21 DAY intermittent fasting CHALLENGE


  • 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


Intermittent Fasting is an eating pattern where you alternate between periods of fasting and periods of eating.

Intermittent Fasting gained a lot of attention lately, mainly due to its potential anti-aging and weight loss benefits. While there are several Intermittent Fasting methods, the most common one is the 16/8 method which means 16 hours of fasting and 8 hours of eating every day.



8 hr eating

Consume all your food within
the 8 hr window


16 hr fasting

Pick a fasting window that suits
your personal schedule


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


21-Day Intermittent Fasting Challenge is a perfect way to try out the fasting method that took Silicon Valley and all the weight loss community by storm.

I know you probably have a lot of questions now, like what can I eat while I’m fasting? Can I drink coffee? What should I eat during the eating window?

Well, you’re in the right place. All 21 Day Intermittent Fasting Challenge participants receive a comprehensive Challenge Guide, that includes:

  • What Intermittent Fasting is and how it works
  • How to use Intermittent Fasting to lose weight and increase productivity
  • Daily plan for each day of the 21-day challenge
  • Daily Fasting Tracking Sheet
  • Recommendations for the best Fasting Tracking Apps
  • Extensive FAQ section with the most popular questions answered

and that’s not all…as a BONUS you receive:

  • Access to a community of like-minded people who are on the same weight-loss journey
  • Support from our expert habit coaches who will help YOU build healthy habits and a next-level morning routine


Emily Lai
Emily Lai
Entrepreneur, Digital nomad
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.
Matt Schaffnit
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.
gained weight after moving to a new country
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!


and get:

  • 21-Day daily Intermittent Fasting plan​
  • E-book 21-Day Intermittent Fasting Challenge Guide (pdf) with everything you need to successfully master the Intermittent Fasting diet and lifestyle​
  • Probably the most comprehensive FAQ section, answering questions such as what exactly you can drink while fasting, how to combine Intermittent Fasting with exercise and much more​
  • 21-Day Intermittent Fasting progress tracking sheet​
  • Exclusive community of like-minded people from all over the world
$ 17 One-Time Payment

⬇ Be like Josh. ⬇

JOIN hundreds of people who
chose to improve Their lives.

Already took this challenge

It’s quite simple. Once you sign up and confirm the payment, it goes like this:

  1. You receive confirmation and the Challenge Guide (pdf) straight to your inbox. 
  2. From Day 1 till the very end, we will be right there sending you thoughtful reminders and extra tips
  3. To make sure you’re getting the most of your challenge, our habit coaches and the community of people on the same journey will be available for you, whenever you got any questions.

It starts when you want it to start. 

In the sign up form you will be able to choose the date you want to start this challenge at.

A lot of people choose to start on Monday and that works great. The only thing you need to remember is to always choose a date that is at least 1 day ahead in order for your encouragement emails to be triggered!

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.

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.

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.

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. 

Reach out to us on hello@21dayhero.com and we will answer any questions you might have. 


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It’s so much more fun and motivating to do it together!

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