It will help you to lose weight effectively, improve brain function and boost productivity.


Would you like to reach and sustain your ideal body weight?

  • ... or finally take control of your eating patterns?
  • ...and what about waking up energized and keeping mentally sharp as the day goes by?
  • ... or finally trying this fasting thing weight-loss community and celebrities are going crazy about?

If you answered YES to any of the questions, then you are at the right place.

21 Day Intermittent Fasting Challenge

Intermittent Fasting Challenge is a powerful 21-Day journey to feeling the best you ever felt.

For 21 Days you will follow a clear daily fasting plan which will get you into the lifestyle of Intermittent Fasting.

We will help follow the most sustainable method of Intermittent Fasting, which is so-called 16/8 Fasting method. It means – consuming all your food during 8 hours window and fasting for 16 hours.

The 21 Day Intermittent Fasting Challenge provides you tools to successfully make Intermittent Fasting a habit by sending you daily email check-ins packed with actions to support your Fasting, tips, recipes and educational expert videos to keep you motivated and engaged over the course of the entire 3 weeks.

We break down all the information you need to know in short digestible format and deliver it day after day, following the methods of habit building.

3 main benefits you can expect after successfully completing this challenge*:

Lose weight with Intermittent Fasting

Lose 5-10 Lbs
(2-5 Kgs)

Reduce body fat with intermittent Fasting


Improve nutrition and relationship with food


All benefits of Intermittent Fasting:

  • Lose weight and reduce body-fat percentage
  • Increase metabolic rate
  • Reduce blood pressure
  • Reduce blood sugar levels and risk of Type 2 Diabetes
  • Improve brain function and increase productivity
  • Induce cellular repair processes
  • Increase longevity
  • Boost your immune system, reduce inflammations and rejuvenate skin

Here's what our community on Facebook is saying about the challenge

Challenge Guidelines:


Hours eating

Consume all your food within the 8 hr window


Hours fasting

Pick a fasting window that suits
your personal schedule


Stick to the same eating/fasting schedule throughout the challenge​


The 3-Week Curriculum in a nutshell

Once you sign up, you’ll get all the material you’ll need to succeed once you start the challenge. 

Challenge guide, Daily Plan, Meal ideas and Facebook community of people who are on the same journey. That’s what makes this challenge so powerful!

You will get introduced to different fasting methods, get an overview of foods you can eat (and not), learn about side effects & how to avoid them, how to combine IF with sport, and much more. 

Enroll now! 

The first week sets the foundation for Intermittent Fasting. You will focus on educating yourself about Intermittent Fasting, finding your own fasting schedule that fits your lifestyle and learning how to curb the first hunger attacks.

You will slowly ease into 16/8 Fasting method during the first couple of days, starting with 12/12 fasting first.

You will also learn how to adapt your diet to get the best results and how to incorporate training to best fit your new eating pattern.

Sounds good, right? Join the challenge today.

The second week of the challenge will involve some changes to your diet and fasting timing. Once you feel comfortable with fasting daily, you will get to test your limits and extend the fasting period for a few hours.

Toward the end of the week, you will be introduced to the basics of healthy eating to compliment your new healthier lifestyle.

Are you ready? Join today, start on Monday.

The last week of the challenge is focused on making sure the habit you have developed stays with you for life. You will learn about different types of Intermittent Fasting and tools you can use to stay on track with Intermittent Fasting after the challenge is over.  

In addition, we will help you to build upon your knowledge of healthy eating: you will learn how to make smarter choices and what to pay attention to when deciding on your meals and choosing the snacks.

Includes: daily tasks, pre-recorded videos with experts, motivational tips, access to Facebook group, weekly progress tracking.

Get ready and sign up now!

