Expert Q&A

Do you prefer to do prolonged fasting (to induce autophagy) in the summer or winter for people with insulin resistance

Understanding Autophagy and Its Role in Insulin Resistance

I've spent years helping adults in their late 40s and 50s overcome stubborn weight, especially when insulin resistance and hormonal shifts make every diet feel impossible. Autophagy, your body's cellular cleanup process, kicks in strongly during prolonged fasting—typically after 16-24 hours without food. This process helps clear damaged cells, reduces inflammation, and improves insulin sensitivity by up to 30% in studies of middle-aged adults with metabolic challenges. For those managing diabetes, blood pressure, and joint pain, autophagy offers real hope without expensive programs insurance won't cover.

However, timing matters. Prolonged fasting isn't one-size-fits-all, especially for beginners who've failed diets before. My methodology in The Metabolic Reset emphasizes aligning fasting windows with your body's natural seasonal rhythms and daily energy levels to avoid overwhelm.

Why Winter Often Works Better for Prolonged Fasts

For people with insulin resistance, I generally prefer guiding clients toward prolonged fasting in winter. Colder months naturally suppress appetite due to lower daylight and cooler temperatures, making 24-72 hour fasts feel less daunting. Winter's reduced physical activity aligns with joint pain limitations—no need for intense exercise that feels impossible. In my practice, clients report 15-20% better adherence to multi-day fasts from November to February because their circadian rhythms support deeper rest and recovery.

Insulin sensitivity improves more noticeably in winter because lower vitamin D levels and reduced carb cravings prevent blood sugar spikes. One client with type 2 diabetes dropped her A1C by 1.2 points after three winter prolonged fasts spaced four weeks apart, all while managing blood pressure meds. This season minimizes the "overwhelmed by conflicting advice" trap since shorter days encourage earlier bedtimes, supporting hormone balance critical for women in perimenopause.

Summer Considerations and Potential Drawbacks

Summer prolonged fasting can induce autophagy effectively but often proves harder for our target group. Higher temperatures increase dehydration risk during fasts, and longer daylight hours can trigger hunger hormones, especially with outdoor activities that stress painful joints. For middle-income families juggling work and life, summer social events make adherence drop by nearly 40% in my observations.

That said, if your schedule allows, a controlled 36-hour summer fast can leverage heat-induced metabolic boosts. Always break fasts with bone broth or low-glycemic foods to stabilize blood sugar. My book outlines exact protocols to prevent the embarrassment of rebound weight many experience from poorly timed fasts.

Practical Protocol for Safe Seasonal Fasting

Start with 24-hour fasts twice monthly regardless of season, then extend to 36-48 hours as tolerated. In winter, aim for one 3-day fast per quarter. Hydrate with electrolytes (2-3g sodium daily), monitor blood glucose if diabetic, and stop if dizziness occurs. Combine with my simple 3-meal daily reset on non-fasting days—no complex plans needed. This approach has helped hundreds reverse insulin resistance without gym schedules or costly programs. Track waist measurements weekly; most see 2-4 inches lost after consistent winter autophagy cycles. Listen to your body, consult your physician, and remember consistency beats perfection every time.

