Fatigue-driven eating has biological roots willpower can’t overcome. Research by Spiegel showed just two nights of sleep restriction produced 28% higher ghrelin, 18% lower leptin, and 24% increased appetite — specifically for calorie-dense foods. Your prefrontal cortex is impaired, reward response amplified. Better food rules won’t fix this; more sleep will.
This companion explores why exhaustion drives eating, why more rules don’t work when rule-following capacity is depleted, the actual solution, and what to do on days when sleep was poor. (4 min read)
Written by AI, directed and approved by me. How this is made →