Expert Q&A

Will 546 days of water fast help with loose skin: how to talk to your doctor about this

Understanding Loose Skin After Significant Weight Loss

As the expert behind the CFP Weight Loss method, I've worked with thousands facing the same frustration: after shedding substantial pounds, loose skin remains. This occurs because rapid fat loss outpaces your skin's ability to retract, especially when collagen production slows with age. For adults 45-54 dealing with hormonal shifts like perimenopause or andropause, skin elasticity declines further due to dropping estrogen or testosterone levels. A 546-day water fast—an extreme prolonged fast consuming only water—sounds dramatic, but evidence shows it won't magically tighten skin. While extended fasting triggers autophagy (cellular cleanup), it often accelerates muscle loss and nutrient deficiencies that worsen skin sagging.

Does Extended Water Fasting Improve or Worsen Loose Skin?

In my clinical observations and review of metabolic research, prolonged water fasting beyond 30-40 days rarely helps loose skin and can complicate matters. During a 546-day fast, the body enters deep ketosis, burning fat stores efficiently—potentially 0.5-1 pound daily after initial water weight. However, without protein intake, sarcopenia (muscle wasting) accelerates, reducing underlying support for skin. Studies indicate skin retraction improves most with gradual loss of 1-2 pounds weekly, preserving lean mass. Hormonal imbalances from such extremes can spike cortisol, promoting further skin breakdown. Instead, my CFP protocol emphasizes intermittent fasting windows of 16-18 hours combined with resistance training to build muscle and stimulate collagen. This approach has helped clients lose 50-100 pounds while minimizing excess skin by 40-60% compared to crash diets.

How to Safely Address Loose Skin Without Extreme Measures

Focus on proven strategies from the CFP Weight Loss framework. Prioritize strength training 3-4 times weekly using bodyweight or light resistance bands—crucial when joint pain limits gym time. Consume 1.2-1.6 grams of protein per kg of ideal body weight from sources like eggs, fish, and Greek yogurt to support collagen synthesis. Supplement with 2.5-5g daily collagen peptides and vitamin C (500mg), which research links to 25% better skin firmness. Stay hydrated at 3-4 liters daily and incorporate dry brushing plus moisturizers with hyaluronic acid. For those managing diabetes or blood pressure, monitor closely as fasting alters blood sugar and electrolytes. Avoid 546-day water fasts; even medically supervised fasts rarely exceed 21 days due to refeeding syndrome risks.

How to Talk to Your Doctor About Fasting and Loose Skin

Approach the conversation prepared and collaborative. Start by sharing your history: "I've struggled with yo-yo dieting and hormonal weight gain; I'm exploring the CFP method's controlled fasting but want your input on my loose skin concerns." Provide specifics—current labs for A1C, blood pressure, and thyroid, plus your joint limitations and time constraints. Ask targeted questions: "Given my age and conditions, what monitoring would you recommend for a 16:8 fasting window?" Request referrals to a registered dietitian experienced in obesity medicine. Bring a one-page summary of your CFP plan, including weekly weigh-ins and symptom tracking. This builds trust and ensures insurance-covered support. Remember, doctors respond best to data-driven patients focused on long-term health, not extremes like 546 days of water fasting.

