21-Day keto CHALLENGE

✅Get into ketosis, ✅ lose fat, ✅ reduce body inflammation ✅ and finally feel great about yourself.


Would you like to lose weight without having to go hungry?

  • Keep constant energy levels and feel mentally sharp all the time?
  • Reduce your body inflammation?
  • Finally try this miraculous Keto Diet everyone praises so much?

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

21 Day Keto Challenge

Keto Challenge is a powerful 21-Day journey to help you get rid of unwanted weight and boost your longevity. 

Over 21 Days you will learn how to follow Keto Diet in an easy and sustainable approach as compared to other more strict Keto Diet approaches. All you have to do is to track your carbs (max 20g of carbs a day allowed) and eat more healthy fats. We show you how!

The 21 Day Keto Challenge provides you tools to nail the Keto diet and make it a sustainable lifestyle by sending you daily check-ins packed with educational information on Keto and what foods to eat, Keto friendly recipes and further tips to accelerate your ketosis. With our daily emails, you get to track your success, keep motivated and engaged over the entire 3 weeks.

We break down all the information you need to know in short digestible format and deliver it day after day in your email inbox, 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


fast fasting

Increase your energy and focus

All benefits of Keto diet:

  • Reduce appetite
  • Stabilize energy level
  • Reduce blood sugar and insulin levels
  • Reduce body inflammation
  • Help treat skin conditions (e.g. acne, eczema, psoriasis)
  • Reduce sugar and high-carb food cravings


The 3-Week Curriculum in a nutshell

As soon you sign up to the Challenge, you will receive a comprehensive Challenge Guide and Recipes book, that allows you properly prepare for the start!
You will find info on the challenge guidelines, how to calculate net carbs, what to drink and eat (and not), how to avoid side effects, get tools to track your progress and much more!

During the first week of the Keto Challenge you will be introduced to the basics of the Keto Diet, science of Ketosis and learn how to ease-in into the new way of eating. You will receive comprehensive list of foods you can eat (and shouldn’t!) and get tips how to upgrade your cooking skills to fit Keto lifestyle.

In addition, you will be introduced to the habit building science and as part of it, learn to identify the cues that trigger your temptations for unhealthy foods. With help of few simple rules, we will show you how to define a solid action plan for success.

In the second week you will learn more about Keto nutrition and will be introduced to the powerful strategies that will allow you to stay on track with your goals. We will look deeper into different actions and tools that will help to test Ketosis and escalate your results. As the week advances, you will get to apply more behavioral science methods to ensure success of your new Keto lifestyle.

The last week of the challenge is focused on making sure you can sustain the Keto Diet once the Challenge is over. You will get to try a strict macro tracking to test how your body and mind reacts to the more advanced Keto strategies. In the end of the week you will suddenly find yourself in a better shape, notice a clearer skin, less inflammation and will feel more energized and focused through the days.


& GET ALL INFO INSTANTLY to your inbox




All of this included when you sign up today:

  • E-book 21-Day Keto Challenge Guide with 14 pages of comprehensive information about Keto (pdf)​
  • E-book with 21 Keto Recipes with all macros listed incl. meals, snacks and deserts (pdf)
  • List of what to Eat and Not to Eat on Keto (pdf)
  • 21-Day Challenge Action Plan​ (pdf)
  • Daily action, further learning and inspirations in your inbox. No App needed!
  • Progress Tracking Sheet​ (pdf)
  • Accountability buddy to help you complete the challenge successfully
  • Exclusive community of like-minded people from all over the world
21 day Ketogenic diet challenge

Available DATES:

  • October 21 - November 10 (only 3 spots left - don't miss it!)
  • October 28 - November 17 (7 spots left)
  • November 4 - November 24
  • November 11 - December 1

Secure your spot before it’s gone!

Happy people, who already transformed their bodies with:

21 Day Keto Challenge

21 Day Ketogenic Challenge Diet
$ 29
One-time payment in USD


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

  1. You receive confirmation, the Challenge Guide (pdf) and Keto Recipe book (pdf) straight to your inbox.
  2. From Day 1 till the very end, we will be right there sending you daily actions + learnings, reminders and extra tips to your inbox. No app needed!
  3. To make sure you’re getting the most of your challenge, you’ll get assigned to your accountability group on Facebook (exclusive group). Your habit coaches will be there for your in case you get any questions.

The challenge starts each Monday, and you need at least 1 day for your encouragement emails to be triggered.

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

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.

The main challenge guide does not include a meal plan but you do receive 21+ delicious Keto Recipes with all the macros listed so you can mix and match as you wish.

We focus on teaching you to eat Keto by choosing the meals you love, without having to follow a limited diet plan.

Unlike other more strict Keto Diets, we use a more holistic approach to Keto for our Challenge. We know that counting all the macros feels overwhelming, especially in the beginning, hence our approach is ideal to ease-in into Keto lifestyle and ensures you do not quit along the way.

Our challenge is based on following rules:  max 20g of carbs a day and focus on high quality fat.
As long you stay within the recommended 20g of net carbs a day limit, you are free to adjust it to your preferences, be it vegan diet, gluten-free, etc. As part of the challenge you receive a recipe book which provides you ideas for the 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 Keto diet.

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.

We have no-questions-asked refund policy for all refund requests made within 24 hours of purchase. Due to the nature of the intellectual property, we will not be able to provide refunds after that. Exceptions can be made in the case of a medical emergency accompanied by reasonable evidence, or if you contact us at support@21dayhero.com.

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

Keto Diet has gained lots of popularity over the past years, and thousands of people have reported achieving great results while being on it. Various researches have proven it being one of the most effective weight loss tool, besides offering other health benefits, and with our help you can experience them for yourself.

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 Keto challenge, we help you identify your triggers for poor food choices, define your daily actions that support​ your goals and reward you for taking them.

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 Keto Diet and how to make it work for your, you will also get introduced to the basics of healthy nutrition.

Improve nutrition and relationship with food

No complicated Macro tracking

Unlike other more strict Keto Diets, we use a more holistic approach to Keto for our Challenge. We know that counting all the macros feels overwhelming, especially in the beginning, hence our approach is ideal to ease-in into Keto lifestyle and ensures you do not quit along the way.

Reduce body fat with intermittent Fasting

Developing a habit that makes Keto easy

The 21-Day Keto Challenge is designed to help you ease-in into the Keto lifestyle and introduced you to the more advanced techniques as the time goes on. In the end of the challenge you will know exactly what foods to eat and will no longer feel overwhelmed with choices. You will get a solid base for advancing to more strict Keto methods, if prefered.

fast fasting

Keeping you engaged

While participating in the challenge, you receive daily emails from us with special tasks for each day. This keeps you motivated to continue your Keto 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 Keto Diet

Vinny Guadagnino Instagram Keto diet

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.

21 Day Keto Challenge

$ 29
One-time payment in USD
This Challenge includes
  • Access across all devices
  • Full Lifetime Access
  • E-book 21-Day Keto Challenge Guide (pdf)​
  • E-book 21+ Keto Recipes with Macros (pdf)
  • 21 Day Challenge Action Plan
  • Daily Action Tips through Email
    (for 21 days, in Email)
  • Exclusive community of like-minded people from all over the world

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