3 Week Diet Review

Editor Rating:

2 stars


NOTE: This review is an assessment of the product called “3 Week Diet,” which is authored by Brian Flatt. It should not be confused with the product created by Josh Bezoni and Joel Marion which carries the exact same name.


  • This weight loss program would entice you if you want to lose weight quickly, like “12 to 23 pounds in 3 weeks” quick. However, being able to deliver that promise is a whole different story.
  • Has separate sections for each of the weight loss trifecta component – dieting, exercising, and motivation.
  • The presentation is clean and the design is aesthetically pleasing.
  • That’s about it.


  • Even with further research, we were unable to verify the author’s identity and credentials as a health and fitness expert. The amount of available and researchable material just doesn’t match what you would expect from someone with such supposed achievement claims.
  • In several instances, the author makes controversial statements about weight loss and simply expects the readers to take his word for it. For example, he states that the primary reason that other diets fail is because they do not produce results fast enough but he doesn’t provide any statistical support.
  • There’s a disturbing lack of medical and scientific support included in the program, especially regarding the safety of the methods and losing that amount of weight so quickly.
  • This program lacks proof of real life results. Even testimonials from medical professionals or before and after photos of real individuals who have used this weight loss program would make the basic principle of the product ever so slightly more convincing.
  • Strongly recommends the additional purchase of supplements in order to achieve ultra-fast and effective fat loss.
  • There’s not much substantial material along the different sections. This program may cover every aspect of weight loss, but it covers them shallowly.
  • Customer support appears to be either extremely inefficient or non-existent. We sent out an inquiry and never received a reply.
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3 Week Diet Key Product Details

3 Week Diet Product Lineup3 Week Diet is a program that covers the weight loss trifecta of dieting, exercise, and motivation and is intended to produce extremely quick fat loss results, guaranteeing to shed off 12 to 23 pounds in only 21 days. Expect this program to change your eating habits, teach you to follow a strict eating program that restricts carbohydrates while utilizing strategic protein consumption, go on an exercise habit, and keep a close eye on your progress.

The man behind this weight loss plan is Brian Flatt. According to his website, he’s a sports nutritionist, a health coach, and a personal trainer who has been in the fitness industry since the 90s while also serving as the owner of REV Fitness, a personal training studio located in Southern California. On top of that, Brian’s profile also states that he graduated from the San Diego State University with a degree in Biology.

As for the program itself, it is separated into different manuals with each covering a topic in the weight loss trifecta plus an introduction manual. The introduction manual gives you a basic idea of how the whole 3 week program works and also clears up some diet concepts like the food pyramid and metabolism.

The diet manual forms the meat of the program and is basically composed of three phases, with each phase being one week long (for a total of 3 weeks and thus the title of the program). This diet plan tells you what you should be eating on a daily basis, how much you should be eating, and when you should be eating them. It identifies exactly which foods you need to eat in order to maximize the fat burning potential of your body, and also enumerates the exact foods you need to completely avoid due to their ability to stop or stall the body’s process of burning fat. In the first week alone, you are told to expect a weight drop of approximately 10 pounds.

According to the 3 Week Diet, you absolutely must create a calorie deficit in order to lose weight. In fact, this diet attempts to fool the body into going into starvation mode 24/7, and ultimately, have you lose around 1 pound of body fat each day. The main premise behind the creation of the 3 Week Diet is that a weight loss program must be able to produce visible and significant results fast to keep the dieter motivated and continue working towards their weight loss goals.

There’s also a section about calculating your lean body mass versus your fat percentage so that you can adjust your rapid weight loss plan based on your body type.

As for the exercise component covered in the workout manual, it’s mostly about body weight exercises and Kettlebell workouts. In other words, you won’t need gym equipment or heavy weights. Four different workout routines are provided within the program.

The mindset and motivation manual covers simple goal-setting basics and keeping a journal. None of it really stands out compared to the ones you typically see with other weight loss programs.

3 Week Diet Prices and Packages

$47, Standard Package

  • “The 3 Week Diet: Introduction Manual” e-book.
  • “The 3 Week Diet: Diet Manual” e-book.
  • “The 3 Week Diet: Workout Manual” e-book.
  • “The 3 Week Diet: Mindset and Motivation Manual” e-book.

3 Week Diet Name Logo

Our 3 Week Diet Review Verdict

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3 Week Diet is a weight loss program designed for speed. It is designed to help you get rid of 12 to 23 pounds of body fat, take off 2 to 4 inches from the waistline, drop 2 to 3 sizes in dress size, and numerous other benefits — all in just 21 days. Although millions of individuals have supposedly benefited from this diet plan, the available and researchable evidence to back up this claim range from hard-to-find to non-existent. Extravagant claims with minimal evidence as well as risky methods without supportive scientific and medical basis are critical red flags. Therefore, we are really left with no other choice than to give 3 Week Diet a 2 out of 5 stars rating.

