Jason Fung: Controlling the ‘Body Fat Thermostat’

Key Takeaways

• Prioritize hunger-regulating hormones (insulin, cortisol, GLP-1, testosterone, etc.) over calorie counting.
• Reduce insulin spikes by cutting refined carbs (cookies, sugary foods) in favor of low-insulin foods (broccoli, eggs).
• Manage cortisol through stress reduction to prevent fat storage signals.
• Leverage fasting to lower insulin and reset your body fat thermostat.
• Support sympathetic tone (natural metabolic boost) through movement, cold exposure, or caffeine (in moderation).

Products & Gear Mentioned

• Jason Fung’s book: The Hunger Code (covers hunger hormones in depth).
• Pharmaceutical examples (not recommended without medical supervision): Ozempic (GLP-1), Mounjaro (GIP).

Notable Quotes

“If you are overweight, it is because your thermostat is set too high, which is making the calories in calories out a problem through the mechanisms of hunger or satiety and metabolic rate, which you do not control.”

Bottom Line

Stop obsessing over calories; instead, focus on eating foods that balance hunger hormones (like protein, fiber, healthy fats) and incorporate fasting to reset your body’s fat-storage signals.

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