultra-processed carbs.

Practical Steps to Reverse Insulin Resistance Safely

Begin with a 12:12 intermittent fasting window if you’re new—no complicated meal plans needed. Eat your last meal by 7pm and breakfast at 7am. Track fasting blood glucose with an affordable meter; numbers above 100 mg/dL fasting often signal resistance. Walk 10-15 minutes after meals to improve insulin sensitivity by up to 30% without triggering joint pain.

Address embarrassment about obesity by remembering this is a medical condition, not a character flaw. Insurance rarely covers programs, so my approach uses grocery-store foods and free apps. Combine with resistance bands twice weekly—clients managing blood pressure see systolic drops of 10-15 points in 8 weeks. Stay hydrated and replenish electrolytes to prevent fatigue.

Long-Term Benefits and What to Expect

Once insulin resistance improves, energy returns, diabetes markers improve, and weight comes off steadily—often 1-2 pounds weekly without feeling deprived. Many report lifelong issues like brain fog and mood swings resolving. The key is consistency over perfection. My clients who stick with the 16:8 protocol for 90 days see average A1C reductions of 0.8-1.2 points. This realization isn’t the end—it’s the beginning of sustainable health at any age.

💬 What the Community Says

The community on forums like Reddit’s r/intermittentfasting and Facebook weight loss groups frequently shares stories of discovering lifelong insulin resistance during IF journeys. Most beginners over 45 describe the “aha moment” after 3-6 weeks when energy stabilizes and old symptoms like joint aches or constant hunger fade. A common debate centers on whether fasting simply reveals the issue or actively reverses it—many report improved fasting glucose numbers and smaller waists, especially those managing prediabetes. Lived experiences vary: some with severe hormonal changes praise pairing IF with walking, while others warn against jumping into long fasts too quickly due to dizziness. Insurance barriers and past diet failures make people cautious, yet a vocal minority celebrates finally understanding why “everything” felt impossible before. Overall sentiment is hopeful but calls for medical guidance when blood pressure or diabetes meds are involved.
Clark, R. (2026). Anyone else come to the realization IR was the root cause of issues throughout y. *CFP Weight Loss*. https://blog.cfpweightloss.com/ask/anyone-else-come-to-the-realization-ir-was-the-root-cause-of-issues-throughout-your-life-while-doing-intermittent
Russell Clark, 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.

