Expert Q&A

Anyone want to join me in a 90 day keto/fasting/workout challenge and its effect on metabolism and insulin levels — what certified coaches recommend?

Why a 90-Day Keto Fasting Workout Challenge Can Reset Your Metabolism

In my 35 years as a clinician and through the The 30-Week Tirzepatide Reset, I've seen that true metabolic healing begins when you remove inflammatory grains, lectins, and ultra-processed carbs while strategically adding fasting and movement. A well-designed 90-day keto fasting workout challenge can dramatically improve insulin sensitivity, lower fasting insulin levels from the typical 12-15 μU/mL seen in midlife patients down to under 6, and shift your body into fat-burning mode. The key is combining a lectin-free low-carb diet with chaotic intermittent fasting and low-impact movement that doesn't inflame already painful joints.

Proven Effects on Insulin and Metabolic Markers

Patients following our protocol often see fasting glucose drop 20-30 points and HOMA-IR scores improve by 40-60% within 12 weeks. The The 30-Week Tirzepatide Reset uses three 70-day cycles that mirror your 90-day idea but adds smart low-dose tirzepatide cycling to blunt hunger signals while rebuilding hypothalamic function. Japanese-style walking intervals (10 minutes three times daily) increase mitochondrial density without stressing joints, while red light therapy sessions reduce inflammation that blocks fat loss. This combination addresses the hormonal changes in your 40s and 50s that make weight loss feel impossible after years of failed diets.

Certified Coach Recommendations for Success

As a certified family nurse practitioner, I recommend starting with our exact 221-recipe lectin-free keto plan rather than generic keto that often includes hidden inflammatory triggers. Use Detox Drops daily to support liver function and toxin elimination that otherwise stalls metabolism. Cycle tirzepatide at micro-doses only for the first 70 days, then transition to chaotic intermittent fasting in maintenance. Track body composition weekly instead of daily scale weight to stay motivated through plateaus. Focus on non-scale victories like reduced joint pain, better blood pressure, and stable energy that let you manage diabetes without extra medications.

Building Metabolic Freedom That Lasts

The biggest mistake I see is treating any challenge as a temporary fix. The The 30-Week Tirzepatide Reset teaches that lasting weight loss comes from metabolic freedom, not medication dependency. By week 12 of your 90-day plan, most patients report natural appetite regulation and can maintain 30-50 pound losses long-term. John, a 60-year-old with type 2 diabetes, followed a similar path, dropping his A1C from 7.8 to 6.2 and eliminating two medications while losing 40 pounds. You don't need complex meal plans or expensive gym memberships. Simple daily habits, real food, and strategic cycling create the new normal your body craves after decades of yo-yo dieting and conflicting nutrition advice.