There are just a lot of unsubstantiated claims by this program. Phantom quotes from alleged doctors claiming that 20 pound weight loss in a week is possible and safe if done correctly (we know it’s possible because professional athletes like boxers and MMA fighters do it. But for a normal person, very doubtful), flabbergasting revelations that the entire diet and fitness industry is rigged by big companies, or that people don’t reach their ideal weight because they don’t see results fast enough; these are just some claims made in the program that the author expected us to believe without any evidentiary support.

With regards to other aspects of the program, we tried to contact the support team with some questions. We were simply met with silence. The email had no indication of bouncing, but we received no reply nonetheless.

There’s just too much question marks surrounding the program for anyone to even bother with it. Even if you have tried just about every single diet and exercise product out there and are desperate for anything new, this is just not a program worth putting your money on.

Our Final Recommendation: Don’t Buy 3 Week Diet

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this works...

Jul 31, 2015 by Laura Gonda

I had absolutely no issues with buying the product and downloading the PDF. I am at day 5 and this is my first successful attempt with losing weight in the past 2 years. I am not using any recommended supplements - this diet works well even without those. So far I lost 2 kilograms or a bit more. I can only recommend this to anyone. I have big hopes for the remaining 2+ weeks.

Response: That is very great news, Laura. We are very happy for you. Thank you very much as well for sharing your positive experience with this product. This review only gets better with all the different perspectives generously shared by you, our readers.

not a scam...

Jul 03, 2015 by Kerri Shepheard

I just wanted to put on here that this program is not a scam. I had no problem going through, purchasing, and then downloading. It does make it a little complicated but it is not a scam. It tries to get you to buy additional things (one of which I bought, the cookbook was too tempting!) but at the bottom, in tiny writing, it says something along the lines of give up this great deal forever. If you only want the manual just keep hitting that and you will eventually get to the page where you can download. I only gave 3 stars because I just bought it about 15 minutes ago and cannot attest for the weight loss factor. Just wanted to say that although it tries to get you, it is not a scam.

Response: Thank you very much Kerri for sharing your experience and your thoughts on this product. This would certainly help our other readers get a more complete perspective. We also appreciate that you pointed out both the pros and cons of your experience. Objectivity, as reflected in our reviews, and unbiased information is the thrust of this website.

3 weeks diet works great...

May 31, 2015 by Kasia Claussen

My mom and I lost 35 and 37 pounds using this program. My boyfriend has 3 sisters hooked on it. They have completed week 1 and have lost 7-10 pounds each.

Response: Hey Kasia, thank you very much for sharing your experience regarding this product. Congratulations on your results and we hope to see you more often in our website. We appreciate your contribution and support.

do not fall for this scam...

May 14, 2015 by Rita Kordsmeier

I was unable to download the product and unable to get in touch with anyone. I immediately tried to cancel but they had already billed my account. It has been two months and I have yet to see any refund. My first reply was - I will start the process to refund your payment right away. The following month it was - Apologies for the wait, I will make sure it goes through ASAP. Another month has gone by and still no refund! Total scam to get your money!

Response: Hey Rita, we are sorry to hear about your bad experience with this product. We agree that the company behind this program operates in a shady manner. This fact is reflected on our review. We hope we could help, but it has been two months since you purchased the product. Chances are a refund request can no longer push through. However, we would like to thank you for sharing your experience on our website. Hopefully it would keep our other readers from falling for the bad practices of this merchant.

do not buy...

Feb 10, 2015 by Penny Cole

Do not buy from this person. I asked for refund, 6 weeks later all I get is - I will get this to you right away. I am working on this. No problem, you will see your money in 6-10 business days. I really stand behind my personal guarantee - I hate to see how he places a guarantee to his kids, parents, or wife and find out how they handle it.

Response: Thank you very much for sharing your experience about this product, Penny. Negative as it may be, this would really help our other readers make a more informed purchasing decision regarding this program. We also apologize that our negative review was not able to prevent you from buying this product; maybe you were able to come across our website after you have already purchased. Regardless, on behalf of our organization and our readers, we appreciate you taking the time to share your experience with this program.

do not buy...

Dec 27, 2014 by Maya Olmaz

I just purchased this e-book thinking it was 47 dollars; and sure enough as soon as I put my Paypal account I got into a page that forces you to buy all these extra books and there was no exit. I hit the back button to cancel a couple of times and it automatically had me purchase the first extra option which was another 60 dollars. This is a total scam; I called the Paypal support and they apparently have a lot of complaint from this company. Unfortunately, I have to wait until Monday to talk to the customer service which, as I was told by Paypal, are hard to get in touch with.

Response: Greetings Maya, we are saddened to hear about your negative experience with this product. We also apologize if our negative review failed to dissuade you from purchasing this product. We only review the product and have no control over how the product merchant behaves beyond our published review. However, we do appreciate you for taking the time to share your ordeal in our website; lots of our readers would definitely benefit from it. In any case, feel free to contact us (using our contact us form) and we will try our best to help you get in touch with the product merchant.

2.7 5.0 6 6 I had absolutely no issues with buying the product and downloading the PDF. I am at day 5 and this is my first successful attempt with losing weight in the past 2 years. I am not 3 Week Diet Review