The 3 Week Diet Review – Is Brian Flatt’s Weight Loss Program For Real?

The 3 Week Diet weight loss program claims to be a science-based, foolproof diet which will help you to melt away 12 – 23 pounds of body fat in just 3 weeks – 100% guaranteed. This uncensored review will reveal, if these claims are just made up to get you buy this diet system or if it really will be possible to burn off that much stubborn body fat within 21 days.

Hey, Mike here and you’re on my uncut and unbiased 3 week diet review. You’ll discover what this diet is all about and if it might work for you.

What Is The 3 Week Diet All About?

The 3 Week Diet eBookThis diet plan has been created by Brian Flatt after a decade of personal research. Brian is a personal training, health coach, nutritionist, has a degree in biology and is the owner of REV Fitness.

This diet plan can be downloaded as ebook and it contains 96 pages. The book is broken down into the following three main components:

The Diet

The diet portion of this plan is just that – the actual diet. It consists of four phases with radically different elements.

3 Week Diet Manual Table Of Content
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Phase #1 (Days 1 – 7)

This first phase is a regimen that Brian also uses for his clients who need to lose weight “yesterday”. It works fast and you will see a great deal of weight come off during these seven days (often in the neighborhood of 5-10 pounds, or more). If you follow this plan, you are going to lose weight – a lot of weight. Period. But more importantly, this first phase is also going to cleanse your body and specifically your liver, which is very likely to not be functioning at its best.

To make the first phase as easy to follow as possible, the plan gives a list of allowed vegetables and how to best prepare them. Plus it includes a list of allowed proteins, which contains meat, fish and eggs. Water is the only allowed liquid for this first phase.

The diet plan does also give some more explanation about the different types of food you’re allowed to eat. Plus it includes a detailed plan for these 7 days on when you should eat the different types of meals.

Phase #2 (Day 8)

Phase #2 is simply a 24 hour fast day. Your last meal in Phase #1 should have been in the evening, consisting of vegetables and a protein from the allowed sources. Then you will go without eating for a 24 hour period (dinner to dinner). This is going to allow your body to complete the detox through autophagy, burning up much of the fat-burning byproducts from the rapid fat loss during phase #1. Your next meal will likely come in the evening on Day #8. For this meal, you can have whatever you want as long as carbohydrates are kept to a minimum. For those who simply cannot stand fasting, you can mimic what you did on day #7 in Phase #1.

Phase #3 (Days 9, 10, 11)

Phase 3 is a fat phase. During these three days, you will follow the recommended calorie allotment while striving to get at least 80% of these calories from FAT (no trans-fats). It is a low calorie, high fat diet which has been absolutely proven to let you shed a lot of body fat in a very short amount of time.

This sound a bit difficult to follow, but don’t worry. You’ll get a list of what kind of fat you can eat, how to prepare the meals and how many calories you should take (there’s one for women and one for men). A sample eating plan for this phase is also included.

Phase #4 (Days 12 – 21)

The final phase of The 3 Week Diet will begin to gear you toward eating somewhat “normally” compared to the 14 days that have passed. This phase involves a personalized calorie restriction to match your unique BMR and the aggressiveness of your weight loss goals.

You’ll learn how to determine your BMR. Determining your BMR is fairly simple. Brian provided calculations in U.S. measurements and in metric form. There are also separate calculations for men and women. After you got your BMR, you’ll learn how create a calorie deficit diet plan based on your BMR.

The Exercises

3 Week Diet Workout Manual
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While the diet portion of this book alone will turn your body into a fat burning furnace, Brian also added exercise routines which can nearly double your results. One of the reasons most diets fail is because the amount of exercise needed to make the diet work. But when it comes to exercise, fat loss is actually driven by intensity – not time. With this plan, the intense full-body workouts are only taking around 20 – 30 minutes a day to complete and you only do them 3 days a week.

The workouts are a combination of resistance training and cardio exercises that ignites your metabolism and forces your body to burn more fat.

