
Pawel's sustainable weight loss
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Lost 63kg
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Pre-diabetes into remission
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Used programme alongside weight loss medication
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Blood pressure improved
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Stopped snoring
More than a diet programme
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Education on science-based lifestyle best practices
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Easy and delicious nutritionist-developed recipes
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Tailored exercise and meal plans
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Personalised tracker and exclusive community
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FREE 7-day trial, start today!

Weight loss and fasting nutrition
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Keep you full and satisfied
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No added sugar or simple carbs
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High in protein, fibre and quality fats
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100% vegetarian and made from natural ingredients
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Essential vitamins and minerals

Intermittent fasting success stories
We’ve helped over 120,000 people just like you lose weight, keep it off and improve their health

Losing 21kg has given me a new sense of freedom, and I'm finally off all my medications.

I was on two separate medications and by the end of the 12 weeks, I had dropped down to one.

The programme flexibility is the main reason for our success - we've lost 51kg between us.

Losing 6 stone (38kg) has absolutely changed our lives.
Natural weight loss and fasting products
The Fast 800 Shakes are developed to give the nutrient blend to keep you full and satisfied throughout the day.
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Our story
Dr Michael Mosley was a pioneer of intermittent fasting. In 2018, he co-founded The Fast 800 with Dr Clare Bailey Mosley to make scientifically-based weight loss and health strategies accessible to more people.
In continuing his father’s legacy, Dr Jack Mosley has written a book to emphasise the importance of sustainable diet and lifestyle habits alongside weight loss injections. We commend his writing to support weight loss medication users achieve long-term success.
Our programme and health support products, including meal replacement shakes, help people lose weight, stay healthy, and live longer and are compatible alongside weight loss medications like Ozempic and Mounjaro.
Try the Programme for free
Sign up today and your 7-day free trial begins immediately. Week One of your programme will start on: Monday 9th June
How much does the programme cost?
Joining is as easy as clicking here to join via our website, OR making payment via the Google Play / App Store (search for The Fast 800).
Joining on the website
To join our 12-week guided Programme via the website, you will pay per month for three months. This includes a 7-day FREE trial.
Once you have completed your 12-week Programme, you will receive a bonus FREE month of Graduate Support Membership to continue or maintain your results.
You will automatically transition to our monthly Graduate Support Membership for per month, unless you cancel before the end of month four.
Once you are in month five, you may cancel anytime.
Joining on Google Play or the App Store
The pricing structure and membership options are slightly different on the app stores, simply proceed through the signup and checkout process to see available pricing and membership options. You can also take advantage of paying in your region’s currency on Google Play and the App Store.
Please note:
- All offers are ONLY available through website signups for new members
- You can still download and use the app once you have signed up via our website
What's included in the Programme?
Our Programme teaches you the health benefits of a moderately low-carb Mediterranean-style diet, so it becomes a way of eating for life. It is based on the latest science and takes an evidence-based approach to healthy living focusing on nutrition, movement, behavioural change and sustainable lifestyle.
It includes:
- Education around science-based lifestyle best practice
- Weekly, time-saving meal plans – vegetarian and non-vegetarian – with automated shopping lists
- The Very Fast 800, The New 5:2 and The Way of Life approach plans, some with Keto options
- Exercise plans, incorporating HIIT and resistance training, designed for beginner to advanced levels as well as a library for further stretching, yoga and pilates videos
- Trackers to measure waist, weight, HbA1C, mood and sleep
- 800+ easy and delicious, nutritionist-developed recipes
- Mindfulness meditations
- Core learning content, plus access to exclusive articles
- Support tools for liaising with your usual treating doctor
- Access to a lively Community so you can chat with your fellow members and/or ask our online health coaches for support
How does the free trial work?
Your programme for weight loss and long term health starts straight away.
When you click “start now”, you’ll be asked to create an account. Once your account is set successfully, please go through the checkout process, which requires you to enter credit card details, to trigger your access to the personalisation quiz and the start of your 7-day free trial. Your credit card will only be charged if you do not cancel prior to the end of the trial period. Please note, once you cancel the free trial, you will lose access to your account straight away.
Who should avoid a low calorie diet or fasting?
The Fast 800 programme is not recommended for the following:
- People who are underweight and/or experiencing an eating disorder, or have a history or suspicion of an eating disorder
- Children (under 18 years old)
- Type 1 diabetics
- Pregnant women, breastfeeding mothers or anyone undergoing fertility treatment
- People who have a significant psychiatric disorder or substance abuse
- People who are under active investigation or treatment, or have a significant medical condition affecting ability to comply with diet
- People who have had a recent cardiac event, myocardial infarction or cerebrovascular accident (<3 months previously) or other heart abnormalities
- People who have had uncontrolled heart disease, uncontrolled hypertension, or kidney failure