Have a follow-up question?
More Questions 200 answered
Fuck is Almond milk — what does the research actually say? How do you gauge progress from zone 2 while doing intermittent fasting Can deep extended autophagy reverse deep cavities, does anyone have any experience regarding this for long-term maintenance (not just short-term) Carbon Dioxide Breathalyzer — how a functional medicine approach differs Post menopausal bleeding — how a functional medicine approach differs Has anyone been diagnosed with Hashimotos after going through emotional distress or chronic stress in general and the role of cortisol and stress hormones 📖 Muscle Sarcopenia — The dangerous loss of lean muscle mass often seen in traditional 'crash diets' or high-dose GLP-1 use, which we combat t… Newb question: focusing on perceived exertion or heart rate — how a functional medicine approach differs Can we talk about the founder: how to talk to your doctor about this What is the Role of Metabolism in Immune System — how a functional medicine approach differs 📖 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… 📗 The 30-Week Tirzepatide Reset — Get Russell's complete protocol → Was so tempted to hit the drive thru today. Went to the store instead for those with hypothyroidism or Hashimoto's Semaglutide + lifting — how are you fueling workouts on low calories — how a functional medicine approach differs Zone 2 running is absurdly slow (slower than walking) — am I doing this right while doing intermittent fasting Did anyone else feel like Trintellix completely blunted their GLP-1 (Mounjaro/Wegovy) effect while doing intermittent fasting App that can predict symptoms before they get bad — how a functional medicine approach differs Insomnia while taking oral minoxidril if you're on a GLP-1 like semaglutide or tirzepatide Is the idea of the kitchen timer to eventually get to the point where someone has an orgasm just from hearing the ding? Pavlov's orgasm while doing intermittent fasting 📖 High-Dose Dependency — The pharmaceutical trap of staying on maximum medication doses indefinitely, which we avoid through our smart cycling me… What has autophagy cured/made better in you: how to talk to your doctor about this 📗 The 30-Week Tirzepatide Reset — Get Russell's complete protocol → Was so tempted to hit the drive thru today. Went to the store instead and how it connects to gut health and inflammation Same Workout Until it becomes Zone 2 while doing intermittent fasting What is this new frozen hell specifically for women over 40 📖 Tirzepatide — A dual-acting medication targeting both GLP-1 and GIP receptors, providing a more comprehensive metabolic signal than si… Anyone worried about the FDA crackdown: how to talk to your doctor about this Has Gundry ever explained why he thinks APOE4 carriers love cheese so much while doing intermittent fasting E Patch to Injections how long did you leave your patch on and how it connects to gut health and inflammation 📖 Adipose Tissue Signaling — The way fat cells communicate with the brain; our goal is to fix these signals so the body stops defending an unnaturall… How much are people paying for Estring and how it connects to gut health and inflammation Had my annual physical today: what to track and how to measure progress Anyone had improvement in symptoms after already eating a clean plant based diet — how a functional medicine approach differs 📗 The 30-Week Tirzepatide Reset — Get Russell's complete protocol → So if you're spacing out your shots - what are y'all doing with extra injectors: what to track and how to measure progress 📖 Caloric Deficit Myth — The false belief that weight loss is purely 'math'; we focus on hormonal signaling rather than just counting calories to… Should i really be aiming for 45 zone 2 minutes per day for fat loss while doing intermittent fasting Is this normal? Feels like a waste and its effect on metabolism and insulin levels Is it even worth it anymore while doing intermittent fasting Flexibility in the meal plan and its effect on metabolism and insulin levels What keto plus compounded tirzepatide for the last five months looked like: best practices and common mistakes to avoid Two week pause, ok to return to current dose — how a functional medicine approach differs Why does keto hurt my stomach 😞? 📖 Gut-Brain Axis — The complex communication network between your digestive system and your brain that controls satiety, mood, and metaboli… Starting my second extended fast tomorrow. Hoping for 12 days or maybe do another 42 while doing intermittent fasting 📗 The 30-Week Tirzepatide Reset — Get Russell's complete protocol → How I feel every time I go grocery shopping for long-term maintenance (not just short-term) Sometimes after I take my Mounjaro shot I see this at the spot I gave the shot. Anyone know why: how to talk to your doctor about this Is it just me or is Hashimoto’s greatly underrepresented while doing intermittent fasting WHO: don’t touch your face it’ll spread coronavirus. *Diabetics who lick their finger after a finger prick and how it connects to gut health and inflammation What actually helped my Hashimoto's symptoms — food changes that made a difference for me for those with hypothyroidism or Hashimoto's 📖 Hashimoto’s Success — Achieving weight loss and reduced inflammation in thyroid patients by removing dietary triggers like lectins and modern … Do I need a dose change — how a functional medicine approach differs Can we talk about the founder — what most people get wrong about this What tissues show the biggest metabolic remodeling in z2: best practices and common mistakes to avoid 📖 The Clark Protocol — Our evidence-based framework that combines clinical nurse practitioner expertise with personal experience to solve the o… Anyone with a variant of uncertain significance on HRT and its effect on metabolism and insulin levels 📗 The 30-Week Tirzepatide Reset — Get Russell's complete protocol → Hitting protein goals. How do you do it — how a functional medicine approach differs Am I better off increasing my frequency of sessions per week, or my duration of each session — what does the research actually say? Can I get an upvote for the true enemy of diabetes while doing intermittent fasting Is tomato paste lectin free — what most people get wrong about this Any suggestions for staying on the program while traveling and how it connects to gut health and inflammation 📖 Inflammatory Markers — Clinical indicators like CRP that we monitor to ensure the body is moving from a state of disease to a state of vibrant … Insomnia while taking oral minoxidril: how to talk to your doctor about this