The simple 8-week path to optimal health, ideal weight & the best food of your life

Hi there! I'm Andrew Olson, the guy behind One Ingredient Chef and creator of The One Ingredient Diet – a simple way to lose weight and achieve better health & vitality. Check out this quick video to learn how eating 'One Ingredient' can make all the difference:

The One Ingredient Diet is an eating plan that's simple enough for a first-grader to understand, but powerful enough to transform our lives: eat plant-based foods that start out as one whole ingredient. Start with whole, fresh, unprocessed ingredients and combine them into quick meals that taste amazing and strengthen our health with every bite. Simple. It's a no-nonsense approach to food that can help us live dramatically healthier & happier lives.

I have been sharing this message through my blog, One Ingredient Chef, for several years and it has been an amazing experience. The unprocessed recipes on this website now help a quarter of a million monthly readers cook better food and enjoy better health. Messages from students who have put this philosophy into practice are constantly reminding me just how powerful real food can be:

I just have to say that I am amazed with this program. I never thought I could live without meat but since the recipes are so good, I really haven't missed it. I have lost 12 lbs without even trying. Having your recipes readily available has been the reason for my success. They are so delicious and filling, I never feel hungry or deprived.

The other amazing thing - I usually have a nagging headache EVERY day. You just learn to live with it. Since day 2 of the challenge, I have not had a headache. I have not popped any aspirin or ibuprophen. That in itself is amazing. Overall, I feel better physically, and I hope as time goes on I will feel even better. I plan for this to be a new way of life for me. Thanks for introducing me to this incredible journey!

- Carol L.

My passion has always been to help people learn to cook with real ingredients so that they can enjoy better food and achieve optimal health. For that reason, I have been developing an all-new program that takes this power of 'One Ingredient' to a whole new level, and I'd love to share it with you...

The One Ingredient Transformation Course is an 8-week online program that's designed to help you easily transition to a healthy, unprocessed diet. It uses fun, interactive learning tools (coaching videos, lesson documents, tasty recipes, engaging assignments, a community forum, and more) that guide you through this step-by-step transformation.

The course is like having your own personal healthy eating coach by your side who teaches you the fundamentals of this unprocessed eating plan and then shows you (week by week) exactly how to take action and build healthy habits that can last a lifetime.


A Quick Tour Inside the New One Ingredient Course

The One Ingredient Transformation Course
Specifically Shows You How To...

  • Boost Your Health & Vitality

    The natural compounds in real food are perfectly designed to boost our health and provide optimal levels of energy to fuel our busy lives. Eat ‘One Ingredient’ and your body can begin to thrive like never before.

  • Reach Your Ideal Weight

    Our modern weight problems are the result of processed food that we were never designed to eat. Switch to whole food and watch your body return to its ideal weight – without counting calories or limiting portions.

  • Enjoy More Delicious Meals

    As any chef can tell you, the fake ingredients in processed food just can’t compete with the flavors of fresh ingredients. The whole-food recipes in this course will have you enjoying the tastiest food of your life.

  • Keep Food Simple

    Crazy meal plans, difficult recipes, exotic ingredients? Leave them at the door. One Ingredient is all about simplifying your life around food so that you can save time, eat better, and become healthier.

  • Thrive on a 100% Plant-Based, Nutrient-Dense Diet

  • Cook Faster and More Efficiently Than Ever Before

  • Fight Cravings for Junk Food and Build Healthy Habits

  • Achieve Lasting Success Beyond These Next 8 Weeks

The One Ingredient Transformation Course –
8 Weeks To Your Healthiest Life

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Join Today & Get Instant Access:

  • 8 Core Lessons (one lesson delivered over each of the next eight weeks)
  • Over 120 pages of lesson material, teaching you the fundamentals of this unprocessed eating plan
  • 10+ coaching videos that guide you through the program
  • Over 65 easy & delicious recipes (about 8 per week) that fit into each week's theme
  • Fun assignments to put what you're learning into practice
  • Membership to the private One Ingredient community message board
  • LIFETIME access to everything above

Registration Now Open: $149 $79

Join the Program

Includes 100% Money-Back Guarantee


Reviews from Other Students

I discovered the One Ingredient Chef website about two years ago. I was immediately hooked. The philosophy resonated with me. Andrew's passion to help others eat better/live better is evident in everything that he does. His recipes are delicious and easy to follow. His new course moves you gradually in the direction of incorporating more plant based one ingredient foods into your diet on a daily basis. By the end of the course you will be eating healthier and feeling better all while eating food that tastes amazing!

Becca P.
Becca P.

