Top 10 Best Books on Intermittent Fasting (2026 Reading List)

The Ultimate Reading List for Fasting Success

Intermittent fasting has revolutionized the way we approach health, longevity, and weight loss. But with so much information available online, it can be overwhelming to separate science from fad. That’s why reading the best books on intermittent fasting by medical experts is the most reliable way to optimize your journey.

In this 2026 updated reading list, we’ve ranked the top 10 most authoritative, science-backed, and practical books on intermittent fasting. Whether you are a beginner looking to start a 16:8 protocol or an advanced faster exploring autophagy, these books provide the roadmap you need.

Expert Take (Aly Owen): “I always tell my clients that fasting is 10% physical and 90% mental. Reading a well-researched book builds the mental fortitude and deep understanding required to make intermittent fasting a lifelong habit, rather than a temporary diet.”

1. The Obesity Code by Dr. Jason Fung

Considered the “Bible” of intermittent fasting, Dr. Jason Fung’s The Obesity Code completely dismantles the traditional “calories in, calories out” theory of weight loss. Dr. Fung, a nephrologist, explains how insulin resistance is the true culprit behind the obesity epidemic.

Why you should read it: If you want to understand the endocrinology of fasting—specifically how lowering insulin levels unlocks stored body fat—this is mandatory reading. It provides the medical foundation for why fasting works when traditional diets fail.

2. Fast. Feast. Repeat. by Gin Stephens

Gin Stephens brings a highly approachable, practical, and relatable perspective to intermittent fasting. Fast. Feast. Repeat. focuses on the concept of “Clean Fasting” (consuming only plain water, black coffee, or plain tea during the fast) to maximize results.

Why you should read it: It is incredibly beginner-friendly. Stephens provides actionable advice on how to tweak your fasting window (from 16:8 to OMAD) based on your unique lifestyle and how to transition into a fasting lifestyle without misery.

3. Eat Stop Eat by Brad Pilon

Brad Pilon’s Eat Stop Eat is one of the pioneering books in the modern fasting movement. Pilon advocates for a much simpler approach: taking a break from eating for 24 hours, once or twice a week, while eating normally the rest of the time.

Why you should read it: It strips away the complexity. If daily fasting windows (like 16:8) feel too restrictive for your daily schedule, Pilon’s research-backed approach to occasional 24-hour fasts offers incredible flexibility.

4. Life in the Fasting Lane by Dr. Jason Fung, Eve Mayer, and Megan Ramos

This book is a unique collaboration between a doctor, a clinical researcher, and a patient. It bridges the gap between high-level medical science and the everyday psychological struggles of trying to lose weight.

Why you should read it: It provides a deeply empathetic, step-by-step guide to navigating the social, emotional, and physical challenges of fasting. It’s perfect for those who struggle with emotional eating.

5. The Complete Guide to Fasting by Dr. Jason Fung & Jimmy Moore

While The Obesity Code focuses on the “why,” The Complete Guide to Fasting focuses heavily on the “how.” It covers everything from bone broth recipes for fasting days to specific protocols for reversing type 2 diabetes.

Why you should read it: It serves as a practical manual. If you need exact schedules, troubleshooting for side effects, and detailed plans for longer fasts (24-72 hours), this is the ultimate reference guide.

6. Intermittent Fasting Transformation by Cynthia Thurlow

Cynthia Thurlow, a nurse practitioner, tailored this book specifically for women. Fasting affects female hormones differently than male hormones, and this book addresses the unique physiological needs of women.

Why you should read it: It outlines a 45-day program designed to help women burn fat while protecting their thyroid and reproductive hormones. A must-read for women over 40.

7. Fast This Way by Dave Asprey

Dave Asprey, the “father of biohacking,” explores how fasting can be used not just for weight loss, but for ultimate cognitive performance and energy. He introduces concepts like the “Bulletproof Intermittent Fast.”

Why you should read it: If you are interested in biohacking, mental clarity, and using fasting as a tool for longevity and peak performance, Asprey’s approach is eye-opening.

8. Delay, Don’t Deny by Gin Stephens

Before Fast. Feast. Repeat., Gin Stephens wrote Delay, Don’t Deny. It champions the philosophy that you can eat whatever you want—you just have to wait for your eating window.

Why you should read it: It is brilliant for breaking the diet mentality. It teaches you how to stop demonizing food groups and find freedom through timing rather than restriction.

9. The Fasting Mimicking Diet by Dr. Valter Longo

Dr. Valter Longo, a gerontologist, developed a diet that “tricks” the body into thinking it’s fasting while you still consume specific, low-calorie plant-based foods. This is based on his extensive longevity research.

Why you should read it: Ideal for people who want the cellular benefits of extended fasting (like autophagy and stem cell regeneration) but are medically unable to do a pure water fast.

10. Intuitive Fasting by Dr. Will Cole

Dr. Will Cole blends the concepts of intermittent fasting with intuitive eating. He provides a 4-week flexible fasting plan designed to reduce inflammation and reset your metabolism.

Why you should read it: It helps you tune into your body’s natural hunger signals, ensuring that fasting feels like a natural rhythm rather than a forced deprivation diet.

Frequently Asked Questions

Do I need to read all these books to start fasting?
Not at all! We recommend starting with The Obesity Code for the science, and Fast. Feast. Repeat. for practical daily application.

Are there specific books for fasting and women’s hormones?
Yes. Intermittent Fasting Transformation by Cynthia Thurlow is specifically designed to address how fasting interacts with female hormones, estrogen, and menopause.

Can I track my progress while reading these programs?
Absolutely. The best way to implement the protocols found in these books is by using a dedicated app like our Simple Fasting Tracker to log your daily 16:8 or OMAD routines.

Aly Owen

Certified Nutritionist & Fasting Expert

Aly Owen is a certified nutritionist and intermittent fasting expert. With over 8 years of clinical experience, she specializes in metabolic health and sustainable weight loss through fasting. Aly breaks down complex science into actionable advice.