The fat thermostat (homeostasis)

This episode is brought to you by Cozy Earth, LMNT, Maui Nui, and One Skin.

When we think about weight loss, it’s usually framed as a matter of willpower. Eat less. Move more. Try harder. But this episode explores an alternative perspective. Dr. Jason Fung argues that obesity isn’t simply about calories, but about hunger, hormones, and what he describes as a biological “fat thermostat” that may be working against you.

Today on The Dhru Purohit Show, Dhru sits down with Dr. Jason Fung to unpack his framework for understanding weight gain and fat loss. Dr. Fung explains why he believes calorie restriction often fails, the three types of hunger he describes, and how what he calls “over-hunger” may drive weight gain more than overeating alone. He also breaks down his concept of the “fat thermostat,” metabolic compensation, and what he believes we can learn from other cultures about food environments. He shares his views on GLP-1 drugs, protein needs, and the three “golden rules” he recommends for resetting hunger naturally.

Dr. Jason Fung is a Nephrologist, researcher, and bestselling author known for reshaping the conversation around obesity, diabetes, and fasting. His books, The Obesity Code, The Diabetes Code, and The Complete Guide to Fasting, have sold over 1 million copies worldwide and have challenged conventional treatment approaches for type 2 diabetes. He is also the author of The Cancer Code and cofounder of The Fasting Method, a program that helps people lose weight and reverse type 2 diabetes through evidence-based fasting. His work has been featured in CNN, Time, The Atlantic, and Forbes.

In this episode, Dhru and Dr. Fung dive into:

(00:37) The Real Problem Isn’t Overeating. It’s Over-Hunger

(5:26) The 3 Types of Hunger (And Which One Is Controlling You)

(13:08) Are Some Calories Actually More Fattening Than Others?

(17:07) The “Fat Thermostat” That’s Secretly Defending Your Weight

(33:51) How Ultra-Processed Foods Hijack Your Hormones

(41:46) The “Healthy” Ultra-Processed Foods Hiding in Plain Sight

(45:10) What Other Countries Get Right About Food (That We Don’t)

(52:00) Who Told Us We Needed to Snack Every 3 Hours?

(55:50) Are You Eating Enough Protein? 

(1:03:23) GLP-1s: Breakthrough Tool or Temporary Fix?

(1:12:34) The 3 Golden Rules That Actually Reset Hunger

(1:19:45) Can You Overeat “Healthy” Food? 

(1:21:45) Why Mindless Eating Is More Powerful Than You Think

(1:29:35) The Hidden Habits That Keep You Hungry

(1:37:12) Health Markers That Reveal Your Metabolism Is Struggling

(1:45:10) Where to Go Deeper with Dr. Jason Fung

Also mentioned in this episode:

• The Hunger Code: Resetting Your Body's Fat Thermostat in the Age of Ultra-Processed Food

• Dr. Jason Fung Masterclass 

• The Biggest Ozempic Mistakes: What to Do After GLP-1 Drugs to Keep the Weight Off for Good with Dr. Holly Wyatt and Dr. James Hill

For more on Dr. Fung, follow him on Facebook, X/Twitter, Instagram, YouTube, or visit his Website.

This episode is brought to you by Cozy Earth, LMNT, Maui Nui, and One Skin.

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