I first stumbled upon Andrew's One Ingredient philosophy about a year ago and I have found it to be a huge help in transitioning to a completely unprocessed diet. His recipes are great - my husband loves them so much he doesn't complain about the lack of meat at dinner any more which is a huge step for him (and a huge help for me) 🙂 The new course is great. Andrew's week by week guidance and laid-back approach eases you into the new lifestyle and provides heaps of helpful tips and hints along the way. The support offered through the use of the 'one ingredient community' is great and ensures you have the help you need to succeed on your journey.

- Donna M.
- Donna M.

This course is a great way to get yourself into the One Ingredient lifestyle. Andrew's passion for helping others to have a better life through One Ingredient eating shows in everything he does. He is very helpful when it comes to helping others achieve their healthy eating transformation. The course is easy to navigate and really helps you to be successful in sticking with it. The recipes are delicious and simple to make. I cannot stop telling people around me about how amazing this is.

Rosanne F.
Rosanne F.

The One Ingredient philosophy has completely changed how I look at food, I’m eating and feeling better than ever! The eight week One Ingredient Course will help you successfully and easily transition to a One Ingredient Diet. With its fantastic guidance and support, the transition will happen seamlessly without the stress of going it alone. Give the One Ingredient Diet a chance, you won’t regret it! Like me, you can be healthier and happier!

- Alison A.

Frequently Asked Questions

  • q-iconI Can't Wait to Join! What Happens After I Purchase?

    Once you join, you’ll be able to choose your username and password. After that, you can login to the secure course website and begin Week One immediately. Don’t worry, these instructions will be emailed to you as well.

  • q-iconWhat If I Start Late or Fall Behind – Can I Catch Up Later?

    Absolutely. Once each new week is unlocked, you have lifetime access to all the material. You can catch up at a later date if you miss a week, or go back through the material for a refresher anytime. It’s always there.

  • q-iconThis Program is "Plant Based" - What Does That Mean?

    One Ingredient is a plant-based eating program (meaning no meat, fish, eggs, or dairy) which is a huge part of eating a healthier, cleaner, and more unprocessed diet. Over the first few weeks, the course will show you how to drop these foods (if needed) and thrive on plants.

  • q-iconCan I Take This Course on My Tablet or Mobile Device?

    Yes! All the content inside this course has been carefully optimized to display nicely in all popular web browsers. It works great on iPhones, iPads, Macs, PCs, and even Android devices.

  • q-iconHow Does the Money-Back Guarantee Work?

    I want you to be satisfied with your purchase and feel confident that this program is right for you. I believe you’ll find the material incredibly valuable, but if not, you can use the support form inside the course to request a full, 100% refund anytime within 8 weeks of your purchase. No questions asked.

  • q-iconThe 'Community' Sounds Cool... Will You Be There to Answer My Questions?

    Yes! The community is one of the most valuable parts of this course because it gives you ongoing support from myself and other students. This is the place where you can ask questions, get clarifications, and stay on track in a way that’s just not possible with other systems.

  • q-iconI'm Really Busy… How Much Time Will It Take Me to Do This?

    There’s a ton of material in this program, but it’s designed to be absorbed in weekly bite-sized chunks. Moving through the lesson material shouldn’t take more than 1-2 hours per week and the assignments + cooking time may take between 1-4 hours. In total, it’s a small time investment to setup a whole new lifestyle around healthy eating.

  • q-iconMy Question Isn't Covered Here, How Can I Get In Touch?

    If you have any questions about this program, I’m more than happy to talk directly with you. Simply click here to visit the support page and I’ll get back to you promptly (usually within 1 business day).

Your Complete Step-by-Step System

The One Ingredient Transformation Course is packed with action-oriented resources that can help you achieve better health, but the best part is that, with the help of technology, this is one of the most accessible ways to put an unprocessed eating plan into action.

In the past, if you wanted structured, hands-on guidance with healthy eating, your best bet was to take a $5,000+ retreat with one of the "gurus" in this industry. Even then, you were mostly on your own: what happens when you get back home to a full-time job and hungry kids?

These are problems that the One Ingredient Transformation Course was designed to address from the very beginning – it’s a program that takes 8 weeks to build a solid foundation for ongoing success (including lifetime access to the community to keep you on track long after the course is over).

This is a complete step-by-step system for achieving lasting success with healthy eating, it’s super affordable (less than the price of a decent food processor), but I also want you to feel confident that this plan can work for you, so I’m happy to offer 100% risk-free access to the entire course:

8-Week 100% Money Back Guarantee

When you purchase this course, you’ll receive a 100% Money Back Guarantee for the full 8 weeks. This means you can go through the entire One Ingredient Transformation Course completely risk free. If you are unsatisfied for any reason, I’ll gladly refund your entire purchase price – no questions asked.

Registration Now Open: $149 $79

Join the Program

Includes 100% Money-Back Guarantee