The Hunger Code

As soon as you go off the diet or stop taking the medication, old habits return, the weight comes back, and the calorie-counting journey starts all over again. 

Traditional medicine continues to treat the symptom of weight gain rather than addressing its root causes, intervening with quick fixes and short-term solutions while ignoring the factors that lead to sustainable, lasting change.

But what if the secret to long-term weight maintenance isn’t just about what you eat, or even when you eat, but why you eat?

Building on the groundbreaking work of his bestseller The Obesity Code, Dr. Jason Fung returns with The Hunger Code, a follow-up that goes deeper into the forces driving weight gain and why so many attempts at lasting change fall short. 

With the food industry’s reliance on ultra-processed foods and the growing popularity of medications like Ozempic and Mounjaro, understanding the forces behind why you eat is more important than ever. Dr. Fung reveals the three powerful forces that drive you to eat:

• Physical hunger
• Emotional hunger
• Social hunger

Dr. Fung also introduces the concept of the body’s “fat thermostat,” a biological set point that regulates how much fat your body tries to maintain. Guided by hormones and metabolism, this internal system drives hunger and energy use, explaining why lasting weight loss requires more than just willpower.

With three Golden Rules and 50 actionable tips, The Hunger Code empowers you to recognize and respond to hunger appropriately. You’ll learn how to slow digestion, break emotional eating cycles, and overcome social pressures, so you can maintain a healthy weight whether you’re starting from scratch, coming off a fast, or transitioning away from weight-loss drugs.