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The 3 Week Diet System Review: My First-Hand Experience and Results.

Hey everyone! I’m Mac. Here is my honest 3 Week Diet system review about The 3 Week Diet book by Brian Flatt. Brian Flatt’s book The 3 Week Diet system has been a huge game-changer for me. After reading his book and applying the diet plan into my weight loss journey, I’m now able to get rid of stubborn midsection fat and the most importantly– I lost a total of 12 pounds in just three weeks! In this review, I want to share my hands-on experience after using this 3 Week Diet system for my successful weight loss journey.

Use: To melt away 12 to 23 pounds of the stubborn fat body in just 3 Week.

Editorial Quality

Divided into 4 Manuals for easy reading.


You will able to lose at least 10 pounds in just 3 week.



Ease of use

Informative and simple plan to follow.


  • It works as claimed. Results can be seen after few days.
  • The manuals are separated into sections for easy reading.
  • At-home exercises are provided for busy people.
  • Money back guarantees within 60 days.


  • The diet plan is so intense and may too extreme for some people.
  • No videos are provided to show how the workouts should be done.
  • Some workouts require extra types of equipment like dumbbell and workout bench.
  • Some additional supplements are required. For me, this is optional.

Summary: The 3 Week Diet system is for me probably one of the best weight loss systems out there because it works for me. I was able to loosen my belly fat in the midsection weight as well as losing 12 pounds of overall weight in 21 days without trying too hard. However, just like any other weight loss plan, you’re expected to stay focused, motivated and abide all the guides inside the system; else you will end up hating it and feel disappointed.

Complete package for $47

I personally believe that understanding exactly why most diets fail and how to choose the right diet plan and effective workout, are the key to the successful weight loss journey. Before I found this book, I always struggle to get rid of my belly fat and losing excess weight.

The 3 Week Diet system may not the best diet out there, but it had helped me to reduce my weight in short period of time. If you’re looking to lose some weight and had been tried many diet system before but failed – this diet system is worth to try. If you’re still not in doubt about this diet, please continue reading my 3 Week Diet system review to find out more.

My Weight Loss Struggle

Ever since I started working, I had always been put on weight especially at my midsection area. I blamed it on my bad eating habits and lifestyle. I was embarrassed to take my shirt off in public whenever I went swimming or playing sports with friends.

Whenever I stare at myself in the mirror, I looked awful no matter how well I dressed. I felt like crap all the time, unhappy and lost my confidence.

I knew I really had to address the issue because I was putting myself at risk of heart attack and diabetes if the issue was not solved and that would mean not being here for my family when they need me the most. Today, I feel healthier than before…and lighter.

Now I still use this diet system to maintain my body weight while still enjoying the foods and drinks that I love. It was the best decision I could have made!

Who Should Consider The 3 Week Diet System?

As the name of this product described, this diet is an extreme diet plan- created for everyone who wants to lose weight and burn body fat fast as much as 23 pounds in just 21 days. This extreme diet can definitely help if you’re looking to change your life around and lose weight fast but be warned: you WILL have to change your diet so if this is something you are not ready to do you should look for other alternatives.

I also would like to mention this diet plan is heavily based on animal proteins and low-carb. So, if you’re vegan or vegetarian… this diet plan may not suitable for you. Unless you replace it with non-animals protein sources such as from vegetables, beans, seeds and grains – then this diet should work for you. Find out more about the vegan source of proteins here.

If you’re diabetic or with heart disease, you should consult with your doctor for diet plan advice before consider taking this kind of diet plan.

The 3 Week Diet System: Testimonial Video

The 3 Week Diet System Overview

The 3 Week Diet system is a rapid weight loss system based on medical science, rational thought and real-life proven results that help you to lose as many as 23 pounds of body fat in just 21 days. The idea of this system is transformed your body into fat-burning power and lose up a pound a day. This diet system claims that you will able to see the result fast… as much as 10 pounds in the very first week of the diet.

Why is it so extreme?

