Life Podcasts

Why Am I Always Hungy? | Jason Fung MD

In this episode, Dr. Jason Fung, a nephrologist and author of *The Obesity Code* and the upcoming *The Hunger Code*, explains why the simplistic "calories in vs. calories out" model fails to address weight gain. He introduces the body‑fat thermostat concept, showing how hormones like insulin, leptin, ghrelin, GLP‑1 and GIP regulate fat storage and drive three types of hunger: homeostatic, hedonic, and conditioned. Fung argues that high insulin—often driven by diet, medication, or stress—lowers metabolic rate and fuels overeating, while fasting can reset insulin and unlock metabolic benefits such as autophagy. Ultimately, understanding the hormonal and behavioral roots of hunger offers a more effective playbook for weight loss than willpower alone.