How to Use the Intermittent Fasting Window & Stage Timer
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1
Choose your fasting protocol: 16:8 (Beginner), 18:6 (Intermediate), 20:4 / Warrior (Advanced), or 24h OMAD.
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2
Select your fasting start time (defaults to your last meal time today).
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Click "Start Fasting Session" to launch the live countdown timer.
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Track the biological milestone phases: Blood Sugar Stabilization (0-4h), Glycogen Depletion (4-12h), Early Ketosis & Fat Burning (12-18h), and Autophagy Cellular Cleanup (18-24h+).
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5
Timer state persists locally in your browser so you can return anytime throughout your fast.
Practical Example & Use Case
Common Real-World Scenario
Starting a 16:8 fast at 8:00 PM allows you to monitor your metabolic transition into morning fat oxidation before breaking your fast at 12:00 PM.
Technical Notes & Limitations
Browser Engine Architecture
Biological stages are scientific population estimates. Individual transition times into ketosis depend on prior carbohydrate intake and physical activity.
Frequently Asked Questions
What breaks a fast?
Any beverage or food containing caloric energy (calories from sugars, proteins, or fats) triggers an insulin response and breaks a metabolic fast. Black coffee, water, and plain tea do not.