If you haven’t looked carefully at The 3 Week Diet, now’s your chance. Here at DietSpotlight we dug deep and created a comprehensive review, examining the ingredients, side effects, customer service and scientific research. Furthermore, we focused on dozens of user comments from all over the internet. Lastly, we compacted all of the facts and feedback to give you the information you need.

3 Week Diet Readers: Click here to find out why we’re giving away samples of our product, Burn HD.

What is the 3 Week Diet?

First off, the 3 Week Diet plan claims to help you drop 12-23 pounds in only 21 days. This program is suitable for women and men of all ages, and it was created by Brian Flatt, a personal trainer, and nutritionist. According to Flatt, this is the fastest diet on the market today. To get started, you simply download the eBook from the website, which costs $47. A specific eating plan and some exercise are required. However, all of the foods involved are readily available in local grocery stores. [1]

We are uncertain when The 3 Week Diet first emerged. This weight-loss program is backed by a 60-day satisfaction guarantee, and there are some customer testimonials presented on the official website, but read on…

Unrealistic Weight-Loss Claims – “A Concern?”

The first issue we found with the 3 Week Diet was the fact that weight-loss claims may be a little over the top. According to our Research Editor, “This system promises 23 pounds of weight-loss in only 21 days, which is very extreme. This means you will drop more than a pound a day, which is not very likely.”

“Did not drop 23 pounds! This diet is unrealistic because you can gain the weight you lose right back. It’s a fad diet! ” stated one person. [2]

Another customer commented, “It’s not healthy to lose this much weight in only three weeks.”

3 Week Diet Complaints – “Another Drawback”

We found some discouraging dieter comments posted on the web regarding The 3 Week Diet meal plan. One individual stated, “Not worth the $47. I wish I had saved my money.”

“Didn’t do what I wanted. On to the next diet program,” said another person.

According to our research, if there is a certain part of a diet program or weight-loss system that is especially bothersome (unrealistic weight-loss claims, too many dieter complaints, bad taste) the chances of prolonged success are not good. So, if The 3 Week Diet does cause a high number of dieter complaints, this could be a major dilemma. [3]

The Science – “Is There Any?”

Sadly the official website for The 3 Week Diet does not present any solid science to support this weight-loss method. Naturally, this is discouraging; especially for us at DietSpotlight because we need to see some documented clinical research that supports the program. [4]


The Bottom Line – Does the 3 Week Diet Work?

Now the moment you’ve been waiting for: our bottom line on The 3 Week Diet. First off, we like that this diet is backed by a 60-day satisfaction guarantee and there are some dieter testimonials posted on the official website. However, we have some reservations about it because it’s not backed by any actual science. Also, we’re concerned about the unrealistic weight-loss claims, as well as the customer complaints we found posted on the web. [5]

If you’d like to drop more weight, then we advise you to go with a diet plan or supplement that is backed by solid science, gives you plenty of bang for your buck and does not make unrealistic weight-loss claims.

Among the best products we’ve seen this year is one called Burn HD. Its formula is a unique combination of four ingredients, which have been proven in documented clinical research to help elevate metabolism and enhance fat loss. Also, we have not found any talk of unpleasant side effects and comments on the internet indicate people see solid results.

The makers of Burn HD are so certain of their product they’re offering a 2-Week Sample, which is a good sign.

Learn More About Burn HD »

Summer Banks Dietspotlight Author

About the Author:Summer Banks, Director of Content at Dietspotlight, has researched over 5000 weight-loss programs, pills, shakes and diet plans. Previously, she managed 15 supplement brands, worked with doctors specializing in weight loss and completed coursework in nutrition at Stanford University. full bio.

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3 Week Diet Review

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3 Week Diet 

What are the side effects of the 3 Week Diet?

Some of the potential side effects of the 3 Week Diet include dehydration, muscle cramps, upset stomach, nausea and vomiting, as claimed by some followers.

What are the ingredients in the 3 Week Diet?

3 Week Diet ingredients include a four-phase diet plan, including the introduction, diet, exercise, will power, mindset and motivational manuals.

How do I know if 3 Week Diet is right for me?

Choosing the right product is the #1 question asked by DietSpotlight readers. We recommend trying any product before buying it and know that finding a product with a sample offer is near impossible – so we created our own product, Burn HD, with scientifically backed ingredients.

Click here to get your sample of our powerful fat burner today.

Does the 3 Week Diet work?

There’s information stating the program is scientifically proven, but we couldn’t locate one study showing the meal plan will help you lose weight.

You may want to think about changing things up a little and replace the 3 Week Diet with a supplement like Dietspotlight Burn, which contains clinically tested ingredients.

How much does the 3 Week Diet cost?

The 3 Week Diet costs $47.

How should I take the 3 Week Diet?

You should take the 3 Week Diet in four phases. The first lasting six days. The second part starts on the seventh and runs to the eighth. Phase three starts on the ninth and ends on the eleventh. The final part begins on the 12.

Is the 3 Week Diet a liquid diet?

No, the 3 Week Diet isn’t a liquid diet. The program consists of eating whole foods.

Do I have to buy additional supplements for the 3 Week Diet?

No, you don’t need to buy additional supplements on the 3 Week Diet. The recommended products are not essential to the program.

Does the 3 Week Diet come with a guarantee?

The 3 Week Diet comes with a guarantee. If you aren’t satisfied with the product, you can return it within 60 days for a full refund.


  1. […] Weddings take a toll on your body as you eat meals made in bulk for hundreds of people and at weird hours. Right after the exhausting three-day long affair you go for your honeymoon trip where you again eat outside food. Not just this, since it’s a new house, you have to adjust to the daily schedule which adds to the stress. A bad diet combined with stress means loss of nutrition. So, essentially, you gorge on calories but do not give your body the essential nutrients. This results in deficiency of vitaman B, calcium, etc. leading to cravings at odd hours and lack of energy. And you wonder why you have suddenly put on 5 kilos. Read – how to lose weight from thighs and hips. […]


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