The 3 Week Diet Review

The 3 Week Diet is an ultra-effective system that is often recommended for anyone looking to burn fat and lose weight quickly.

Brian Flatt, the creator claims the system is extremely fast, and produces visible results in just a week.

This will apparently help you reach a level of fat loss you never thought possible in just 21 days.

Now of course that sounds great but the purpose of the 3 week diet review is to see if it can actually give you the results they promise.

In my opinion, any program is only as good and credible as it’s creator. That’s why I’m starting this off with a background on Brian.

Who is Brian Flatt?

Brian Flatt

Brian Flatt is the creator of the The 3 Week Diet, which is a backed by science and proven results to help people melt away fat.

He started his fitness career as a professional trainer, weight loss coach and nutritionist.

While living in Southern California he built a reputation for himself and the demand for his services skyrocketed!

He eventually opened up R.E.V. Fitness, a personal training facility which he still runs today.

As a trainer and gym owner, Flatt saw firsthand how his clients struggled to lose weight and more importantly keep it off.

After seeing how frustrated his clients were while trying to lose weight he dedicated over decade doing research and two and a half more years tweaking his weight loss system.

He reviewed over 500 medical studies, dozens of diet books and hundreds of diet systems, programs, gadgets, pills and potions as he created the system.

Since launching his The 3 Week Diet, Flatt has also become a health and fitness speaker.

He goes around preaching that weight loss doesn’t have to be a slow, painful process, it’s possible to lose weight quickly and effortless if you have the right system.

“I’m a firm believer that with something that is hard to do like lose weight, enjoying quick success can provide just the encouragement that is needed for a person to commit long-term to the healthy changes they are making,” Flatt says.

Overall, it seems as though Brian Flatt has gather the right information to put a great program together.

Plus, it doesn’t hurt that he has thousands of people who support him and the 3 week diet!

The 3 Week Diet Review

The 3 week diet

The 3 Week Diet is a fitness program designed to help you lose fat in as little as 21 days.

People who have gone through the entire program and followed all the steps correctly have seem amazing results.

On average it’s about 10-20 pounds that most people claim to lose.

This program is a lot different than most because of it’s unique approach. 21 days is not a lot of time so they’ve structured the entire 3 weeks in a way to tap into the most potential.

The 3 Week Diet is comprised of 4 phases;

1. Detoxing (Day 1-7 )

Phase one will last 7 days!

You will be given a detailed list of what foods you can eat and how you should cook them.

The purpose of the first week is to detox your entire body and eliminate any toxins and waste.

2. Fast For 24 Hours (Day 8)

After a full week of detoxing your body you will then fast for a full 24 hours.

Your fast will start immediately after your last meal on day 7.

So for example if day 7 lands on Sunday and you eat your last meal at 7pm then you are not allowed to consume any calories until 7pm the next day.

Some people might struggle with that idea but it’s actually a lot easier than you think.

The reason for this fast is to give your digestive system a rest and finish cleansing any toxins still left in your body.

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3. Increase Fat Intake (Day 9-11)

Okay so you detoxed for 7 days then fasted for a full 24 hours, what’s next?

Well you can finally break you fast and start eating again. During this phase, for 3 days your diet will consist of 80% fats.

Now when I say “fats” I don’t mean burgers and fries (even though I wish that’s what I meant)

Your diet will be filled with high quality, HEALTHY fats. The reason for this is you want your body to start running off of fat instead of carbs and sugar.

Since you cleansed your body of all that and you haven’t eaten for 24 hours your body is not looking for a source of energy. That’s where that fats come.

4. Caloric Deficit (Day 12-21)

By day 12 your body should be rewired to run off of healthy fats instead of carbs.

This state is called ketosis and it is the most optimal state for you to burn fat quickly and effectively!

Phase 4 is the longest in the program, lasting 9 days. During this last stretch things will become a little more customized for your needs.

You will go into a caloric deficit depending on your personal Basal Metabolic Rate (BMR).

