Boundless Life Reset Your Body's Metabolism for FASTER Weight Loss & LESS Hunger In An Era Of Ultraprocessed Foods, With Dr. Jason Fung.
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Feb 28, 2026 
Dr. Jason Fung, a nephrologist and bestselling author on fasting and metabolic disease, joins to challenge calories-only thinking. Short takes cover hormones vs calories, three types of hunger, how ultraprocessed foods hijack appetite, and the role of exercise, digestion, resistant starch and GLP-1s in shaping hunger and weight regulation.
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Calories Alone Don't Explain Obesity
- Calories eaten per day correlate weakly with national obesity rates, so calories alone don't explain obesity.
- Jason Fung compared countries with nearly identical calorie intakes (e.g., Ireland vs US) but large obesity differences to illustrate this point.
Hormones Decide If Calories Are Stored
- Different foods trigger different hormonal responses that determine whether calories are stored or burned.
- Cookies spike insulin and promote storage, while salmon raises peptide YY and GLP-1 and favors burning or satiety.
Calories In Versus Metabolic Compensation
- Energy balance is true but misleading because the body can lower energy expenditure to match reduced intake.
- If you eat 500 fewer calories the body can compensate by burning 500 fewer calories through reduced metabolic rate.