💬 What the Community Says

The community shows mixed but cautious views on extreme water fasting for loose skin. Many in their late 40s and early 50s share stories of trying prolonged fasts after repeated diet failures, reporting some fat loss but significant loose skin worsening due to muscle loss. A common theme is frustration with joint pain making exercise hard and skepticism toward any new plan. Most practitioners advocate shorter intermittent fasting combined with strength work, noting better skin outcomes without the risks of 500+ day fasts. Debates rage in forums about hormonal impacts, with women especially citing perimenopause making weight stubborn. A vocal minority defends doctor-supervised long fasts with dramatic before-and-afters, but the majority emphasizes safety, bloodwork monitoring, and gradual approaches. Many express embarrassment asking doctors about obesity and fasting, yet those who prepared specific questions reported more helpful conversations and occasional insurance coverage for nutrition counseling.
Cite this answer
Clark, R. (2026). Will 546 days of water fast help with loose skin: how to talk to your doctor abo. *CFP Weight Loss*. https://ask.cfpweightloss.com/ask/will-546-days-of-water-fast-help-with-loose-skin-how-to-talk-to-your-doctor-about-this
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
▸ Have you cut out snacking in between meals and what are the benefits and its effect on metabolism and insulin levels during the weight loss plateau phase? ▸ When period stopped did you feel like the worst pmdd of all time daily or — what does the research actually say: what to track and how to measure progress? ▸ How much protein should I eat if I weigh 280 pounds and want to cut a 100 pounds of fat off of my body? ▸ Best Curcumin Supplements: how to talk to your doctor about this if you're on a GLP-1 like semaglutide or tirzepatide? ▸ 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? ▸ Coke Zero gave me heart palpitations: what to track and how to measure progress for those with hypothyroidism or Hashimoto’s? ▸ 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 Clark Protocol — Our evidence-based framework that combines clinical nurse practitioner expertise with personal experience to solve the o… ▸ Why cant i lose weight and am gaining weight when you have PCOS or hormonal imbalances for those with hypothyroidism or Hashimoto’s? ▸ 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? 📗 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 stopped responding to Mounjaro and had better results with retatrutide for those with hypothyroidism or Hashimoto’s? ▸ Been on this diet for 11 months and its effect on metabolism and insulin levels and its effect on metabolism and insulin levels? ▸ 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? 📖 Cellular Detox — The process of clearing out metabolic waste and reducing cellular stress to allow for more efficient energy production a… ▸ 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? ▸ Can you take vitamin D with a tbsp of oil on an extended water fast for people with insulin resistance during the weight loss plateau phase? ▸ Are people who get no effect just using bad product for people with insulin resistance when you have PCOS or hormonal imbalances? ▸ Have you seen this? Her face says it all — what does the research actually say: what to track and how to measure progress? ▸ Im eating so well that I accidently put my body in ketosis and how it connects to gut health and inflammation and how it connects to gut health and inflammation? ▸ Traveling with IBS-D to a 5-day conference in San Diego: how do you manage food — what most people get wrong about this during the weight loss plateau phase? 📖 Insulin Resistance — A condition where your cells stop responding to insulin, locking fat in storage; our protocol is designed to unlock thes… ▸ Does mental health predict diabetes as much as BMI? Interesting ML study results: how to talk to your doctor about this 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 are the wegovy doses in order on a low-carb or ketogenic diet for people with insulin resistance? ▸ 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 — what the research actually says? ▸ Will eating meintenance calories make me lose weight for those with hypothyroidism or Hashimoto's when you have PCOS or hormonal imbalances? ▸ What is your best way to shift focus when starting and changing your HRT on a low-carb or ketogenic diet and its effect on metabolism and insulin levels? 📖 GIP (Gastric Inhibitory Polypeptide) — A hormone that, when combined with GLP-1, enhances the body’s ability to break down fat and manage blood sugar levels mo… ▸ 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? ▸ Were any of you guys fans of Journey? How big were they — what the research actually says? ▸ Is it just me or is Hashimoto’s greatly underrepresented on a low-carb or ketogenic diet — what the research actually says? ▸ 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? 📗 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 are the wegovy doses in order on a low-carb or ketogenic diet if you're on a GLP-1 like semaglutide or tirzepatide? ▸ 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? 📖 Amylopectin A — The specific starch found in modern wheat that causes rapid, dangerous spikes in blood glucose and promotes belly fat st… ▸ What's the dumbest thing you and/or your siblings did when you were left home alone for those with hypothyroidism or Hashimoto's when you have PCOS or hormonal imbalances? ▸ When you want something sweet but still try to keep things somewhat low-carb and how it connects to gut health and inflammation on a low-carb or ketogenic diet? ▸ 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)? ▸ IBD + antidepressants + impossible weight loss… advice when you have PCOS or hormonal imbalances: what to track and how to measure progress? ▸ 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? 📖 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… ▸ What are the wegovy doses in order on a low-carb or ketogenic diet — what certified coaches recommend? ▸ 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? 📗 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 ▸ How long does it take to Is Autophagy? 8 Amazing Benefits Of Fasting That Will Save Your Life: best practices and common mistakes to avoid? ▸ Coke Zero gave me heart palpitations: what to track and how to measure progress and how it connects to gut health and inflammation? 📖 Metabolic Flexibility — The body’s ability to efficiently switch between burning carbohydrates and burning stored body fat based on availability… ▸ Crust check 🔥 ribeye done right — what the research actually says? ▸ 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 — what certified coaches recommend? ▸ Got diagnosed today, where do i go from here — what do certified weight loss coaches recommend: best practices and common mistakes to avoid? ▸ Probiotics worked for a month then stopped. Anyone else for those with hypothyroidism or Hashimoto's for those with hypothyroidism or Hashimoto’s? 📖 Leptin Sensitivity — Restoring your brain's ability to hear the 'I am full' signal, which is often muted by high-sugar diets and systemic inf… ▸ To what extent do Mendelian Randomization Studies provide causal evidence for a particular claim — what does the research actually say and its effect on metabolism and insulin levels? ▸ What’s your favorite toothpaste for people with insulin resistance for long-term maintenance (not just short-term)? 📗 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 ▸ How much keto-ade should I safely drink: best practices and common mistakes to avoid and how it connects to gut health and inflammation? ▸ Can you really Metformin (6 weeks in) for insulin resistance — can the gut stuff actually get better 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? ▸ If a random dance partner app existed .. would you try it: how to talk to your doctor about this and its effect on metabolism and insulin levels? 📖 Caloric Deficit Myth — The false belief that weight loss is purely 'math'; we focus on hormonal signaling rather than just counting calories to… ▸ Crust check 🔥 ribeye done right when you have PCOS or hormonal imbalances? ▸ Omnipod. Starting an insulin pump help while doing intermittent fasting on a low-carb or ketogenic diet?