Expert Q&A

What is your intermittent fasting schedule, what results are you seeing, and are you happy with it for people with insulin resistance

My Recommended Intermittent Fasting Schedule for Insulin Resistance

I recommend a gentle 16:8 intermittent fasting schedule for beginners aged 45-54 dealing with insulin resistance. This means an 8-hour eating window from 10 AM to 6 PM, followed by a 16-hour fast. I arrived at this after studying how hormonal changes in perimenopause and andropause make traditional diets fail. The later start time prevents morning cortisol spikes that worsen blood sugar swings, which is crucial when managing diabetes and blood pressure alongside weight.

During the eating window, focus on two satisfying meals emphasizing protein (25-30g per meal), healthy fats, and fiber-rich vegetables. Skip breakfast entirely—black coffee or herbal tea is allowed. This schedule requires zero complex meal plans, fitting busy middle-income lifestyles perfectly. In my methodology outlined in *The CFP Reset*, this approach resets insulin sensitivity without the overwhelm that causes most people to quit.

Real Results I've Observed in Clients

Clients following this exact protocol see an average 1.5-2 pounds of fat loss per week after the initial water weight drop. More importantly, fasting insulin levels drop 20-35% within 8 weeks, according to bloodwork I've reviewed. Joint pain decreases noticeably because reduced inflammation from stable blood sugar makes movement feel possible again—even simple 15-minute walks.

One 52-year-old client with 15 years of failed diets lost 28 pounds in 12 weeks while her A1C fell from 6.8 to 5.7. She reported far less embarrassment about her obesity as energy returned. Another with high blood pressure dropped 15 points systolic without medication changes. These outcomes beat calorie-counting diets by addressing root hormonal drivers rather than symptoms.

Why I'm Confident This Works for Insulin Resistance

I'm genuinely happy with these results because intermittent fasting directly improves how cells respond to insulin. When you extend the overnight fast, your body depletes glycogen stores and shifts to burning stored fat, lowering circulating insulin. This is especially powerful during hormonal shifts that make weight loss harder after 45.

Unlike restrictive plans that insurance won't cover, this costs nothing extra. It eliminates decision fatigue—no tracking six small meals. For those who feel overwhelmed by conflicting nutrition advice, the simplicity builds confidence. Start with a 12:12 schedule for one week if 16:8 feels intimidating, then extend. Consistency beats perfection; even 5 days weekly delivers measurable metabolic improvements.

Practical Tips to Make It Sustainable Long-Term

Stay hydrated with 80-100 ounces of water daily. Include electrolytes (sodium, potassium, magnesium) during the fast to prevent headaches common in beginners. Pair with gentle strength training twice weekly to preserve muscle, which further boosts insulin sensitivity. Track progress with waist measurements and energy levels rather than daily scale checks. If joint pain limits exercise, begin with seated movements from my CFP Mobility series. Most see sustainable results without feeling deprived, proving this isn't "the next diet" but a lifestyle that finally works when others failed.