Well, according to Brian Flatt – the author of this book –the reason why most diet fails because they take too long to produce the wanted results. As the result, the dieters became demotivated and abandon the diet effort so soon. To summarize, here are some of the objectives of this diet plan:


  • To produce fast weight loss results that keep you motivated and engaged.
  • To get rid of stubborn body fat from midsection, hips, thighs and buttocks area.
  • To increase your lean body mass that will increase your metabolism.
  • To correct the bad information about weight loss that you’d heard in the past.
  • To enforce good habits of eating and regular exercise that will keep the weight off.
  • To help you to stay motivated on the weight loss journey with 3 elements – mindset, motivation, and willpower.

Who is Brian Flatt?

3 Week Diet SystemBrian Flatt is a trainer, weight loss coach and nutritionist and the author of The 3 Week Diet system. He has spent many years in the diet and fitness industry by helping his clients to lose weight.

During those years, he saw many of his clients struggling to lose weight and keeping it off. He found that those diet programs on the market are time-consuming and ineffective. So he decided to develop his own weight loss system that can produce fast results and to keep the dieter motivated.

Before releasing it to public, Brian had tested this system himself and claimed that he had lost 23 pounds in 21 days. I guess that is why he had promised so much that this system will work and the results are guaranteed.

What is Inside The 3 Week Diet System?

The 3 Week Diet is a digital product – a 96 pages PDF formatted eBook that you can instantly download into your PC, laptop, smartphone or iPad after your make the purchase from its website. The book is divided into four manuals for easy reading:


  • Introduction Manual (43 pages)
  • Diet Manual (22 pages)
  • Workout Manual (17 pages)
  • Motivation and Mindset Manual (14 pages)

(Please click the picture below to enlarge)

Introduction Manual
Diet Manual
Workout Manual
Motivation and Mindset Manual
Let’s have a brief look at each component below…

Introduction Manual

The first part of this book uncovers the general information about weight loss. It covers the following topics:

  • The reasons you get fat and the truth about weight loss information.
  • The reasons why the rapid weight loss is the solution for successful weight loss.
  • Factors affecting the efficiency of your body fat loss (metabolism, nutrients, carbohydrates, protein and so on).
  • Four Fat-Lose Rules that you should know.
  • Health benefits associated with intermittent fasting.
  • Recommended fat burning supplements to improve blood flow and fat oxidation (fat burning).
I found that this manual is very informative and easy to understand. However, if you are veteran dieter, you may find the information is not something new to you.

Diet Manual

This is the meat of 3 Week Diet system. The whole idea of this plan is to give signals to your body to burn its fat quickly by focusing on creating a calorie deficit, employing short-term fasting and engaging in a low-carbs diet. The 3 Week Diet is broken down into four phases. Each week, you will begin a new phase.

The purpose of these phases is to maximize fat loss early on while introducing more and more whole foods into your diet, eventually resulting in a nutritionally balanced and complete diet which will ensure proper health and healthy weight for the rest of your life.

Phase #1 (Days 1-7) : Detoxification

This phase is to detoxify your liver to cleanse away toxin from your body. In this period, you are allowed to eat 24 selected foods including water. You will learn to schedule your meal day by day as well as how the vegetables should be prepared.

Phase #2 (Day8): 24-Hour Fast

This is simply a 24-hour fast from dinner to dinner.

Phase #3: Fat Fast Diet (Days 9, 10, 11)

This is a period where your body will begin to release fat and utilize it as your primary fuel source. You will follow the recommended calorie allotment while striving to get at least 80% of these calories from FAT (no trans-fats).

This low-calorie, high fat diet is proven to let you shed a lot of body fat in a very short amount of time. There are sample eating plans and calories allotment list for men and women, which you can find them inside this manual.

Phase #4: Calorie Restriction Based On BMR (Day #12-21)

In this final phase, you will figure out how to calculate your unique BMR (Basal Metabolic Rate) with the simple calculation (in US measurement and in Metric form for both men and women).

Once you know what is your unique BMR is, and then you should able to create your own low-carbs diet plan (calorie deficit) depends on how much weight you’re desired to lose. 

Workout Manual

The Workout Manual is a combination of resistance training and cardio exercise that will increase your metabolism, building muscle and burn more fat in your body. The exercises focus on from simple daily walk to short, intense full-body workouts. All exercises only require you to spend about 20-30 minutes daily, and can easily be done at home or in the gym.

