The CPB Diet

What if losing weight had nothing to do with willpower?
Most diets fail before they begin. Not because you are not trying hard enough — but because they are built on restriction, complexity, and hunger that no normal person can sustain.
The CPB Diet is different.
Inspired by the groundbreaking experiment conducted by kinesiologist and Built With Science founder Jeremy Ethier, this book takes one of the most talked-about fat loss protocols of 2026 and walks you through it — clearly, honestly, and completely — from day one to day thirty and beyond.
The premise is simple. Four foods. Thirty days. Zero calorie counting.
Chicken breast. Potatoes. Broccoli. Carrots. Eat as much as you want. Watch what happens.
But this is not a recipe book. Inside, author Tom Fletcher explains the real science — why food variety quietly drives overeating, how your brain's reward system keeps you eating past fullness, and why reducing that noise for thirty days resets your appetite in ways no conventional diet can replicate.
Inside this book you will discover:

The neuroscience of why you overeat — and the precise mechanism that makes CPB shut it down
The difference between CPB Strict and CPB Flex — and exactly which version fits your life
A week-by-week roadmap of what to expect, including the hard days nobody talks about
How to meal prep the entire week in thirty minutes
How to handle restaurants, travel, family dinners, and social situations without falling off
Why water, sleep, and stress quietly make or break your results
What to do when the scale stops moving — and what it is actually telling you
How to keep the weight off permanently once the thirty days are done

This is not about eating perfectly. It is about eating simply — and understanding exactly why simple works when everything complicated has not.
Full credit for the original CPB protocol belongs to Jeremy Ethier and the Built With Science team. This book is an independent educational guide that expands on his research for readers who want the full picture.
If you have tried everything and are quietly wondering whether something is broken — nothing is broken. You just need a different tool.
This is that tool.

Scroll up and grab your copy today.