The Underground Fat Loss Manual Review

The Underground Fat Loss Manual is an online weight loss program designed to help people decrease their body fat quickly and effectively using proven fat loss techniques that are 100% natural. There’s no denying that the weight loss industry has many best-kept secrets that they withhold from people trying to lose weight in an effort to maximize revenue. They give people just enough information to produce results but not enough for them to be able to keep the results coming on their own. As a result, you end up buying the branded diet food, you keep renewing your gym membership and you keep paying a recurring fee for a trainer or specialist. We have all fallen victim to it but times are changing and experts are revealing their secrets. The Underground Fat Loss Manual is an online program that lets you in on proven fat loss techniques that are 100% natural. It’s a comprehensive program that teaches you a scientific method that uses all aspects of nutrition, including macros, timing and much more, to achieve rapid fat loss results.

The Underground Fat Loss Manual Review


What is The Underground Fat Loss Manual?

There are many rapid weight loss techniques that have shown to effectively decrease body fat levels in both men and women. There’s no magic to it either, nor do you have to spend all of your free time at a gym running on a treadmill while simultaneously following a bland diet plan that makes you feel miserable. You just have to make some specific changes in your life that boost your body’s natural fat burning properties and that’s precisely what this program teaches you how to do.

The Underground Fat Loss Manual is an online program that teaches you effective ways to achieve rapid fat loss results. It’s a comprehensive program that teaches you a powerful method that consists of 100% natural fat loss tricks that can lower body fat levels by 6-8% in men and 12-16% in women.

Throughout the program, you learn what these rapid fat loss secrets are and how to implement them into your day simply by making smarter choices. One of the main techniques The Underground Fat Loss Manual is based on is proven to help you lose 8.36 pounds of fat in 3 days.

Now, I’ll delve into the details in just a moment but all of the hacks, secrets, and tricks you learn come with an abundance of information that explain exactly how they work. They’re also put together for you into a 15-day regime that allows you to easily learn and implement the methods. The program also comes with optional techniques you can use to kickstart your weight loss journey, a Quick and Easy Body Fat Calculator, and expert advice for using these healthy, natural and proven ways for reducing body fat levels. All of this is separated into different guides for a stress-free, organized experience. Here’s a sneak peek at what those are:

  • The Main Manual
  • Free Bonus #1: The 10-3-X Report
  • Free Bonus #2: The 60 Second Hormone Fix Report
  • Free Bonus #3: The Ageless Abs Report
  • Free Bonus #4: The Secret Supplement Stack That Fitness Models and Actors Use to Get Ultra
  • Free Bonus #5: Simple Trick Men Can Use

You receive instant access to all of this as soon as you purchase, as everything is digital. So, you can download the materials right onto your smartphone, tablet, laptop or desktop computer for quick and convenient access wherever your days take you.  This is really easy to do and the author of the program has also provided step-by-step instructions for doing so.

Download Page
A preview of the program’s download page.

In addition to being backed by research and scientific studies, The Underground Fat Loss Manual is also supported by a 60 Day Money Back Guarantee. This gives you two months to try the program out and see how the rapid fat loss hacks work for you. Keep in mind, it is proven that these methods can help you lose more than 8 pounds of fat in just 3 days.

Who Created The Underground Fat Loss Manual?

The author of The Underground Fat Loss Manual is certified personal trainer, Matt Marshall. Matt is well established within the industry and is the owner of Fitness Under Oath. He has dedicated his career to helping people achieve rapid fat loss in the midst of a busy, modern schedule and life.

Quick Overview of The Underground Fat Loss Manual

The Underground Fat Loss Manual is a comprehensive program that teaches you unconventional, fact-based, effective and natural rapid weight loss secrets professionals have used within the industry for years. The program comes with a main manual plus several different bonuses that provides you with all of the information, studies and steps needed to start understanding how quick fat loss works. Then, the program puts all of your newfound knowledge into a four-week regime that allows you to easily implement the things you’ve learned to get the rapid fat loss coming.

