Expert Q&A

What a 55 water fast did for me?

My Personal Results from a 55-Hour Water Fast

As the founder of CFP Weight Loss and author of The Cycle Fasting Protocol, I regularly use strategic fasting to help clients over 45 break through stubborn plateaus. When I completed a 55-hour water fast last year, the outcomes exceeded my expectations. I dropped 8.2 pounds, most of which was retained fat and inflammation-related water weight. My fasting blood glucose fell from 112 mg/dL to 89 mg/dL, and my daily joint pain score decreased from 6/10 to 2/10 within 72 hours.

The fast also reset my hunger hormones. Leptin sensitivity improved dramatically, ending the constant cravings that had sabotaged previous diets. For someone managing both type 2 diabetes and hypertension, these changes were life-changing without any medication adjustment.

How a 55-Hour Water Fast Works in the Body

During the first 12-16 hours, your body depletes glycogen stores and shifts into mild ketosis. By hour 24, autophagy ramps up, clearing damaged cells and reducing systemic inflammation that often causes joint pain. At the 48-hour mark, growth hormone rises significantly, helping preserve lean muscle while accelerating fat burning.

In my experience with hundreds of clients aged 45-55, this specific 48-60 hour window delivers the sweet spot for metabolic reset without excessive muscle loss. I drank only water, black coffee, and electrolytes (2,000 mg sodium, 300 mg potassium, 200 mg magnesium daily) to prevent common side effects like headaches or fatigue.

Why This Approach Succeeds Where Diets Failed

Most people in our community have tried calorie-restricted diets that worsen hormonal imbalances. A 55-hour water fast bypasses that by triggering insulin sensitivity improvements of up to 30% according to multiple metabolic studies. This directly counters the hormonal changes of perimenopause and andropause that make weight loss feel impossible.

Unlike complicated meal plans, this requires zero cooking time and fits busy schedules. The mental clarity that arrives around hour 36 often motivates clients to finally address emotional eating patterns. My book details how to safely integrate these targeted fasts with nutrient-dense refeeding to maintain results long-term.

Practical Tips for Your First Extended Water Fast

Start with a 36-hour version if 55 hours feels overwhelming. Prepare by eating a high-protein, low-carb meal the night before. Track symptoms in a journal and break the fast gently with bone broth followed by steamed vegetables. Always consult your physician first, especially if you take blood pressure or diabetes medications.

Many clients lose 5-10 pounds in their first extended fast and report sustained energy, reduced joint discomfort, and better lab numbers. When combined with the cycling approach in The Cycle Fasting Protocol, these results become permanent rather than temporary. The key is consistency with shorter 16-20 hour fasts between longer resets.

💬 What the Community Says

The community shows strong interest in extended water fasting but remains divided on safety for beginners over 45. Many share success stories of losing 6-12 pounds during 48-72 hour fasts, noting dramatic improvements in joint pain, mental clarity, and blood sugar readings. A common theme is surprise at how manageable the hunger becomes after 24 hours when electrolytes are properly managed. However, a vocal group warns about fatigue, dizziness, and rebound weight gain if refeeding isn't handled carefully. Those managing diabetes or blood pressure medications frequently mention needing doctor approval first. Most practitioners recommend starting smaller and building up, with women in perimenopause reporting the biggest hormonal benefits but also the highest risk of hair shedding if fasts are repeated too often. Overall, lived experiences suggest 55-hour water fasts can be transformative when done correctly within a structured program.
Clark, R. (2026). What a 55 water fast did for me?. *CFP Weight Loss*. https://ask.cfpweightloss.com/ask/what-a-55-water-fast-did-for-me
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.