The 3 week diet workouts contain 4 basic exercises which are:

  • Goblet Squat
  • Dumbbell Incline Bench Press
  • Bent-Over Row
  • Dumbbell Upright Row

To perform these workouts, you’ll need some dumbbells and optionally a bench too. That’s all you need. You can do those workouts at home and you don’t need to go to the gym if you don’t want to. Everything is explained within the manual. How to perform those exercises as well as how many reps and and sets you should do. Plus you’ll find some extra exercises for working out the abdominal muscles.

Personal tip: Don’t skip the workouts. This kind of workouts helped me to lose much more weight, than what I was able to lose just with the diet. The workouts are getting more and more important when you age.

Willpower, Motivation and Mindset

3 Week Diet Willpower, Motivation and Mindset Manual
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I found this section eye-opening, because it dispels some of the often-repeated, common myths about willpower which prevent many from succeeding. It’s not only interesting, but an important element of this diet plan. This section will help you power through your willpower challenges, and give you a host of easy-to-follow options which virtually guarantee your success on the diet.

As with any other success, weight loss success comes from the right mindset. If you can develop that, then you’ll be able to successfully lose weight and it becomes much easier than you ever though it would be.

Who Is This Diet For?

Since there aren’t any restrictions for this diet plan, everyone can profit from it, regardless of your age or body shape.

Pros & Cons of The 3 Week Diet

As with any other diet and workout plan, there are some good and some weak points associated with the program. This is also true with this diet plan. So let’s look at them.


  • The complete system is well organized into different manuals.
  • The manuals are easy to follow and you don’t need any kind of degree to understand it.
  • The diet is really easy to follow and you get everything needed to see results fast, including meal plans.
  • The included workouts are short and result oriented and they can be done at home.
  • No need for an expensive gym subscription.

What I Liked Most About Brian Flatt’s Diet Program

The one thing I really liked about the 3 week diet system was, that it not only gives you some meal plans to follow, but also does teach you how to get the right mindset fora healthy lifestyle, which does make sure, that you not only lose the weight you want but that you also will be able to keep it off for the long run.

60 Day Money Back Guarantee

There’s also a 60 day money back guarantee included within the 3 Week Diet plan. So after you purchased it, you can instantly download the ebook, which includes all the different manuals. Shouldn’t you get the desired results, Brian Flatt will refund you the money. This makes is even easier to get started with it.


  • The workouts are only described with some images, but there are no videos included. It would have been nice to get some instruction videos for the workouts. You still could go to YouTube and you’ll find videos for those exercises.


Weight loss is something many people struggle with. That won’t change automatically, doesn’t matter what kind of diet plan they follow. If you really want to lose weight and get in shape, then you need to put in some efforts from your side to see the results you’re looking for. Dropping off pounds won’t happen over night either. However, with the 3 Week Diet plan and the 60 day money back guarantee, there really is no excuse to not give it a try. If it doesn’t work for you, you get your money back, but if it does work for you, you and also your body will be thankful you tried it.

Overall, the 3 Week Diet plan is one which I can recommend to my family and friends and so I can also recommend it for you.

I hope you enjoyed my review. If so and you think your friends would also enjoy it, then please consider sharing it. Thank You.

Get Started With The 3 Week Diet

Questions & Answers

Can I follow the diet as a vegetarian and / or vegan?

Short answer: Yes, you can follow the diet too. However the one thing you might need to do is replacing the animal protein sources with some alternative ones. If you need some ideas on alternative protein sources, then check out the links below. They have some helpful info and resources for non-animal proteins.,,20718479,00.htm

Do you need to take / get supplements?

Short answer: No, you don’t need supplements. There are some supplements recommended by Brian Flatt which will help you to lose weight faster, but you don’t need them at all. You can follow the 3 week diet plan without any supplement and still lose the same amount of weight as you would with the supplements. It might take a bit more time if you don’t take any supplements, but you still can reach your weight loss goals for sure.

Do you have any questions?

If you have any questions regarding the diet or workouts, then please let me know them by leaving a comment below. I’ll try to answer them as fast and as good as I can.