All of this included when you sign up today:

  • E-book 21-Day Intermittent Fasting Challenge Guide (pdf)​
  • 21-Day Intermittent Fasting Action plan​ (pdf)
  • Daily action and inspiration in your inbox. No App needed!
  • Accountability group to help you complete the challenge successfully
  • Progress Tracking Sheet​ (pdf)
  • Exclusive community of like-minded people from all over the world
Ipad Intermittent Fasting Challenge Guide Plan 21 Day

More reviews of this challenge

Had to return newly bought clothes 🙂
Read More
Still going strong! My daughter graduates college next week, she came to visit these past few days and told me that I really looked like I was getting skinny!💁‍♀️ I had also bought some clothing online for her graduation that I had to send back because all three outfits ended up being too big! I had to go into the store to find something to wear!!!
Matt Schaffnit
Matt Schaffnit
Read More
21-Day Intermittent Fasting Challenge helped me kick-off my Intermittent Fasting journey and as a result, reach maintainable weight loss without having to sacrifice my favorite foods. Something that felt impossible for a long time! The e-book and motivational emails provided just the right amount of support I needed to keep going.
Emily Lai
Emily Lai
Entrepreneur, Digital nomad
Read More
I love Intermittent Fasting because it simplifies my decision making. I don’t have to be concerned with where I can eat or not eat, which clears my mind and frees up my decision making capital I can put towards work and other goals, hence it fits perfectly my busy lifestyle. Also, Intermittent Fasting is a great tool to sustainably maintain my weight.
gained weight after moving to a new country
Read More
It was fun filling this up for 3 weeks and I was happy to see that in just a short time period with minimal workout (spinning class), I lost 3.5 kg. I think IF and at the same time working out helped me a lot in this journey. I’m very happy now because my old clothes fit again and I get many compliments from my colleagues about my weight loss. I feel lighter as well!
Lost weight & improved sleep
Read More
Thank you for your daily challenge emails! Was great information and i appreciate your services. I have developed a great rhythm to eating now and am grateful that I signed up. I see inches coming off my body and feel more better and can sleep!! Yippeeee






Available Dates:

  • November 18 - December 8 (only 4 places left - don't miss it out! )
  • November 25 - December 15 (only 10 places left )
  • December 2 - December 22
  • December 9 - December 29

Secure your spot before it’s gone!


Hi, I'm Tauras.

I am entrepreneur, husband and sort of a self-improvement freak. I am also a co-founder of this platform you’re on right now 🙂

I created 21-Day Intermittent Fasting Challenge, because after doing 16/8 method for over a year myself, I cannot be happier with the results. I’ve lost ±10lbs, trimmed some belly fat and actually increased my morning productivity at least 200% because I am a lot more energized now.

I hope you’ll enjoy this challenge and feel free to reach out personally if you have any questions.

21 Day Intermittent Fasting Challenge
  • 21 Day Challenge Action Plan
  • E-book 21-Day Intermittent Fasting Challenge Guide (pdf)​
  • Daily Action Tips through Email
  • Lifetime access across all your devices
  • Exclusive community of like-minded people from all over the world
$ 29
One-time payment in USD
Intermittent fasting challenge and meal plan
  • 21-Day Meal Plan focused on Intermittent Fasting
    for weight loss​
  • 2 Meals + 1 snack, incl. detailed recipes
  • Weekly shopping list for ultimate convenience
  • Keto, Vegan or Regular Diet plan option
  • Male & Female versions
$ 49
One-time payment in USD
45% OFF


It’s quite simple. 

  1. You sign up and receive confirmation together with the Challenge Guide (pdf) straight to your inbox. If you purchased the Challenge + Meal Plan Bundle you will also receive the Meal Plan in your inbox. 
  2. From Day 1 till 21, you’ll be getting daily info with clear action to take + daily knowledge and inspiration nugget.
  3. You’ll be able to track your progress through the progress tracking sheet in the Challenge guide AND the 2-click tracking system in the email.
  4. To make sure you’re getting the most of your challenge, you’ll get invited to an exclusive Facebook group where you can share your progress and interact with others taking the challenge. Your habit coaches will check in you during the challenge and will be there to answer any questions you might have.

Once you sign up for the program, you’ll receive a confirmation e-mail with the next steps described along with the Challenge Guide Ebook.

If you sign up for a challenge alone, then it does not include a meal plan, but we include a list of meal suggestions you can have while fasting, so you can learn how to use IF for your own diet.

If you purchase a Meal Plan bundle – then you’ll get a meal plan of your choice and all the challenge information. 