Your BMR is an estimate of how many calories your body burns at rest throughout the day.

The 3 Week Diet will show you how take your BMR and get into the correct caloric deficit to lose as much fat possible in the last 9 days of the program.

What Do You Get?

The 3 week diet consists of 4 different ebooks to help you succeed.

Each of them focus a different topic but are filled with tons of helpful information.

The 4 part are;

The 3 week diet review

1. Introduction Manual

The introduction manual will set the tone for the entire 3 weeks.

It explains in great detail what the diet is along with the science and research behind it.

You’ll also learn the exact steps and adjustments you need to follow to succeed with the 3 week diet.

The program also provides you with a of recommended supplements.

Now the supplements are not necessary required but they do help jump start your results and maximize your weight loss

2. Diet Manual

The diet manual is probably the most important because it outlines exactly what foods you are allowed to eat.

You’ll also learn how much protein you should eat and when you should consume it.

This manual also provides you with a list foods that help increase fat loss and which foods to stay away from.

3. Workout Manual

The Diet Manual is the key to this diet and alone, can most likely help you lose weight.

However, the workout manual is what helps you squeeze out every last bit of fat loss.

The best part about it is that you won’t need to spend 2 hours in the gym doing any crazy or intense exercises.

The workout plan is consists of 20 mins workouts, 3-4 times a week.

So even if you’re allergic to working out you can still push yourself for at least 20 mins a day.

4. Mindset and Motivation Manual

This is the section that I loved the most.

i believe this is what puts the 3 Week Diet above most fitness programs.

Most of the time losing weight is more of a mental change than it is physical.

Working out is easy but having the mindset and willpower to stick to your diet and avoid certain foods is harder.

This manual will show you how to set your goals and more importantly, STICK WITH THEM!

You’ll learn how to stay motivated and set more goals even after you complete the 3 week diet.


  • Rapid fat loss – 21 days to lose fast
  • Increase energy – health fats provide a more efficient source energy 
  • Faster metabolism – rewires your metabolism to maximize results 
  • Easy program to follow – everything is laid out for you step-by-step
  • Educational – you’ll learn the science and research behind the diet
  • Filled with value – the program provides you with tons of information to almost guarantee your success


  • Not Easy – although following the program is easy, actually doing what it says can be hard. You will need to be dedicated but the results are definitely worth it
  • Supplements are recommended – there’s nothing wrong with taking supplements but some people are against it. Also, they tend to be pricey

Final Thoughts

The 3 Week Diet review was made so you can take a look at the entire program and decide if it’s right for you.

I know I basically outlined the 4 phases of the program but those were just summaries. The information that’s actually inside all the phases are extremely helpful.

Also, the 4 ebooks included are extra bonuses to help you maximize your fat loss in just 21 days.

Now, there’s a lot of programs advertising the same kind of results. The difference with the 3 week diet is that there’s of reviews and testimonials everywhere.

Thousands of customers have posted their before and after pictures to show support of the program

At the end of the day I have to say that this program is legit! The step-by-step guidelines are fool-proof.

As long as you stay dedicated and follow everything that Brian Flatt outlines in his 3 week diet program then there’s no reason why you shouldn’t see amazing results for yourself.

Can You Really Lose 20 Pounds? $47
the 3 week diet program review

Product Name: The 3 Week Diet

  • Value
  • Price
  • User Friendliness


Art first glance this program feels very sales-y! It gives the impression of a quick sale rather than a legit program but after some research, the 3 week diet checks out! There’s tons of testimonials and reviews backing this program

Comments Rating 3 (3 reviews)


  • Easy to follow
  • Tons of testimonials
  • Based on science and research


  • A bit pricier compared to other programs
  • Recommends you also take supplements
The 3 Week Diet Review

The 3 Week Diet is an ultra-effective system that is often recommended for anyone looking to burn fat and lose weight quickly. Brian Flatt, the creator cla

Editor's Rating:


  1. Veronica August 14, 2019
  2. John August 14, 2019
  3. Marc August 14, 2019

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