Autophagy Fasting Timeline (16, 24, 36 & 72 Hours): What Happens in Your Body

I broke down what I noticed—and what research suggests—at each fasting stage: 12–16 hours (metabolic switch), 16–18 (autophagy may ramp up), 24+ (deeper ketosis), 36 & 72 hours (stronger repair signals). Plus beginner tips, hydration, and how to break a fast.