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.
Cite this answer
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.

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