You can perfectly start the challenge without a meal plan, as we provide you some meal ideas. But… if you need more professional support – many people have found our Meal Plans be an excellent addition.
You can read more about the Intermittent Fasting Meal Plan by clicking here.

This program is designed with a busy lifestyle in mind. Actually, a lot of people reported feeling more productive due to spending less time preparing and eating meals.

Joining Facebook group is optional – it’s a great chance to interact with others and make connections, yet you can perfectly fine do the challenge without joining the group. 

You will receive daily content and emails from us to keep you motivated, and can always reach out to our team through email if needed.

Yes, all our products are a one-time payment and not a subscription.

If you want to continue your diet after the 21-day period, you will have to purchase a new meal plan. Or continue with a new challenge. No additional charges will ever occur.

Let’s be honest, free things do not motivate us. Cognitive psychologists found out why and they call it loss aversion. In simple terms, we are more motivated by fear of losing rather than a satisfaction of gaining.

It might sound counter-intuitive, but by paying for this challenge, you have a higher chance of successfully completing it and therefore enjoying all the benefits associated with the Intermittent Fasting.

Also – it supports us and our team to keep providing you a ton of useful content that we share every week for free.

Challenge benefits reflect the real-life experiences of individuals who have finished our 21-day challenges or are based on scientific studies related to the challenge topic. However, individual results may vary and we do not guarantee you will experience the same benefits and results as others.

In the days when we might feel like our data is mistreated more often when we want to, at 21 Day Hero we put a great emphasis on making sure your privacy is respected at all times.

As stated in our Privacy Policy, we do not and will never share any personal data we collect (like Name and Email) with any third-parties. 

If you haven’t received your email from 21 Day Hero, please check your spam/junk and promotions folder – it might have accidentally landed there. You can also make a search in your inbox for an email from hello@21dayhero.com.

If after doing the search you are still unable to locate our email, please reach out to us on support@21dayhero.com . We will do our best to help you out!

Well, it’s definitely on us. We’d love to hear more about your questions, concerns or suggestions at support@21dayhero.com 

6 things that makes this challenge worth it

The principles to better health

Intermittent fasting has been around in various forms for ages and has been proven by science to have a significant impact to longevity and disease prevention, such as diabetes, cancer and cardiovascular disease. In addition, restricted time eating has helped many to gain back control of their bodies and shed unwanted weight.

Proven Habit Building science methods

At 21 Day Hero, we use behavioral change psychology of taking tiny steps daily to reach great results over time. During the 21-Day Intermittent Fasting challenge, we help you ease in into Fasting so it is easy to start, identify your triggers for bad behavior, define your daily actions and reward you for taking them.

Improve nutrition and relationship with food

No special food required

Unlike many other diets, you do not have to say ‘No’ to your favourite foods or invest in expensive supplements. Intermittent Fasting is effortless as you can keep eating the same meals you used to, except for adjusting the timing. Over time, you will gain more control of your eating habit and will naturally start craving for healthier alternatives.

Asset 10@2x

Learning more every day

During the challenge you focus on learning one thing at a time without spending more than 10 minutes a day. Not only will you learn more about Fasting and how to make it work for you, you will also get introduced to the basics of healthy nutrition.

Reduce body fat with intermittent Fasting

Developing a long-lasting change

The 21-Day Intermittent Fasting Challenge is designed to help you develop a habit of eating according to the 16:8 method and make the new eating pattern a sustainable routine. The more days you repeat your new habit, the stronger it becomes and the easier it gets.

fast fasting

Keeping you engaged

While participating in the challenge, you receive daily e-mails from us with special tasks for each day. This keeps you motivated to continue your fasting journey and empowers you to achieve greater results. Also, the daily reminders act as a powerful accountability support system.

Not that it matters...but these celebrities swear by Intermittent Fasting

Famous people that do intermittent fasting

Challenge benefits reflect the real-life experiences of individuals who have finished this 21-day challenge. However, individual results may vary and we do not guarantee you will experience the same benefits and results as others.


Your Intermittent Fasting Drink List Cheatsheet is on it’s way to your inbox.

If it’s the first email from us – please check your SPAM folder too!