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
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 63kg has completely turned my health around—I've put my pre-diabetes into remission.
Chris and Lindsay's life-changing lifestyle
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Aches and pains disappeared
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Eczema cleared
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Enjoying exercise
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Full of energy
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Lost 38kg together
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.
As seen in
Our story
The Fast 800 was developed by Dr Michael Mosley and a team of doctors and weight loss experts. Our programme, and range of health support products, including meal replacement shakes, help people lose weight, stay healthy and live longer.
Dr Mosley was committed to using scientific evidence to help people lose weight for better health – not just a “better” body. This foundation means The Fast 800 is rooted in methods that enable long-term weight loss and better health outcomes.
We have proudly supported tens of thousands of people achieve just that, and will continue to honour Dr Mosley’s legacy to help more people into the future.
Try the Programme for free
Sign up today and your 7-day free trial begins immediately. Week 1 of your programme will start on: Monday 20th January
How much does the programme cost?
Joining is as easy as clicking here in order to join via our website, OR making payment via the Google Play / App Store. (Search for The Fast 800!)
If you join via our website, you will pay £119 / AUD$199 / USD$149 for your initial 12 weeks’ access.
Access thereafter is at £12 / AUD$22 / USD$15 per month. This payment will renew automatically until it is cancelled. You can stop your membership at any time via your Profile page.
To take advantage of more payment options (including a monthly format) or to pay in your region’s currency, you may wish to pay via the Google Play / App Store. Simply proceed through the signup and checkout process to see pricing options.
Please note:
- All offers are ONLY available through website signups
- 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?
The intermittent fasting diet is a flexible eating approach where individuals alternate between periods of eating and fasting. Science has shown that intermittent fasting is effective for weight loss, as well as a number of other health benefits.
How can I get into intermittent fasting in the UK?
At The Fast 800, we’re all about introducing you to the science and benefits of intermittent fasting in the UK. This is a sustainable approach to eating, designed to fit within your day-to-day life to improve your health.
Intermittent fasting is backed by plenty of research and success stories, and has been shown to support weight loss and enhance overall wellness. The Fast 800 will guide you through the intermittent fasting approach best suited to your goals and circumstances. For our community of members, it’s much more than a weight loss tool; it provides structure for long-term health improvement and maintenance.
What are the game-changing effects of an intermittent fasting programme?
Ask anyone following an intermittent fasting diet, and they’ll tell you it’s a complete game-changer. Aside from the weight-shedding benefits, the intermittent fasting lifestyle can impact your life in many unexpected, positive ways. It can help you:
- Gain control over your hunger cues.
- Improve your relationship with food.
- Develop a deeper understanding of your body’s needs.
It’s not just about the numbers on the scale; it’s about enhancing your overall wellbeing and vitality.
How can The Fast 800 help me start intermittent fasting?
If you’re starting this journey for the very first time, you may find yourself seeking a diet plan for intermittent fasting or a comprehensive intermittent fasting programme. That’s where The Fast 800 comes in!
Our intermittent fasting programme is designed to provide accessible, well-structured strategies to empower you to successfully navigate intermittent fasting in the UK.
Is an intermittent fasting programme right for me?
An intermittent fasting programme is the perfect gateway to a more balanced you. But it’s important to remember that everyone’s journey is personal and unique. That’s why our programme tailors the intermittent fasting diet to suit your specific goals, lifestyle, and needs.
This ensures that your journey toward better health and weight loss is not just effective but also sustainable.
How quickly can I expect to see results?
Everyone is different, and weight loss progress varies for each member of our community. However, many of our members report seeing a significant difference in their weight, health, and general wellbeing within a few weeks of starting the programme.
How will intermittent fasting impact my daily routine?
Intermittent fasting is flexible and can easily fit into your lifestyle. The Fast 800 programme provides a number of intermittent fasting strategies, so there is bound to be an approach that you can easily implement into your existing routine.
Can I exercise during an intermittent fasting diet?
Yes, it’s a great idea to integrate exercise into your fasting programme; physical activity is an important contributor to both physical and mental health. What’s great is that our fasting programme includes a range of exercise recommendations designed to fit various fitness levels (from low impact, chair-based to advanced) and lifestyle needs.
What’s included in the diet plan for intermittent fasting?
A diet plan for intermittent fasting includes tailored meal plans based on your preferences and goals, along with other tools to help you successfully navigate intermittent fasting. These entail delicious recipes, nutritional information, behavioural change strategies, physical activity recommendations and access to our lively community.
What support will I receive?
Our entire team, from nutritionists to fitness experts, is ready to guide you on your weight loss journey. Plus, through your membership, you will have ongoing access to our empowering resources and supportive community.