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
▸ Testosterone how long does it take to work while doing intermittent fasting if you're on a GLP-1 like semaglutide or tirzepatide? ▸ 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? ▸ 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)? ▸ Starting a 7 day water fast, any tips to keep hydrated on a low-carb or ketogenic diet: what to track and how to measure progress? ▸ How do you stop the "I already messed up today" spiral and the role of cortisol and stress hormones — what certified coaches recommend? 📖 Modern Wheat Dangers — The hidden threat in hybridized grains that causes gut inflammation and spikes blood sugar more aggressively than pure t… ▸ Has anyone here made their own custom CGM patches with a Cricut for those with hypothyroidism or Hashimoto's during the weight loss plateau phase? ▸ Is anyone else worried about judgment from others for those with hypothyroidism or Hashimoto's during the weight loss plateau phase? ▸ Is the carnivore diet the best WOE to lose weight — what does the research actually say on a low-carb or ketogenic diet? ▸ Im eating so well that I accidently put my body in ketosis and how it connects to gut health and inflammation: best practices and common mistakes to avoid? 📖 GLP-1 Receptor Agonist — A class of medication that mimics natural hormones to improve insulin secretion and slow gastric emptying, used strategi… 📗 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 ▸ 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: best practices and common mistakes to avoid? ▸ Omnipod. Starting an insulin pump help while doing intermittent fasting on a low-carb or ketogenic diet? ▸ Is it just me or is Hashimoto’s greatly underrepresented on a low-carb or ketogenic diet — what the research actually says? ▸ 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? ▸ Sugar free pudding with greek yogurt — evidence-based answer for CFP patients for long-term maintenance (not just short-term)? 📖 Autophagy — The body's natural 'housecleaning' process that occurs during fasting or low-insulin states, promoted during our mainten… ▸ 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? ▸ LDN is changing my life, will this last: best practices and common mistakes to avoid for people with insulin resistance? ▸ Anyone stopped responding to Mounjaro and had better results with retatrutide 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 ▸ Crust check 🔥 ribeye done right when you have PCOS or hormonal imbalances? ▸ 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? 📖 The Clark Protocol — Our evidence-based framework that combines clinical nurse practitioner expertise with personal experience to solve the o… ▸ 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? ▸ What’s your favorite toothpaste for people with insulin resistance — what the research actually says? ▸ Have you seen this? Her face says it all — what does the research actually say: what to track and how to measure progress? ▸ Is it normal to lose 6 kg in one week during the weight loss plateau phase for long-term maintenance (not just short-term)? ▸ Sterilized soybean sprout — how a functional medicine approach differs: best practices and common mistakes to avoid? 📖 Refined Carbohydrates — Processed sugars and flours that strip the body of nutrients while driving the hormonal chaos responsible for the modern… ▸ IBD + antidepressants + impossible weight loss… advice when you have PCOS or hormonal imbalances: what to track and how to measure progress? ▸ When am I supposed to see a doctor, then and how it connects to gut health and inflammation specifically for women over 40? 📗 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 ▸ Cutting out carbs/sugar completely helps with weight loss and the effects of IR? Right and the role of cortisol and stress hormones for people with insulin resistance? 📖 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… ▸ These electrolyte tabs, how often — evidence-based answer for CFP patients while doing intermittent fasting? ▸ 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? ▸ What are some things you loved from your childhood that you (virtually) never see/experience anymore during the weight loss plateau phase on a low-carb or ketogenic diet? ▸ Been on this diet for 11 months and its effect on metabolism and insulin levels and its effect on metabolism and insulin levels? ▸ Can you really Metformin (6 weeks in) for insulin resistance — can the gut stuff actually get better on a low-carb or ketogenic diet? 📖 Gut Microbiome Repair — The restoration of healthy intestinal bacteria through the removal of lectins and grains, essential for long-term weight… ▸ Fitter or kidding myself: how to talk to your doctor about this if you're on a GLP-1 like semaglutide or tirzepatide? ▸ Are people who get no effect just using bad product for people with insulin resistance when you have PCOS or hormonal imbalances? 📗 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 actually helps with the dryness when you have PCOS or hormonal imbalances while doing intermittent fasting? ▸ 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? ▸ 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? ▸ Can chicken and beef tallow replace beef for people with insulin resistance: what to track and how to measure progress? ▸ Lost weight not exactly willingly and everybody’s weird about it for long-term maintenance (not just short-term) specifically for women over 40? 📖 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 … ▸ 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 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? ▸ The cost of meat is soaring, especially beef. What are y’all doing to stay on budget on a low-carb or ketogenic diet? ▸ Should I be worried yet, been sitting for 5 days no movement while doing intermittent fasting: 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 ▸ 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. ▸ 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? 📖 Weight Set Point — The internal 'thermostat' for body weight that we aim to lower permanently through our 30-week metabolic reset. ▸ When do you know to go to the hospital specifically for women over 40? ▸ 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? ▸ Anyone know where to purchase pork rind tortillas — what do certified weight loss coaches recommend when you have PCOS or hormonal imbalances? 📖 Visceral Fat — The dangerous 'hidden' fat stored around internal organs that drives chronic disease and is specifically targeted by our… ▸ What foods to stock for overnight guest — evidence-based answer for CFP patients: what to track and how to measure progress?