- People who are feeling unwell, have a fever, are frail or recovering from significant surgery (<6 months ago)
- People who are on insulin. This is to avoid a potentially dangerous drop in blood sugar (hypo)
- People who are on ‘flozin’ medication (known as SGLT2 inhibitors, taken to reduce blood sugars). This is to avoid the rare complication and potentially dangerous condition called euglycaemic diabetic ketoacidosis (DKA), where despite having normal or only mildly raised ketones the medication can mask a serious complication of diabetes requiring urgent attention
Please read our medical disclaimer for additional information.
How much weight will I lose?
The DIAMOND Study performed by Oxford University and Dr Clare Bailey looked at the feasibility of using an 800 calorie, low-carb, med-style diet as a treatment for people with type 2 diabetes.
After 8 weeks the average weight loss was 9.5kg, sustained over the course of the trial.
Results also included a significant drop in blood sugars, blood pressure and the use of medication.
Can I re-start the 12-week Programme after I start?
As the Programme is guided, you are unable to pause or restart the course.
You can view content from previous weeks and you also receive a free four week trial of the monthly subscription service at the end of the 12-week Programme, to allow you to catch up on any missed content.
What is the intermittent fasting diet?
What is Intermittent fasting?
Intermittent fasting is a strategic eating pattern that cycles between periods of eating and fasting. Research has shown that a diet plan for intermittent fasting can be an effective method for weight loss and offers numerous health benefits.
What is The Fast 800 AU and how can it help me?
The Fast 800 AU is your first step towards a sustainable, empowering transformation. Thanks to our extensive research, we’re redefining how Australians lose weight and achieve wellness through a comprehensive approach, including a diet plan for intermittent fasting, nutritional education, exercise, and a supportive community.
What can the intermittent fasting programme offer me?
Our intermittent fasting Australia programme is comprehensive, personalised, and easy to follow. It blends education, customised diet plans, regular health tracking, daily workouts, access to a thriving online community, ongoing support, and resources to guide you on your journey towards healthier living.
Can The Fast 800 fasting programme be tailored to me?
The Fast 800 intermittent fasting programme is customised to align with your goals, circumstances, and preferences. Regardless of whether you’re new to intermittent fasting or wanting an upgrade to your current routine, our comprehensive programme is your formula for long-term success.
Is intermittent fasting with The Fast 800 sustainable
Explore the world of intermittent fasting in Australia. The Fast 800 is not a fad diet but a sustainable lifestyle designed to be part of your day-to-day life.
What resources and support does The Fast 800 offer?
Familiarise yourself with our extensive resources, try new recipes from a wide range of cuisines, browse our support products, and read through inspiring success stories from members of our community. With The Fast 800, you are part of a network of like-minded individuals across Australia, all sharing a collective intermittent fasting journey.
What kind of support does The Fast 800 provide?
We strongly believe in the power of community. As part of The Fast 800, you will always have our team ready to guide you, answer your queries, and help you overcome any challenges. Our online community of members offers a plethora of shared experiences and is also invaluable in maintaining your motivation.
What happens after I achieve my weight loss goal?
At The Fast 800 AU, we’re not just about helping you reach your weight loss target. We want to give you the knowledge and habits to maintain a healthier lifestyle for the long term. We’re here to support your journey, even after you’ve hit your goal.
Is The Fast 800 more than just a diet?
Your custom intermittent fasting diet is designed to help you shed excess weight while inspiring a love for eating healthily and mindfully. The Fast 800 empowers you with the tools and knowledge you need to maintain healthy food and movement habits for life.
How does The Fast 800 approach fitness and health?
At The Fast 800, everything we do is based on solid research and advice from trusted health experts. We give you simple tools to not only lose weight but to get healthier and feel great in your everyday life.
Is the fitness approach with The Fast 800 easy to follow?
Achieving and maintaining your fitness and weight loss goals can be hassle-free with our diet plan for intermittent fasting. Forget about complex calculations and time-consuming planning – say hello to a straightforward, guided approach that’s a perfect fit for your busy life.
Why should I join The Fast 800 community?
Join us in a groundbreaking approach to weight loss and wellness where your health transformation is within your grasp! With The Fast 800, we combine scientific research with a supportive community to offer an intermittent fasting programme that’s changing lives.
How does The Fast 800 ensure sustainable weight loss?
Looking for impactful, sustainable weight loss results? The Fast 800 is a scientifically-sound approach to the weight loss experience, combining expert guidance, evidence-based principles, and an encouraging community, ensuring you’re supported on your wellness journey.
What makes The Fast 800 shakes a game-changer?
Life can be hectic, and on days when you’re pushed for time, maintaining a balanced, calorie-controlled diet can be a challenge. That’s where our shakes help – they’re a time-saving solution to ensure you never compromise on nutritional value. Our shakes are filled with 100% natural ingredients, with nutritional profiles that contribute to a healthy lifestyle and help bolster and sustain weight loss.
How easy are The Fast 800 shakes to use?
Ready in an easy 30 seconds with no cooking required, our shakes offer a simple, no-fuss alternative for meals when you’re on the go. They’re just 200 calories per meal to provide careful portion control, which helps prevent overeating – a common speed bump on the road to weight loss.
How can I start my journey with The Fast 800?
If you’re ready to kick-start your wellness journey with our expert intermittent fasting programme, sign up to The Fast 800 today and tap into the potential of the intermittent fasting diet. Discover a healthier, revitalised version of you today.