4:3 Diet - The Best Diet?

The 4:3 Diet: A flexible intermittent fasting system for sustainable weight loss — without daily dieting

Hi, I’m Tony Berg.

If you’re reading this, there’s a good chance you’ve tried to lose weight before.

Maybe you’ve counted calories, tried different diets, or followed meal plans that seemed promising at first but became difficult to maintain over time.

I know how frustrating that can be.

I’ve been there myself.

Over the years, I’ve tried countless ways to lose weight.

Some worked for a while.

Others were simply too difficult to maintain.

But most of them had one thing in common.

They expected me to be on a diet every single day.

Every day required commitment.

Every day required discipline.

Every day felt like another day of dieting.

For me, that became the biggest challenge.

It wasn’t that the diets didn’t work.

It was that they demanded something from me every single day, making them difficult to stick with over the long term.

Then I discovered the 4:3 Diet.

What immediately appealed to me wasn’t the promise of a quick fix.

It was the simplicity of the approach.

Instead of asking you to stay in “diet mode” seven days a week, it asks for your commitment on just three.

On those three days, you reduce your calorie intake.

On the other four days, you simply eat normally.

That means the majority of your week doesn’t feel like you’re on a diet at all.

After discovering the 4:3 Diet, I spent a great deal of time researching how it worked before deciding to give it a try myself.

Over the following months, I lost weight and, perhaps even more importantly, I managed to keep it off. For the first time, I felt like I’d found an approach that didn’t just help me lose weight—it was one I could genuinely imagine following for years to come.

That experience, together with everything I’d learned through my research, inspired me to write the guide I wish I’d had when I first discovered the 4:3 Diet.

Although there was plenty of information available online, it was often scattered across research papers, websites, articles and videos. I wanted to bring everything together into one practical, easy-to-follow guide that explains not just what the 4:3 Diet is, but how to successfully make it part of everyday life.

I hope this guide helps you as much as discovering the 4:3 Diet helped me.

Get the 4:3 Diet Guide

What Is the 4:3 Diet?

The 4:3 Diet is a flexible form of intermittent fasting.

Each week, you choose three days where you reduce your calorie intake, while eating normally on the remaining days.

The days don’t need to be consecutive, and they don’t have to stay the same every week. You can easily adjust them around work, family life, holidays or social occasions.

The concept evolved from the well-known 5:2 Diet, increasing the number of lower-calorie days from two to three to create a larger weekly calorie deficit while maintaining the same flexible philosophy.

If you’ve tried the 5:2 Diet before and enjoyed its simplicity but didn’t achieve the results you were hoping for, the 4:3 Diet may offer a practical alternative by increasing the weekly calorie deficit without fundamentally changing the approach.

Why So Many People Find the 4:3 Diet Easier to Stick To

Many diets can help people lose weight.

The real challenge is sticking with them over the long term.

What I like most about the 4:3 Diet isn’t that it’s a shortcut or a miracle solution.

It’s that it feels realistic.

Rather than trying to be perfect every day, you follow a simple weekly structure that’s easier to maintain month after month.

For me, that’s what makes the biggest difference.

Why I Wrote This Guide

When I first discovered the 4:3 Diet, I found myself reading countless articles, research papers and online discussions to understand how it worked.

Some sources explained the science.

Others shared personal experiences.

But very few brought everything together into one clear, practical and easy-to-follow guide.

That’s exactly what I wanted this book to be.

Whether you’re completely new to intermittent fasting or you’ve already tried other diets, my goal is to give you the knowledge and confidence to get started with the 4:3 Diet in a way that feels realistic and sustainable.

What's Inside

A comprehensive guide of over 50,000 words covering every aspect of the 4:3 Diet.
The science behind the 4:3 Diet and how it works.
How intermittent fasting supports healthy, sustainable weight loss.
A simple step-by-step guide to getting started.
Recommended calorie targets for your lower-calorie days.
Practical meal ideas, food suggestions, and planning tips.
Tips to make lower-calorie days easier and more manageable.
The most common mistakes—and how to avoid them.
Strategies for staying motivated, consistent, and on track.
Answers to the most frequently asked questions.

Is the 4:3 Diet Right for You?

If you’re looking for a flexible approach to weight loss that fits around real life instead of taking it over, the 4:3 Diet may be exactly what you’ve been looking for.

Whether you’re new to intermittent fasting or simply searching for a more sustainable routine, this guide will help you understand how to make the 4:3 Diet work for you.