The Obesity Code
Dr. Jason Fung
A nephrologist argues that obesity is primarily a hormonal disorder driven by insulin, not simply a matter of calories in versus calories out, reframing effective treatment accordingly.
Key takeaways
- Obesity Is a Hormonal Disorder
- Why Calories In, Calories Out Falls Short
- Refined Carbohydrates and Insulin Spikes
- Intermittent Fasting as the Primary Intervention
- Clinical Evidence From Fung's Practice
- Beginning Your Own Fasting Practice Thoughtfully
Action checklist
- Reduce refined carbohydrate and sugar intake in one meal today
- Try extending your overnight fasting window by an hour today
- Focus on insulin-lowering food choices today rather than just counting calories
Final takeaway
Consider tracking not just what you eat but when, exploring whether extending your daily fasting window affects your hunger and energy — Fung's consistent argument throughout the book, grounded in his clinical nephrology practice and hormonal framework, is that addressing chronic insulin elevation directly, primarily through strategic fasting and reduced refined carbohydrate intake, provides a more effective approach to sustainable weight management than caloric restriction alone typically achieves.
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