A guide you can use to track your fasting and to help you plan before you begin to get into ketosis as fast as possible to burn fat and recycle damaged cells.
FAQ
It depends on the last meal you ate. As little as 16 hours and as long as 18 hours. This tool will track your progress hour by hour.
The moment you finish your meal, that’s when you start, after the last bite of your food.
Protein-focused. Eating lots of carbs will delay reaching ketosis.
How many steps and how much time are needed
Time needed: 18 hours
Total time needed is 18 hours or more.
- Postprandial State – Hours 0 – 3
Your gut is actively absorbing nutrients. Insulin is high, and your body is using incoming food as its fuel source. Fat storage is locked.
- Insulin Falling – Hours 3 – 6
Gut absorption is mostly complete, and insulin is dropping. However, due to biological lag time, your body hasn’t started meaningful fat burning yet.
- Post-Absorptive State – Hours 6 – 10
Blood glucose is now maintained by your liver releasing stored glycogen. Baseline fat oxidation begins, but it’s just keeping the engine idling.
- Glycogen Depletion – Hours 10 – 12
Depending on the carbs in your last meal, liver glycogen stores are nearly depleted. Lipolysis (breaking down fat) is finally ramping up.
- Ketogenesis Begins – Hours 12 – 14
Liver reroutes fatty acids into ketones. This is an evolutionary survival fuel switch. Your brain and organs begin shifting fuel sources.
- Autophagy Initiated – Hours 14 – 16
The cellular cleaning crew clocks in. Your body starts recycling damaged proteins. 16 hours gets you into the lobby, but you aren’t in the room yet.
- Moderate Fat Oxidation – Hours 16 – 17
The 16-hour trap! Glycogen is gone, but the specific fat-release enzymes are still just warming up. Do not stop now.
- The Convergence (Peak) – Hours 17 – 18
The metabolic sweet spot! Human Growth Hormone (HGH) spikes sharply, autophagy reaches max flux, and your fat release machinery shifts into top gear.
- Target Reached – Hour 18+
You’ve successfully hit the optimal 18-hour mark. Break the fast properly with protein, or proceed cautiously up to 20 hours for advanced cognitive benefits.
Why Choose Us
Most fasting apps ask for your email, location, and health history. We don’t. Our tracker is privacy-first, meaning we require no login, no account creation, and zero data tracking. Your fasting progress is stored locally in your browser, giving you full control without the surveillance of “big tech”.
All the Utility, None of the Bloat
Why download a 100MB app just to start a 16-hour clock? We provide a lightweight alternative to complex apps like Zero. Get straight to your 16:8 timer without navigating through paywalls, “plus” subscriptions, or intrusive pop-ups. It’s the essential tool for those who want to fast rather than browse.
Access Anywhere, No App Store Required
Our browser-based tracker works instantly on any device. Whether you are on your laptop at work or your tablet at home, there’s no need to visit the App Store. Save this page to your home screen for a seamless, app-like experience that loads instantly and works offline.