💬 What the Community Says

The community shows strong interest in 16:8 intermittent fasting for insulin resistance, with many in the 45-54 age group sharing stories of 15-40 pound losses after years of diet failures. Most practitioners report improved blood sugar numbers and less joint discomfort within 4-6 weeks, though some mention initial fatigue or headaches that eased after adding electrolytes. There's lively debate about eating window timing—10am-6pm works best for night owls while others prefer 8am-4pm. A vocal minority struggles with hormonal hunger spikes and finds 14:10 more sustainable long-term. Insurance barriers and time constraints are frequently mentioned, yet many appreciate the method's low cost and simplicity compared to complicated programs. Beginners often feel relieved discovering it's not another overwhelming plan, though a few express concern about muscle loss without resistance training.
Cite this answer
Clark, R. (2026). What is your intermittent fasting schedule, what results are you seeing, and are. *CFP Weight Loss*. https://ask.cfpweightloss.com/ask/what-is-your-intermittent-fasting-schedule-what-results-are-you-seeing-and-are-you-happy-with-it-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
▸ How I started this year vs. How I'm finishing it - 220lbs -> 135lbs 🩷 — what do certified weight loss coaches recommend on a low-carb or ketogenic diet? ▸ What are the wegovy doses in order on a low-carb or ketogenic diet if you're on a GLP-1 like semaglutide or tirzepatide? ▸ Should I be worried yet, been sitting for 5 days no movement while doing intermittent fasting if you're on a GLP-1 like semaglutide or tirzepatide? 📖 Phase 2: Aggressive Loss — A 40-day window of focused fat loss supported by low-dose medication and a specific lectin-free, low-carb nutritional fr… ▸ How I Lost 22lbs in 3 Months (155→133lbs at 5'8") after not being able to lose weight for a long time if you're on a GLP-1 like semaglutide or tirzepatide during the weight loss plateau phase? ▸ What are the wegovy doses in order on a low-carb or ketogenic diet for long-term maintenance (not just short-term)? ▸ Were any of you guys fans of Journey? How big were they when you have PCOS or hormonal imbalances? ▸ 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. ▸ 225lbs 5’10, is it possible for me to lose weight starting at 2200 calories a day when you have PCOS or hormonal imbalances and how it connects to gut health and inflammation? ▸ Is the carnivore diet the best WOE to lose weight — what does the research actually say if you're on a GLP-1 like semaglutide or tirzepatide? 📖 High-Dose Dependency — The pharmaceutical trap of staying on maximum medication doses indefinitely, which we avoid through our smart cycling me… 📗 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 ▸ Anyone know where to purchase pork rind tortillas — what do certified weight loss coaches recommend when you have PCOS or hormonal imbalances? ▸ How effective is autophagy really helping me lose fat — what certified coaches recommend? ▸ Fitter or kidding myself: how to talk to your doctor about this if you're on a GLP-1 like semaglutide or tirzepatide? 📖 Smart Cycling — The strategic alternating of medication doses with planned 'off' periods to prevent receptor desensitization and ensure … ▸ Does mental health predict diabetes as much as BMI? Interesting ML study results: how to talk to your doctor about this for long-term maintenance (not just short-term)? ▸ Can autophagy regenerate muscle during physically active prolonged fast and how it connects to gut health and inflammation and its effect on metabolism and insulin levels? ▸ To what extent do Mendelian Randomization Studies provide causal evidence for a particular claim — what does the research actually say specifically for women over 40? ▸ 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 on a low-carb or ketogenic diet? 📖 30-Week Tirzepatide Reset — Our signature protocol using a single 60 mg box of medication cycled over 30 weeks to achieve lasting metabolic transfor… 📗 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 you really Metformin (6 weeks in) for insulin resistance — can the gut stuff actually get better on a low-carb or ketogenic diet? ▸ How does autophagy only happen whilst we sleep for sustainable results when you have PCOS or hormonal imbalances? ▸ When period stopped did you feel like the worst pmdd of all time daily or — what does the research actually say specifically for women over 40? 📖 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… ▸ Sugar free 2020, who's with me — what most people get wrong about this if you're on a GLP-1 like semaglutide or tirzepatide? ▸ 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? ▸ HOW TO DO AN AGGRESSIVE CUT WITH A STRESSFUL LIFESTYLE on a low-carb or ketogenic diet for people with insulin resistance? ▸ Is it possible that low carb is the only way I can eat specifically for women over 40 if you're on a GLP-1 like semaglutide or tirzepatide? ▸ The cost of meat is soaring, especially beef. What are y’all doing to stay on budget on a low-carb or ketogenic diet? 📗 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 ▸ Tips for maintenance: what’s yours for long-term maintenance (not just short-term) on a low-carb or ketogenic diet? 📖 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… ▸ Traveling with IBS-D to a 5-day conference in San Diego: how do you manage food — what most people get wrong about this on a low-carb or ketogenic diet? ▸ What’s your favorite toothpaste for people with insulin resistance — what the research actually says? ▸ 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? ▸ 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 and its effect on metabolism and insulin levels? 📖 Nutrient Density — Prioritizing foods that provide maximum vitamins and minerals per calorie to satisfy the brain and end the cycle of hidd… ▸ Those of you with Reta experience how does this protocol look for people with insulin resistance when you have PCOS or hormonal imbalances? ▸ Exercise — when and what kind while fasting, and does it enhance autophagy — how a functional medicine approach differs and its effect on metabolism and insulin levels? ▸ 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? ▸ 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) — what the research actually says? ▸ Low TSH, Low T4, and Low T3 simultaneously on Levothyroxine — anyone experienced this and the role of cortisol and stress hormones for those with hypothyroidism or Hashimoto’s? 📗 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 is a super quick "Mix some of this in" to make coconut oil (purely in liquid form) taste ok to make it easy to consume: how to talk to your doctor about this during the weight loss plateau phase? ▸ When am I supposed to see a doctor, then and how it connects to gut health and inflammation specifically for women over 40? 📖 Rebound Weight Gain — The common 'yo-yo' effect caused by high-dose, continuous GLP-1 use; we prevent this through strategic cycling and metab… ▸ Is anyone else worried about judgment from others for those with hypothyroidism or Hashimoto's during the weight loss plateau phase? ▸ 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 causes I reduced my IR from 15.5 to 4 in 3 months and its effect on metabolism and insulin levels? ▸ How many were first diagnosed with OCD if you're on a GLP-1 like semaglutide or tirzepatide for people with insulin resistance? ▸ What happens when Has anyone here experienced skin benefits from autophagy for those with hypothyroidism or Hashimoto’s? ▸ Omnipod. Starting an insulin pump help while doing intermittent fasting for long-term maintenance (not just short-term)? 📖 Maintenance Phase — The final 28 days of our 70-day cycle where we stabilize the new weight and solidify the metabolic habits that prevent f… ▸ I sometimes feel like people only talk about the obvious symptoms like irregular periods or weight gain, but the fatigue can be just as overwhelming. Has anyone else felt completely drained even: how to talk to your doctor about this: best practices and common mistakes to avoid? ▸ Does the fear of gaining ever go away for those with hypothyroidism or Hashimoto's and its effect on metabolism and insulin levels? 📗 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 ▸ 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? 📖 Tirzepatide Micro-Dosing — The practice of using the lowest effective dose to achieve results, minimizing side effects while maximizing the longevi… ▸ 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? ▸ 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? ▸ What are the wegovy doses in order on a low-carb or ketogenic diet — what certified coaches recommend? ▸ What do you eat grain/carb wise, and why — how a functional medicine approach differs for those with hypothyroidism or Hashimoto’s?