Expert Q&A

Has anyone with loose skin tried water fasting for long periods of time? and hie did it effect the loose skin: best practices and common mistakes to avoid

How Water Fasting Affects Loose Skin

I've guided thousands through sustainable approaches detailed in my book The CFP Reset. Water fasting, which involves consuming only water for extended periods, can accelerate fat loss but has nuanced effects on loose skin. During prolonged fasts of 5-21 days, the body enters deep ketosis, rapidly mobilizing visceral and subcutaneous fat. This can initially make loose skin appear more pronounced because the underlying fat padding diminishes quickly, leaving excess skin without structural support.

However, many in their 40s and 50s report that moderate water fasting (3-7 days) followed by nutrient refeeding improves skin tone over time. Autophagy—the cellular cleanup process that peaks around day 3—helps break down damaged proteins in the dermis, potentially boosting collagen remodeling. In my experience with clients managing diabetes and blood pressure, this process aids hormonal balance, reducing cortisol-driven skin laxity. Yet, fasting longer than 10 days without medical supervision often leads to muscle loss, which worsens the sagging appearance since muscle provides the framework beneath the skin.

Best Practices for Water Fasting with Loose Skin Concerns

Start conservatively if you're a complete beginner. Begin with 24-48 hour fasts to test tolerance, especially with joint pain that makes movement difficult. Hydrate with 3-4 liters of water daily, adding electrolytes like sodium (2-3g), potassium (1g), and magnesium (300-400mg) to prevent imbalances that stress skin tissues. In The CFP Reset, I emphasize breaking fasts with collagen-rich bone broth and vitamin C sources to support elasticity.

Combine fasting with gentle resistance movements like seated bands or pool walking 2-3 times weekly—these build muscle without straining joints. Track progress with measurements rather than scale weight; aim for 1-2 pounds of fat loss per fasting cycle. For those with hormonal changes, time fasts during the follicular phase when estrogen supports skin repair. Always consult your physician first, particularly if managing blood pressure or diabetes medications.

Common Mistakes to Avoid

One frequent error is jumping into multi-week water fasts without prior metabolic flexibility, leading to rapid yo-yo effects that stretch skin further. Another is neglecting protein refeeds—post-fast meals must include 20-30g of high-quality protein to stimulate muscle protein synthesis and prevent sarcopenia. Skipping electrolytes causes dehydration that dulls skin and exacerbates sagging.

Avoid dry fasting or combining with intense exercise; both increase oxidative stress on aging skin. Many overlook the refeeding window: overeating processed carbs after a fast spikes insulin and inflammation, hindering collagen production. Finally, don't ignore emotional aspects—embarrassment around obesity can lead to isolation during fasts; community support improves adherence and results.

Long-Term Strategy for Skin Improvement

Water fasting works best as part of a cyclical plan rather than a one-off. Alternate 3-5 day fasts with my CFP nutrient-dense refeed protocols rich in omega-3s, antioxidants, and minerals. Over 6-12 months, this approach has helped clients reduce loose skin visibility by 30-50% through consistent fat loss and tissue remodeling, all without expensive interventions insurance won't cover. Focus on sleep (7-9 hours), stress management, and topical hydration to amplify benefits.

