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7 Stages of Fasting: Hour‑By‑Hour Action Plan

Know exactly which fasting stage to hit for your goal and stop quitting before the benefits kick in.

Based on: All 7 Stages Of Fasting Explained: Hour By Hour by Doctor Mike Diamonds

All 7 Stages Of Fasting Explained: Hour By Hour▶ Watch the source video on YouTube

Why You Need This Checklist

What if everything you thought you knew about fasting was only half the story? Most people who fast have no idea which stage their body is actually reaching — and they stop just before the real benefits kick in. You do all the hard work, endure the hunger, skip the meals, and then wonder why nothing is changing. Sound familiar?

Here is the problem nobody talks about: your fasting clock does not start when you put your fork down. It starts when your insulin finishes processing your last meal. That big dinner with pasta, bread, and dessert? Your body is still digesting three to four hours later. The twelve-hour fast you thought you completed overnight might actually be only eight hours of real fasting. You have been resetting the clock without knowing it, every single night.

Now imagine knowing exactly what your body is doing at hour four, hour twelve, hour sixteen, and beyond. Imagine understanding when fat burning actually switches on, when mental clarity kicks in, when growth hormone surges, and when your cells begin repairing themselves from the inside out. Imagine finally matching your fasting window to your actual goal — whether that is fat loss, mental sharpness, or deep cellular repair — instead of guessing.

Dr. Mike Diamonds is a medical doctor with a degree in biochemistry and microbiology, a pro natural bodybuilder, and the founder of Sculpt by Science, where he and his team of doctors work with clients every day restoring metabolic health. In his viral breakdown of the seven stages of fasting, Dr. Diamonds walks you through what is happening inside your body hour by hour — and why most people are stopping right before the good stuff starts.

This checklist distills every stage, every threshold, and every actionable insight from that video into a clean, printable PDF you can follow immediately. You will know when your first fat-burning motor comes online, what stage triggers autophagy, which window is optimal for women, and exactly when stage seven becomes territory that requires medical supervision. No guessing, no wasted fasting windows, no confusion.

Use this checklist to identify your target fasting stage, set up your eating window correctly, and start reaching the stages that actually move the needle for your health. Print it, pin it, and finally make your fasting practice work the way it was always supposed to.

What's Inside — Preview

Every checklist item comes with actionable notes to guide you — things like "Don't forget to do this before you start," "Avoid this common mistake," or "Set a reminder for 30 days out." Nothing vague, just clear next steps.

DO Stop eating 2 to 3 hours before bed to ensure your insulin clears before sleep
DECIDE Identify which fasting stage matches your personal health goal before you begin any protocol
LEARN Understand Stage 1 (Hours 0-4): recognize that you are in a fed state and no fasting is occurring
LEARN Recognize Stage 2 (Hours 4-8): digestion ends and insulin begins to fall — your fasting clock is now actually running
LEARN Understand Stage 3 (Hours 8-12): your body is drawing from glycogen reserves stored in the liver and muscles

+ 15 more action items inside...

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