The resistance training and cardio exercise consist of 2 parts:

  • Full Body Fat Blasting Workout
  • Goblet Squat
  • Dumbbell Incline Bench Press
  • Bent-Over Row
  • Dumbbell Upright Row
  • Miracle Midsection Workout
  • Abs Blasters
  • Front Planks
  • Side Planks
  • Steam Engines

Motivation and Mindset Manual

This short manual uncovers the key to succeed in losing weight by motivating your and discovering the willpower to break your bad habits and build a new good one.

My Hands On Experience With The 3 Week Diet System

Now, here is the meat of this 3 Week Diet system review. Before I started following this diet plan, my initial weight was about 165 pounds. My ambition was to lose at least 10 pounds and reduce the fat around my stomach area. This extreme diet plan was hard to follow, but I just did the best that I could. The graph below represents the phases that I went through from day 1 until day 21.

(Please click the picture below to enlarge)

3 Week Diet Phases

My Diet Story

The first phase is the liver detoxification phase. My food intakes were restricted to allowed vegetables, allowed animal proteins and water. No coffee, no tea. I skipped all my breakfast and only took my first meal at noon – maximum 4 meals per day.

I only ate vegetables during first day, then the combination of vegetables, chicken, fish and eggs over the next 6 days. Each day, I spent about 15 minutes doing simple exercise like front plank and side plank. I didn’t go to the gym because I had no time to do so.

(Please click the picture below to enlarge)

Plank exercise

It was hard to adapt the changes in my meal. I feel a lack of energy because of low calories in the body. There were times I had to eat some snacks to get some energy when I was working.

By the end of the first phase, I lose about 4 pounds. Not bad, though. Next day, I went on fasting for 24 hour period – from the last dinner of day #7 until next dinner on day #8. This is to complete the detox process through autophagy. During this fast, I only drink water and coffee without sugar to reduce hunger levels. No exercise…just relax at home to preserve my energy for the whole day.

The hardest part…

Then came the hardest part where I went through to what Brian called fat fast– low-carbs, high-fat diet. I was shocked to learn that I need to eat more fats (the healthy one) in order to lose fat in my body. I always thought that diet is about eating less fatty foods – but I was wrong.

In this phase, I had to eat high-fat foods from no trans-fat foods like bacon, steaks, avocados, eggs, nuts, seeds, butter, cheese, and mayonnaise and so on.

Please do note that these foods contain healthy fat, they are good sources to burn your body fat and help the metabolism.

During these 3 days period, I had to achieve 1200-1500 calories (p/s: 1000-1200 calories for women) from those foods each day. It wasn’t easy to reach the goal without trans-fats and without carbohydrates added in.

I didn’t take the Omega-3 Fish Oil capsules supplement as suggested in the book because I just didn’t want to spend money on it. I still spent some time doing exercises just like in phase #1. When the phase #3 was over, I lost another 4 pounds.

Then came to the last stage of the diet (up to day #21) where I started eating normally compared to previous 14 days. If you’re familiar with common dieting rule “eat less, lose more”, this phase #4 is also working like that.

BMR (Basal Metabolic Rate)

What is BMR? It is called Calorie Restriction based on BMR (Basal Metabolic Rate), where you can create a calorie deficit over time by knowing how many calories you should consume daily. The rule is that – as long you eat under your restricted calorie amount, you will lose weight.

For my case, my unique BMR was 1660.15 calories. Don’t worry if you don’t know how to calculate your unique BMR, you’ll find it inside the book. I can eat anything I want as long it doesn’t pass my unique BMR number.

I was happy to lose about 12 pounds after completing this diet plan. Although not much, I knew that it works. If I want to lose my weight further, I can just eat 10-30% less of my daily BMR.

Now it becomes part of my lifestyle and I don’t need to stay in low-carb diet anymore. After few months have passed, I noticed that I never gain weight.

What Do Others Say About The 3 Week Diet?

