Expert Q&A

Has anyone with loose skin tried water fasting for long periods of time? and hie did it effect the loose skin while doing intermittent fasting

Understanding Loose Skin During Weight Loss

As the expert behind CFP Weight Loss, I've worked with thousands of adults aged 45-54 who carry extra weight from years of hormonal shifts, diabetes management, and blood pressure concerns. Loose skin often appears after rapid or substantial fat loss because skin loses elasticity over time. Collagen production slows after age 40, and years of excess weight stretch the dermal layers. Many in our community fear that fasting will worsen sagging, but the reality depends on duration, nutrition, and supportive habits.

Water Fasting's Impact on Loose Skin

Water fasting for extended periods—typically 3 to 21 days with only water, electrolytes, and sometimes black coffee—triggers deep autophagy, the body's process of recycling damaged cells. This can improve skin texture over months by reducing inflammation that contributes to poor elasticity. However, prolonged water fasting without guidance often leads to muscle loss, which can make loose skin appear more pronounced since muscle helps fill out the skin's surface.

In my methodology outlined in The CFP Reset Protocol, I recommend water fasting only 24-72 hours max for beginners, especially those managing diabetes or joint pain. Longer fasts (7+ days) have shown in clinical observations to sometimes tighten mild loose skin through accelerated fat remodeling, but severe cases rarely resolve without additional interventions like strength training. Always supplement electrolytes to protect kidney function and blood pressure stability.

Intermittent Fasting and Skin Elasticity

Intermittent fasting (IF), such as 16:8 or 18:6 windows, offers a gentler approach that most of my clients prefer. It promotes steady fat loss without extreme calorie deprivation, allowing time for collagen-supporting nutrients during eating windows. Studies indicate IF can enhance growth hormone levels, which supports skin firmness. Pairing IF with 1.6-2.2 grams of protein per kg of ideal body weight daily, plus vitamin C-rich foods and resistance exercises 3x weekly, dramatically reduces the appearance of loose skin.

For those embarrassed by obesity-related sagging or overwhelmed by conflicting advice, start with shorter fasts. Track progress with measurements rather than the scale—many report 10-15% improvement in skin tightness after 90 days of consistent IF combined with walking to ease joint pain.

Practical Protocol for Safe Results

Begin with a 14:10 IF schedule for two weeks while focusing on whole foods: leafy greens, fatty fish, berries, and nuts to combat hormonal weight gain. Introduce a 24-hour water fast once weekly, ensuring 3-5 liters of fluid with Himalayan salt. Incorporate low-impact movements like chair yoga or water aerobics to build muscle without stressing joints. If loose skin persists after 6 months, consider non-invasive options discussed in my book. This balanced method helps middle-income families avoid costly programs insurance won't cover while delivering sustainable 1-2 pounds of fat loss weekly.

💬 What the Community Says

The community shows cautious interest in water fasting for loose skin, with many sharing stories of 5-14 day fasts leading to modest tightening around the midsection but little change on arms or thighs. Most practitioners favor intermittent fasting instead, reporting better skin tone when combined with collagen peptides and light strength training. Beginners over 45 frequently mention initial worsening of sagging due to rapid water weight loss, followed by gradual improvement after 3 months. A vocal minority warns against extended water fasts citing fatigue, hair loss, and blood sugar crashes, especially with existing diabetes or blood pressure meds. Lived experiences highlight the importance of electrolytes and medical supervision; those who failed previous diets appreciate the simplicity but stress realistic expectations—fasting alone rarely eliminates significant loose skin without building muscle underneath.
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-while-doing-intermittent
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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