The Hunger Code

The Hunger Code by Dr Jason Fung

Understand why you feel hungry, why willpower is not the full story, and how modern food can make lasting change feel harder than it should.

The Hunger Code is a practical, science-led guide from Dr Jason Fung, bestselling author of The Obesity Code. It explores the hormones, habits and food environment that influence hunger, cravings and weight regain.

Why this book is worth reading

• Explains why hunger is not just a discipline problem
• Breaks down the impact of ultra-processed foods on appetite
• Introduces the body's “fat thermostat” in simple terms
• Includes 45 practical tips for everyday eating habits
• Helpful for readers interested in keto, fasting and metabolic health

A smarter way to understand hunger

Many people blame themselves when weight loss does not last. Dr Fung takes a different approach. He explains how appetite, hormones, digestion, emotional eating and social pressure can all shape the way people eat.

Instead of relying on calorie counting alone, The Hunger Code helps readers understand what may be driving hunger in the first place.

Inside the book

• The role of hormones in hunger and appetite
• Why ultra-processed foods can make overeating easier
• How digestion speed may affect fullness
• Strategies for emotional eating and cravings
• Practical tools for building more sustainable habits

Who it is for

This book is ideal for anyone interested in low-carb living, keto, fasting, appetite control or metabolic health. It is also a strong choice for readers who enjoyed The Obesity Code and want a deeper understanding of hunger.

About the author

Dr Jason Fung is a bestselling author known for making complex metabolic health topics clear and practical. His work focuses on insulin, fasting, obesity, type 2 diabetes and long-term health habits.

What experts are saying

“Dr Jason Fung cuts through diet dogma with clear science and calm conviction.”
Benjamin Bikman, PhD

“This book explains why we can be overfed, yet constantly hungry.”
Robb Wolf

“Filled with fascinating facts about food, hunger hormones, and eating habits.”
Dr Georgia Ede

Add The Hunger Code to your keto bookshelf and get a clearer understanding of why hunger happens.