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The Ultimate Guide to Prolonged Fasting: How-tos, FAQs, Safety, Expectations, and Scientific Insights from a 20+ Year Practitioner
At some point, most of us have stood on a scale and asked, “Why isn’t this working?” We’ve counted calories, cut carbs, tracked macros, bought meal plans, and followed every rule we were told would lead to results–only to regain the weight or end up more frustrated than when we started. Deep down, it becomes impossible to ignore the traditional diet methods don’t just fall short–they’re fundamentally broken. It’s been over 50 years since the obesity epidemic began, and not once has mainstream diet advice produced a single year of measurable decline in obesity or related chronic disease.
If the obesity epidemic and chronic illness are the results of living in endless feast while being biologically built for both feast and famine, isn’t it time we accept that going without food isn’t extreme–it’s essential? For millennia, our survival depended on cycles of plenty and scarcity. These rhythms weren’t just endured; they shaped us. They gave our bodies time to repair, reset, and thrive. But modern life, with its constant access to food and fear of hunger, has severed that natural rhythm. Isn't it time we restore it?
Fasting is one of the oldest, most time-tested healing practices known to humanity–and modern science now confirms what ancient wisdom always knew. Prolonged fasting improves weight loss, reverses insulin resistance, reduces inflammation, and activates autophagy. It is one of the most clinically supported strategies available today.
Written by a long-time practitioner with over 20 years of experience, The Ultimate Guide to Prolonged Fasting is the most structured, comprehensive, and accessible guide for anyone ready to master the art and science of not eating. Whether you’re aiming to lose weight, improve your metabolic health, reverse insulin resistance, tap into autophagy, or simply challenge yourself mentally, this book covers it all–from the basics to the biochemistry.
Built for all experience levels, the book is easy to navigate and layered by scientific complexity. You’ll find TL;DR summaries for quick answers, plain-language fundamentals for newcomers, and in-depth breakdowns of biochemical pathways for advanced readers. It’s structured so you can skip what you already know and go straight to what you don’t.
You’ll learn the difference between fasting and starvation, explore various approaches (water fasting, dirty fasting, rolling fasts), and compare fasting to keto, calorie restriction, intermittent fasting, and even drugs like semaglutide. You'll get detailed guidance on mindset, preparation, execution, and refeeding–along with the psychological tools to stay committed and social while not eating.
Throughout the chapters, you’ll find insights from the half a million members of r/fasting, summarizing the collective wisdom, challenges, and solutions from real-world fasters. Relevant Reddit threads are linked for those who want to dig deeper into community conversations and opinions that reflect actual experience–not just theory.
The FAQ section is built around the real questions people What breaks a fast? Will I lose muscle? Will fasting damage my metabolism? What kind of exercise works best? How do I handle social events? These aren’t academic hypotheticals–they’re real challenges faced by real people in the middle of a fast, needing real answers. And those answers come from someone who is both an expert and a practitioner.
Whether you’re preparing for your first 24-hour fast or planning a 5- or 7-day extended fast, this book adapts to your goals and your pace.
If the obesity epidemic and chronic illness are the results of living in endless feast while being biologically built for both feast and famine, isn’t it time we accept that going without food isn’t extreme–it’s essential? For millennia, our survival depended on cycles of plenty and scarcity. These rhythms weren’t just endured; they shaped us. They gave our bodies time to repair, reset, and thrive. But modern life, with its constant access to food and fear of hunger, has severed that natural rhythm. Isn't it time we restore it?
Fasting is one of the oldest, most time-tested healing practices known to humanity–and modern science now confirms what ancient wisdom always knew. Prolonged fasting improves weight loss, reverses insulin resistance, reduces inflammation, and activates autophagy. It is one of the most clinically supported strategies available today.
Written by a long-time practitioner with over 20 years of experience, The Ultimate Guide to Prolonged Fasting is the most structured, comprehensive, and accessible guide for anyone ready to master the art and science of not eating. Whether you’re aiming to lose weight, improve your metabolic health, reverse insulin resistance, tap into autophagy, or simply challenge yourself mentally, this book covers it all–from the basics to the biochemistry.
Built for all experience levels, the book is easy to navigate and layered by scientific complexity. You’ll find TL;DR summaries for quick answers, plain-language fundamentals for newcomers, and in-depth breakdowns of biochemical pathways for advanced readers. It’s structured so you can skip what you already know and go straight to what you don’t.
You’ll learn the difference between fasting and starvation, explore various approaches (water fasting, dirty fasting, rolling fasts), and compare fasting to keto, calorie restriction, intermittent fasting, and even drugs like semaglutide. You'll get detailed guidance on mindset, preparation, execution, and refeeding–along with the psychological tools to stay committed and social while not eating.
Throughout the chapters, you’ll find insights from the half a million members of r/fasting, summarizing the collective wisdom, challenges, and solutions from real-world fasters. Relevant Reddit threads are linked for those who want to dig deeper into community conversations and opinions that reflect actual experience–not just theory.
The FAQ section is built around the real questions people What breaks a fast? Will I lose muscle? Will fasting damage my metabolism? What kind of exercise works best? How do I handle social events? These aren’t academic hypotheticals–they’re real challenges faced by real people in the middle of a fast, needing real answers. And those answers come from someone who is both an expert and a practitioner.
Whether you’re preparing for your first 24-hour fast or planning a 5- or 7-day extended fast, this book adapts to your goals and your pace.
1005 pages, Kindle Edition
Published September 7, 2025
1 person want to read
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