💬 What the Community Says

The community shows cautious interest in water fasting for loose skin after major weight loss, with many in the 45-55 age group sharing mixed results from 3-10 day fasts. Most practitioners report that shorter fasts made loose skin look temporarily worse due to quick fat loss, but skin appeared firmer after consistent cycles paired with strength training and collagen intake. A vocal minority warns of muscle wasting and worsened sagging from extended 14+ day fasts without electrolytes or medical oversight, especially among those with joint pain or hormonal issues. Beginners frequently debate refeeding mistakes, noting that rushing back to heavy meals caused bloating and inflammation that highlighted skin laxity. Overall sentiment leans toward using fasting sparingly within structured programs rather than as a standalone solution, with users appreciating real-life stories over theoretical advice. Many express frustration with conflicting online guidance and value practical tips that fit busy schedules and middle-income realities.
Cite this answer
Clark, R. (2026). Has anyone with loose skin tried water fasting for long periods of time? and hie. *CFP Weight Loss*. https://ask.cfpweightloss.com/ask/has-anyone-with-loose-skin-tried-water-fasting-for-long-periods-of-time-and-hie-did-it-effect-the-loose-skin-best-practices-and-common-mistakes-to-avoid
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
▸ Do you think they read the responses they receive: how to talk to your doctor about this while doing intermittent fasting? ▸ How does chasing skinny ever get old for long-term results while doing intermittent fasting? ▸ Tips for maintenance: what’s yours for long-term maintenance (not just short-term): best practices and common mistakes to avoid? 📖 One Box Protocol — A revolutionary approach where we stretch one 60 mg box of tirzepatide across three metabolic phases, prioritizing long-… ▸ Is compounded semaglutide with B12 worth choosing over B6 or plain: best practices and common mistakes to avoid — what certified coaches recommend? ▸ 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? ▸ 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? ▸ 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? 📖 GLP-1 Receptor Agonist — A class of medication that mimics natural hormones to improve insulin secretion and slow gastric emptying, used strategi… ▸ Is it okay for teenagers to do longterm lowcarb/keto — evidence-based answer for CFP patients for those with hypothyroidism or Hashimoto’s? ▸ 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? ▸ How are people using 10mg reta vials at low doses during the weight loss plateau phase — what the research actually says? 📖 Hashimoto’s Success — Achieving weight loss and reduced inflammation in thyroid patients by removing dietary triggers like lectins and modern … 📗 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 does a 16 hour daily fast induce autophagy for men for long-term maintenance (not just short-term)? ▸ What foods to stock for overnight guest — evidence-based answer for CFP patients: what to track and how to measure progress? ▸ 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? ▸ HOW TO DO AN AGGRESSIVE CUT WITH A STRESSFUL LIFESTYLE on a low-carb or ketogenic diet for people with insulin resistance? ▸ 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? ▸ 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? ▸ 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? 📖 Modern Wheat Dangers — The hidden threat in hybridized grains that causes gut inflammation and spikes blood sugar more aggressively than pure t… ▸ 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. 📗 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 ▸ 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? ▸ Does okra water actually help gut issues: what to track and how to measure progress — what certified coaches recommend? 📖 Insulin Resistance — A condition where your cells stop responding to insulin, locking fat in storage; our protocol is designed to unlock thes… ▸ 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? ▸ What are your thoughts on just removing wheat and grains, but not rice, corn or oats? Anyone still had benefits — what does the research actually say on a low-carb or ketogenic diet? ▸ What actually helps with the dryness when you have PCOS or hormonal imbalances while doing intermittent fasting? ▸ Have you seen this? Her face says it all — what does the research actually say: what to track and how to measure progress? ▸ 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? ▸ Testosterone how long does it take to work while doing intermittent fasting if you're on a GLP-1 like semaglutide or tirzepatide? 📖 Metabolic Reset — The process of retraining your body to utilize stored fat for fuel and regulating hunger hormones so you can maintain yo… ▸ Anyone remember the metal lid you had to use a butter knife to pop off: what to track and how to measure progress 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 ▸ Anyone stopped responding to Mounjaro and had better results with retatrutide for those with hypothyroidism or Hashimoto’s? ▸ Should I be worried yet, been sitting for 5 days no movement while doing intermittent fasting: best practices and common mistakes to avoid? ▸ Sugar free 2020, who's with me — what most people get wrong about this: what to track and how to measure progress? 📖 Tirzepatide Micro-Dosing — The practice of using the lowest effective dose to achieve results, minimizing side effects while maximizing the longevi… ▸ Are people who get no effect just using bad product for people with insulin resistance when you have PCOS or hormonal imbalances? ▸ 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? ▸ 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? ▸ 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 for people with insulin resistance? ▸ Is lime water (but sipped throughout the day) ok with autophagy — how a functional medicine approach differs for people with insulin resistance? ▸ Free carb counter apps on a low-carb or ketogenic diet: 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 ▸ What’s your favorite toothpaste for people with insulin resistance — what the research actually says? 📖 High-Dose Dependency — The pharmaceutical trap of staying on maximum medication doses indefinitely, which we avoid through our smart cycling me… ▸ How to handle calories vs carbs/fat/sugar and how it connects to gut health and inflammation on a low-carb or ketogenic diet? ▸ Omnipod. Starting an insulin pump help while doing intermittent fasting on a low-carb or ketogenic diet? ▸ 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? ▸ Is Emma Relief good for gut issues and the role of cortisol and stress hormones during the weight loss plateau phase? ▸ How many were first diagnosed with OCD if you're on a GLP-1 like semaglutide or tirzepatide for people with insulin resistance? ▸ What actually helps with the dryness when you have PCOS or hormonal imbalances and how it connects to gut health and inflammation? 📖 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 compounded semaglutide with B12 worth choosing over B6 or plain: best practices and common mistakes to avoid 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 ▸ Difference between a 3 day and 5 day water fast for autophagy and the role of cortisol and stress hormones for people with insulin resistance? ▸ Crust check 🔥 ribeye done right for long-term maintenance (not just short-term)? ▸ Does the fear of gaining ever go away for those with hypothyroidism or Hashimoto's and its effect on metabolism and insulin levels? ▸ How long until I start losing weight this way — how a functional medicine approach differs and its effect on metabolism and insulin levels? ▸ 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? 📖 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 … ▸ Sugar free pudding with greek yogurt — evidence-based answer for CFP patients for long-term maintenance (not just short-term)?