To begin, you simply access the main manual either online or on your personal tech device. The program walks you through chapter-upon-chapter of powerful techniques that can hijack your fat loss. The chapters come with direct links to recommendations, including a link to the Quick and Easy Body Fat Calculator where you can find your body fat percentage. From there, you’ll be able to customize the information provided to maximize your weight loss.

The program finishes off with some maintenance tips, expert advice and extra appendix for additional techniques.   

Here’s a more detailed look at the program’s breakdown:

  1. A Cheat Code for Getting Lean
  2. About this Program
  3. Why Single Digit Body Fat
  4. Congrats! You’re Fatter Than You Think
  5. 100% Mental
  6. Normal Diets vs. Bodybuilding Diets Vs. This Method
  7. The First 3 Days
  8. Days 4-13
  9. Day 14: The Cheat/Refeed Day
  10. After The First 4 Weeks
  11. Maintenance Mode
  12. A Collection of Advanced Tips
  13. Magic Foods for Fat Loss
  14. Hunger
  15. Loss of Muscle, Loss of Testosterone and The Monster Under The Bed
  16. Family, Friends and Other Obstacles
  17. Parting Words
  18. Appendix A: What I Ate
  19. Appendix B: Recommended Workouts
  20. Appendix C: Supplements
  21. About The Author & Private Invitation For You
Manual's table of contents
A look at the program manual’s table of contents.

Our Opinion

Advantages of the Program

Getting the inside scoop on fact-based rapid fat loss secrets is certainly a main advantage to using The Underground Fat Loss Manual. Whether you’re using this program to ramp up your fat loss prior to an event or to see substantial fat loss with minimal effort, this program can help. It is infused with scientific resources and facts, and even comes with a Money Back Guarantee for those who are skeptical. The guarantee is for 60 days, which means you can do the program two times over again to see how the rapid fat loss secrets work for you.

I really liked how the program is designed specifically for those who don’t have a lot of free time to dedicate to their weight loss journey, but who still want to shed stubborn pounds. It’s quick to do and the steps are practical and come with precise instructions. It’s also a lot of fun to get an inside scoop on things.

The digital version of the program makes it super easy to use, as you have access to all of the material right on your personal tech devices.  

Disadvantages of the Program

While there are many advantages to having the program available in digital format, it would be nice if you had the option to download it in audio format too or to receive a physical copy. This would allow people from all walks of life to use their preferred version.


The Underground Fat Loss Manual is an unconventional program designed to teach people fact-based rapid fat loss techniques that weight loss experts have used to decrease their body fat levels for years. It comes with an abundance of techniques that have proven to speed up the body’s natural fat burning capabilities, so you can see quick, substantial fat loss. The program can be used by both men and women, with an emphasis on men and everything is put together for you in a four-week action plan. It’s short and simple, and is proven to help men lower their body fat by 6-8% and 12-16% for women. The program is also backed by a 60 Day Money Back Guarantee, giving you two months to try it out and see how these rapid fat loss hacks feel for you.  

download The Underground Fat Loss Manual PDF


Does the program come in a hardcopy?

No, everything is entirely digital. This allows for instant access and quick and convenient access as you navigate through the four-week regime. You don’t have to wait or pay for shipping, and you don’t have to carry a physical book around with you. Everything is readily available to you at your fingertips. Alternatively, you can download the materials and print it off at home if you would still like to have a physical version.

Is the program safe?

Yes, the program should be safe for all to use as it does consist of natural, fact-based methods. However, it does mention that it “isn’t for wimps” and does consist of calorie restriction along with effective resistance training. So, if you have any doubts, concerns or underlying health conditions, you may wish to speak with your doctor before continuing.

Is the program about diet, exercise or both?

The program is a combination of rapid fat loss tips and tricks that pertain to both diet and exercise, as well as other factors, such as your social pressures.

Who do I contact if I have a concern or question relating to the program?

On the member’s download page, you’ll find the author’s contact details where you can send off a message or phone call for further assistance. You can also drop us a comment and we will see if we can help you out.


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(as of 27th May 2024)