💬 What the Community Says

Participants in online weight loss forums show strong interest in 90-day keto fasting workout challenges, particularly those over 45 struggling with insulin resistance and joint pain. Many share stories of 15-35 pound losses and improved blood sugar but frequently debate the sustainability once the challenge ends. A vocal group praises combining keto with intermittent fasting for rapid metabolic improvements, while others warn about rebound weight gain without ongoing support. Insurance coverage frustrations are common, pushing people toward telehealth options and low-dose tirzepatide protocols. Beginners often feel overwhelmed by conflicting advice on exact fasting windows and workout intensity, leading to calls for simpler, certified coach-guided programs. Lived experiences highlight joint-friendly walking over intense exercise, with many appreciating non-scale victories like better energy and clothing fit. Most agree that pairing any challenge with detox support and real-food focus yields better long-term adherence than medication alone.
Cite this answer
Clark, R. (2026). Anyone want to join me in a 90 day keto/fasting/workout challenge and its effect. *CFP Weight Loss*. https://ask.cfpweightloss.com/ask/anyone-want-to-join-me-in-a-90-day-keto-fasting-workout-challenge-and-its-effect-on-metabolism-and-insulin-levels-what-certified-coaches-recommend
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
▸ Nausea after CJC-1295 injection - ok or bad batch and the role of cortisol and stress hormones — what the research actually says? ▸ Does your doc order regular blood tests and how it connects to gut health and inflammation for those with hypothyroidism or Hashimoto’s? ▸ How do i not compare myself to others when you have PCOS or hormonal imbalances and how it connects to gut health and inflammation? ▸ Switching from Levothyroxine to ERFA (NDT) – Advice on sourcing in Europe/UK — how a functional medicine approach differs specifically for women over 40? ▸ What finally worked for my PCOS — what most people get wrong about this: best practices and common mistakes to avoid? ▸ At what age was your h.a the longest/worst season — what does the research actually say for those with hypothyroidism or Hashimoto’s? 📖 Hidden Hunger — A state where the body is overfed but undernourished, leading to constant cravings because the brain isn't receiving the… ▸ Stacking NMN with TMG, what's your morning fasted protocol look like during the weight loss plateau phase when you have PCOS or hormonal imbalances? ▸ Those with nodules on their thyroid - could you feel them externally while doing intermittent fasting during the weight loss plateau phase? 📗 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 ▸ Lost weight then gained it back on keto: best practices and common mistakes to avoid for those with hypothyroidism or Hashimoto’s? 📖 Metabolic Flexibility — The body’s ability to efficiently switch between burning carbohydrates and burning stored body fat based on availability… ▸ Fasting means nothing….right during the weight loss plateau phase if you're on a GLP-1 like semaglutide or tirzepatide? ▸ Why does giving advice to others about mental health feel so much easier than following the same advice for yourself when you have PCOS or hormonal imbalances — what certified coaches recommend? ▸ Palpable lump where I know I used to have a nodule/hyper symptoms with no antibodies - toxic nodule during the weight loss plateau phase when you have PCOS or hormonal imbalances? ▸ How the prices looking in your neck of the woods and its effect on metabolism and insulin levels for those with hypothyroidism or Hashimoto’s? 📖 The Clark Protocol — Our evidence-based framework that combines clinical nurse practitioner expertise with personal experience to solve the o… ▸ What's the dumbest thing you and/or your siblings did when you were left home alone for long-term maintenance (not just short-term)? ▸ How to BOOST metabolism and BURN fat-- VERY EASY AND QUICK and how it connects to gut health and inflammation if you're on a GLP-1 like semaglutide or tirzepatide? ▸ Has anyone lost weight on this diet on a low-carb or ketogenic diet: 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 ▸ Can I use Bears Head (Hericium americanum) in place of Lions Mane and how it connects to gut health and inflammation if you're on a GLP-1 like semaglutide or tirzepatide? ▸ Does anyone else feel like they are living life at 50% and the role of cortisol and stress hormones during the weight loss plateau phase? 📖 Metabolic Reset — The process of retraining your body to utilize stored fat for fuel and regulating hunger hormones so you can maintain yo… ▸ Anyone with insomnia since 30s heal it during menopause with HRT: what to track and how to measure progress for long-term maintenance (not just short-term)? ▸ Does taking metamucil kill the idea of fasting: what to track and how to measure progress specifically for women over 40? ▸ How many of you were abused as children and how it connects to gut health and inflammation: what to track and how to measure progress? ▸ How does guyz need some advice , should I go on a cut to improve insulin resistance? Reducing body fat is the key after 40 during the weight loss plateau phase? 