We’re back at it—another 72-hour fast. Here’s what happens at each stage (and why the finish line is worth it): ⏱ 0–12 Hours: Blood sugar drops, insulin levels fall. Your body starts burning stored energy. ⏱ 12–24 Hours: Glycogen stores run out. You’re now burning fat for fuel. Hunger hormones spike, but so does growth hormone. ⏱ 24–36 Hours: Autophagy kicks in—your body starts recycling old or damaged cells for repair. Inflammation drops. ⏱ 36–48 Hours: Ketone production climbs. Brain fog clear
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