The Obesity Code

"Obesity is a hormonal, not a caloric imbalance." Calorie myth debunked. The conventional wisdom that obesity is simply a matter of calories in versus calories out is fundamentally flawed. This oversimplification ignores the complex hormonal processes that regulate body weight. The body doesn't treat all calories equally - 100 calories of sugar have a vastly different hormonal effect than 100 calories of olive oil. Homeostasis at work. The body actively regulates its weight through various hormonal mechanisms, much like how it regulates body temperature or blood pressure. When we try to lose w

Lesson 1: Obesity is a hormonal imbalance, not a caloric one

This principle from The Obesity Code is backed by Jason Fung's extensive research and real-world examples. Understanding it deeply can shift how you approach decisions, relationships, and long-term planning in meaningful ways.

Lesson 2: Insulin is the key hormone driving weight gain

This principle from The Obesity Code is backed by Jason Fung's extensive research and real-world examples. Understanding it deeply can shift how you approach decisions, relationships, and long-term planning in meaningful ways.

Lesson 3: Carbohydrates, especially refined sugars, spike insulin levels

This principle from The Obesity Code is backed by Jason Fung's extensive research and real-world examples. Understanding it deeply can shift how you approach decisions, relationships, and long-term planning in meaningful ways.

How to Apply The Obesity Code's Lessons

The real value of The Obesity Code lies in its applicability. After reading, the most important step is identifying which of Jason Fung's principles speak most directly to your current situation.

Consider keeping a journal while reading — noting where the ideas challenge your current approach and where they confirm what you already suspected. The friction of your own resistance often points to the most important insights.

Key Quote

"Obesity is a hormonal imbalance, not a caloric one" — Jason Fung, The Obesity Code

About the Author

Jason Fung is the author of The Obesity Code. The book reflects years of research, observation, and synthesis of evidence from multiple disciplines.