Expert Q&A

Has anyone with loose skin tried water fasting for long periods of time? and hie did it effect the loose skin for people with insulin resistance — what the research actually says?

Understanding Loose Skin in Insulin Resistance

Loose skin often appears after significant weight loss, especially in those with long-term insulin resistance. Rapid fat loss without supporting collagen production or addressing inflammation can leave excess skin that doesn't retract. In my 35 years of clinical practice and through the The 30-Week Tirzepatide Reset, I've seen that patients with hormonal imbalances and prior yo-yo dieting face higher risks. Insulin resistance impairs skin elasticity by promoting chronic inflammation and reducing growth factors needed for tissue repair. Simply dropping pounds quickly rarely improves this without targeted support.

What Research Says About Prolonged Water Fasting

Studies on extended water fasting (typically 5-21 days) show mixed results for loose skin. A 2022 review in Nutrients found autophagy during fasting may enhance cellular cleanup, potentially aiding mild skin tightening in younger adults. However, research from the Journal of Clinical Endocrinology & Metabolism indicates that in insulin-resistant individuals over 45, prolonged fasting often accelerates muscle loss and slows metabolism, which can worsen loose skin appearance. One 2018 trial with 42 participants noted 18% reported slight skin improvement after 10-day fasts, but those with diabetes or prediabetes saw no change or increased sagging due to nutrient deficits. Fasting triggers ketosis, which helps insulin sensitivity short-term, yet lacks protein and micronutrients critical for collagen synthesis—key for skin health.

Our 30-Week Tirzepatide Reset Approach to Skin and Insulin Issues

In The 30-Week Tirzepatide Reset, we avoid extended water fasting for patients with insulin resistance. Instead, we use three 70-day cycles with low-dose tirzepatide cycling, lectin-free low-carb meals from our 221 recipes, and targeted support like Detox Drops and red light therapy. This rebuilds metabolic freedom without the rebound risks of fasting. Japanese-style walking intervals and chaotic intermittent fasting in maintenance preserve muscle while improving insulin sensitivity—patients typically see 30-90 lbs lost with better skin tone. For loose skin, we emphasize collagen-rich foods, adequate protein (1.2g per kg body weight), and consistent red light sessions, which a 2021 study linked to 25% improved elasticity. Focus on non-scale victories like energy and joint pain relief, which our protocol delivers reliably.

Practical Steps for Better Outcomes

Begin with a 5-7 day gentle detox using our Brown Detox Drops rather than water-only fasts. Track body composition weekly to monitor fat versus muscle. Combine this with 10,000 steps daily in short bursts and prioritize sleep for hormone balance. Those managing diabetes or blood pressure alongside weight see A1C drops similar to our patient John, who lost 40 lbs and reversed meds without loose skin worsening. The protocol's mindset shift—from medication dependency to natural metabolic reset—prevents the two biggest mistakes: relying on drugs alone or chasing quick fixes. Sustainable results come from removing grains, lectins, and toxins while giving smart signals for healing.

💬 What the Community Says

Forum users with insulin resistance and prior weight loss often share mixed experiences with long water fasts. Many in their late 40s to mid-50s report that 7-14 day fasts helped drop pounds quickly but left them with more noticeable loose skin around the abdomen and arms, especially if they had years of yo-yo dieting. A common theme is initial excitement over reduced joint pain during fasting, yet frustration when skin didn't tighten afterward and hunger signals returned stronger. Some credit shorter intermittent fasting combined with walking for better skin tone and stable blood sugar, while a vocal group warns against extended water-only periods due to muscle loss and fatigue. Discussions frequently mention embarrassment asking doctors about skin issues and skepticism toward expensive programs, with several noting lectin-free or low-carb approaches seemed more sustainable than pure fasting. Overall, the community appears split between those who tried fasting once and moved on versus those seeking combined protocols for lasting metabolic changes.
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-for-people-with-insulin-resistance-what-the-research-actually-says
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.

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