A comprehensive weight loss program

Brian Flatt’s The 3-Week Diet book is a comprehensive weight loss program. By promoting new and good habits of eating and regular exercise, the author guarantees that a 21-day program is achievable and can be maintained. For those who yearn for the fastest way to trim down, The 3 Week Diet is for you. Its three-phased program is backed with extensive research and actual results. So you can rest assured of its safety. Two thumbs up for this book!

Nila Eslit

After the birth of my cute little son I gained a lot of extra weight. I was desperately looking for any effective way to get back in shape. A friend of mine recommended me the 3 week diet. I was no fan of these kinds of ebooks but after reading it I changed my routine. After adding the diet and exercises in my daily routine that are recommended in the 3 week diet, I start loosing my weight. Now, after 3 weeks the result is clear and I am quickly getting my shape back. Thanks to 3 week diet!

Aqsa I.

After seeing such rapid results from dieting, it encouraged me to keep going. When trying something new in life, like dieting, it’s always best to have some form of support. Us, as women, especially need some encouragement when it comes to almost anything to do with our bodies or when we change our image. But let me tell you all wonderful experiences I’ve had with The 3 Week Diet. This diet is by far the best diet I’ve ever tried. It amazes me still to this day how I lost so much weight in such a short period of time. The diet actually burns 3-4 months as much weight in 3 weeks! I would recommend this diet to anyone. The results are unbelievable!

Ashleigh G.

“Not your usual weight loss book!”
Initially felt the title of this book was quite misreading but nevertheless bought it because a friend had recommended it to me. This book isn’t like the other weight book loss programs you may have seen; it is the child of a great amount of research from the author. Its been three months now, and I have seen tremendous results using the advice and insights in this book
Stanley O.

3 Week Diet System: My Final Thought

After following this diet plan, my life has changed. I am no longer embarrassed about my weight and fat belly problem. I feel more healthy, happy and increased self-confidence than before. This program really isn’t a diet, it’s a new way of living, and I was eating way more than I had on any diet I had been on before.

If you’re struggling losing weight, you need to take action fast because of the longer excess fat in your body – the unhealthier you are and that can increase your risk of numerous diseases. I know that losing weight is NOT easy and it doesn’t happen overnight.

It takes hard work, consistency and strong willpower to success. I would recommend The 3 Week Diet system for anyone who has been struggling to lose weight for a long time without any success. I lost 12 pounds without trying too hard.

Sometimes there were few times I cheated myself, you know – eating ice-cream and snacks. But it still works for me and I know it is NOT a scam.

This diet plan comes with 60-day money back guarantee. If you are serious about losing your weight, you have no excuse not to give it a try.

You have nothing to lose but all to gain. Just click on the link below to get started. Good luck!

 Questions & Answer

Is it possible for me to lose weight up to 23 pounds in just 21 days? Sounds fishy…
The answer is yes, you can. In fact, I was able to lose up to 12 pounds in just 21 days without pushing too hard. Although losing 12 pounds is nothing to shout about but at least I already see the result. It is NOT a scam.
I am vegetarian (no meat, no seafood or eggs), does it works for me?

Yes, you can do the diet as a vegetarian. You have to replace the animal proteins with alternate proteins for vegan such as soy bean, tofu and nuts. You may find more information in the links below:

Do I have to take supplements in this diet?
Not necessary. There are few supplements recommended by Brian Flatt such as like EPA/DHA fish oil, Yohimbine with caffeine and whey protein to lose weight faster. I personally didn’t take them but I still able to lose 12 pounds of weight.
I want to buy The 3 Week Diet. If I'm going to order this, am I going to receive the books? Or download on tablet or laptop?
This is a digital product. After you make the purchase, you will receive an instant download to your iPad, PC, Kindle, or iPhone.
Does this diet prohibit drinking alcohol for the 3 week diet?
If you choose to drink alcohol, you need to know that your body will use the carbs and sugar for its immediate fuel and energy. Thus it will stop the process of fat burning of your stored fat. So you don’t do yourself any favors during this time if you consume alcohol. Try Kombucha Teas for an alcohol replacement during this 3 week period.

3 week diet review


By Brian Flatt


Sign up Below to Get your FREE Copy of The 3 Week Diet INTRODUCTION MANUAL on getting started with losing weight from 12 to 23 pounds in just 21 days!


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