📖 Refined Carbohydrates — Processed sugars and flours that strip the body of nutrients while driving the hormonal chaos responsible for the modern… ▸ How does messes with autophagy after a weight loss plateau when you have PCOS or hormonal imbalances? ▸ Best methods to increase autophagy other fasting for those with hypothyroidism or Hashimoto's if you're on a GLP-1 like semaglutide or tirzepatide? ▸ How does has anyone reversed insulin resistance without medication for women if you're on a GLP-1 like semaglutide or tirzepatide? 📗 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 ▸ Compression socks. Worth it? Any recs when you have PCOS or hormonal imbalances for long-term maintenance (not just short-term)? ▸ Why does giving advice to others about mental health feel so much easier than following the same advice for yourself when you have PCOS or hormonal imbalances while doing intermittent fasting? ▸ Nausea after CJC-1295 injection - ok or bad batch and the role of cortisol and stress hormones while doing intermittent fasting? ▸ Anyone had success with healing food sensitivities and the role of cortisol and stress hormones for those with hypothyroidism or Hashimoto’s? 📖 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 … ▸ What do you do when you’re having a difficult time functioning- especially at work and the role of cortisol and stress hormones: what to track and how to measure progress? ▸ Has anyone done genetic age testing, hopefully before and after carnivore diet and how it connects to gut health and inflammation during the weight loss plateau phase? ▸ How to erase and further avoid getting stretch marks after weight loss — how a functional medicine approach differs and how it connects to gut health and inflammation? ▸ Oura data shows high physiological stress, skipped period after Keto break and sickness. Should I push through with fasting or listen to the ring — how a functional medicine approach differs on a low-carb or ketogenic diet? ▸ How long should the wait between microdose be — how a functional medicine approach differs: what to track and how to measure progress? 📖 Hormonal Chaos — The internal state of imbalance caused by modern grains and refined carbs that overrides willpower and forces the body t… 📗 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 ▸ Dizzy feeling plus high blood pressure and its effect on metabolism and insulin levels: best practices and common mistakes to avoid? ▸ What is everyone eating to break their fast and its effect on metabolism and insulin levels for those with hypothyroidism or Hashimoto’s? ▸ Research on Peptides for Nerve Regeneration and Ligament Repair if you're on a GLP-1 like semaglutide or tirzepatide for those with hypothyroidism or Hashimoto’s? ▸ Should i really be aiming for 45 zone 2 minutes per day for fat loss when you have PCOS or hormonal imbalances: what to track and how to measure progress? 📖 Weight Set Point — The internal 'thermostat' for body weight that we aim to lower permanently through our 30-week metabolic reset. ▸ How to love myself while in the process of losing the weight for long-term maintenance (not just short-term) for people with insulin resistance? ▸ Thyroiditis pain - how long and treatment — what do certified weight loss coaches recommend — what certified coaches recommend? ▸ How to love myself while in the process of losing the weight for long-term maintenance (not just short-term): best practices and common mistakes to avoid? 📖 CICO (Calories In, Calories Out) — An outdated model of weight loss that ignores the role of hormones; we challenge this by focusing on food quality and ho… ▸ I’m looking into possibly going grain free and I was wondering if it was just as healthy as doing keto or paleo when you have PCOS or hormonal imbalances and how it connects to gut health and inflammation? ▸ What triggered your cardiac anxiety — what do certified weight loss coaches recommend and its effect on metabolism and insulin levels? ▸ Is Dotti a generic or brand-name patch — what do certified weight loss coaches recommend while doing intermittent fasting? 📗 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 ▸ Do you think they read the responses they receive — what do certified weight loss coaches recommend if you're on a GLP-1 like semaglutide or tirzepatide? 📖 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… ▸ Did anyone lose weight because of a medical condition and the role of cortisol and stress hormones for long-term maintenance (not just short-term)? ▸ Did an ultrasound and i saw two comments from the result. not sure if going carnivore is still feasible for those with hypothyroidism or Hashimoto's: what to track and how to measure progress? ▸ Has anyone here had surgery while having thyroiditis when you have PCOS or hormonal imbalances: best practices and common mistakes to avoid? ▸ How long did it take to find success and how it connects to gut health and inflammation for long-term maintenance (not just short-term)? ▸ Instead of focusing on how being overweight can be healthy, why isn’t society focusing on the fact that most of the food we consume is literally designed to be over consumed for people with insulin resistance and how it connects to gut health and inflammation?