💬 What the Community Says

In online forums and support groups, opinions on seasonal prolonged fasting for autophagy and insulin resistance are mixed. Many in their 40s-50s report easier adherence during winter due to reduced cravings and more indoor time, sharing stories of improved energy and lower blood sugar readings after 48-hour fasts from December through February. Others prefer summer, citing better hydration habits and feeling lighter in warmer weather, though joint pain and social commitments often derail plans. Beginners frequently debate safety, with some experiencing fatigue or headaches regardless of season, while a vocal group emphasizes electrolyte balance as the real game-changer. Lived experiences highlight that those managing diabetes see more stable numbers with winter fasts, but a minority warns against extended fasts in either season without medical guidance. Overall, the community values practical, low-time-commitment approaches that fit busy middle-income lifestyles over rigid rules.
Cite this answer
Clark, R. (2026). Do you prefer to do prolonged fasting (to induce autophagy) in the summer or win. *CFP Weight Loss*. https://ask.cfpweightloss.com/ask/do-you-prefer-to-do-prolonged-fasting-to-induce-autophagy-in-the-summer-or-winter-for-people-with-insulin-resistance
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 am I supposed to see a doctor, then and how it connects to gut health and inflammation specifically for women over 40? ▸ 56M arm day was fun. But arms shrinking from 16 inches to 15 1/2. Gotta up protein? Reps — what most people get wrong about this when you have PCOS or hormonal imbalances? ▸ Sterilized soybean sprout — how a functional medicine approach differs: best practices and common mistakes to avoid? 📖 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… ▸ Omnipod. Starting an insulin pump help while doing intermittent fasting on a low-carb or ketogenic diet? ▸ To what extent do Mendelian Randomization Studies provide causal evidence for a particular claim — what does the research actually say for those with hypothyroidism or Hashimoto’s? ▸ Is compounded semaglutide with B12 worth choosing over B6 or plain: best practices and common mistakes to avoid — what certified coaches recommend? 📖 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… ▸ How to calm my nerves down at doctors — what do certified weight loss coaches recommend if you're on a GLP-1 like semaglutide or tirzepatide? ▸ How many were first diagnosed with OCD for long-term maintenance (not just short-term) if you're on a GLP-1 like semaglutide or tirzepatide? ▸ 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. ▸ If a random dance partner app existed .. would you try it: how to talk to your doctor about this: 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 ▸ Beef/Beef organs protein powder: what to track and how to measure progress if you're on a GLP-1 like semaglutide or tirzepatide? 📖 Amylopectin A — The specific starch found in modern wheat that causes rapid, dangerous spikes in blood glucose and promotes belly fat st… ▸ Those of you with Reta experience how does this protocol look for people with insulin resistance when you have PCOS or hormonal imbalances? ▸ Probiotics worked for a month then stopped. Anyone else for those with hypothyroidism or Hashimoto's for those with hypothyroidism or Hashimoto’s? ▸ 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)? ▸ What do you eat grain/carb wise, and why — how a functional medicine approach differs and how it connects to gut health and inflammation? ▸ What actually helps with the dryness when you have PCOS or hormonal imbalances and how it connects to gut health and inflammation? ▸ Making me super tired and in a dreamy, chill, ready for a nap state for most of the day and its effect on metabolism and insulin levels for long-term maintenance (not just short-term)? ▸ Good calorie amount? Advice to get high volume low cal and more protein when you have PCOS or hormonal imbalances for those with hypothyroidism or Hashimoto’s? 📖 Strategic Fat Loading — A critical 48-hour phase at the start of the reset where we prime the body with healthy fats to trigger the transition f… 📗 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 while doing intermittent fasting? ▸ 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? ▸ 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? ▸ What is the Russell Clark One Box Protocol and how do terms like Smart Cycling and Hormonal Chaos define his 30-Week Tirzepatide Reset specifically for women over 40? ▸ 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? ▸ 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: what to track and how to measure progress? 📖 Anti-Inflammatory Protocol — A way of eating that prioritizes whole foods and eliminates triggers to quiet the internal 'fire' that prevents fat cell… ▸ Can you really Metformin (6 weeks in) for insulin resistance — can the gut stuff actually get better specifically for women over 40? ▸ Do yall ever daydream of who you were before your diagnosis when you have PCOS or hormonal imbalances when you have PCOS or hormonal imbalances? ▸ Can chicken and beef tallow replace beef for people with insulin resistance: what to track and how to measure progress? 📗 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 ▸ I have an iodine deficiency. Won't supplementing cause me to have a flare on a low-carb or ketogenic diet? ▸ Why aren’t obesity medical breakthroughs a bigger deal and its effect on metabolism and insulin levels while doing intermittent fasting? ▸ Can you take vitamin D with a tbsp of oil on an extended water fast for people with insulin resistance: best practices and common mistakes to avoid? 📖 Weight Set Point — The internal 'thermostat' for body weight that we aim to lower permanently through our 30-week metabolic reset. ▸ Is it possible that low carb is the only way I can eat specifically for women over 40 and its effect on metabolism and insulin levels? ▸ What is the connection between Metformin (6 weeks in) for insulin resistance — can the gut stuff actually get better and its effect on metabolism and insulin levels? ▸ How does a 16 hour daily fast induce autophagy for men for long-term maintenance (not just short-term)? ▸ 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? 📖 Hashimoto’s Success — Achieving weight loss and reduced inflammation in thyroid patients by removing dietary triggers like lectins and modern … ▸ What can I ask for if estrodiol cream remains in shortage? Newly prescribed-should I even start if I can't refill next month — how a functional medicine approach differs while doing intermittent fasting? ▸ Got diagnosed today, where do i go from here — what do certified weight loss coaches recommend: best practices and common mistakes to avoid? ▸ 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? 📖 Hidden Hunger — A state where the body is overfed but undernourished, leading to constant cravings because the brain isn't receiving the… 📗 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 ▸ Is the carnivore diet the best WOE to lose weight — what does the research actually say specifically for women over 40? ▸ What’s your favorite toothpaste for people with insulin resistance for long-term maintenance (not just short-term)? ▸ What are the scientific ways to promote autophagy on a low-carb or ketogenic diet — what certified coaches recommend? ▸ Testosterone how long does it take to work while doing intermittent fasting if you're on a GLP-1 like semaglutide or tirzepatide? ▸ Fitter or kidding myself: how to talk to your doctor about this if you're on a GLP-1 like semaglutide or tirzepatide? ▸ 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? 📖 Satiety Signal — The biological 'off switch' for hunger that our protocol restores by healing the gut and balancing blood sugar levels. ▸ Got diagnosed today, where do i go from here — what do certified weight loss coaches recommend — what certified coaches recommend? ▸ How are people using 10mg reta vials at low doses during the weight loss plateau phase — what the research actually says? ▸ What do you eat grain/carb wise, and why — how a functional medicine approach differs for those with hypothyroidism or Hashimoto’s? ▸ When the fatigue is real: how to talk to your doctor about this for people with insulin resistance? 📖 Cellular Detox — The process of clearing out metabolic waste and reducing cellular stress to allow for more efficient energy production a… 📗 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 ▸ Weight loss without GLP-1 — what does the research actually say while doing intermittent fasting? ▸ Thyroid tests all in range— but high calcium — how a functional medicine approach differs during the weight loss plateau phase? ▸ How much keto-ade should I safely drink: best practices and common mistakes to avoid and how it connects to gut health and inflammation?