- High in fibre and protein
- Nutritionist-designed
Lose weight for good
Using medically assisted weight loss? Maintain weight loss over the long term with sustainable healthy eating habits and lifestyle changes.
Get your personalised diet and lifestyle plan developed and trusted by doctors.
How to lose weight using medication
It’s important to mitigate side effects, stay healthy and keep weight off long-term.
What the drugs do
They mimic the hormone ‘glucagon-like peptide-1’, which reduces your appetite, slows some digestive processes and quietens cravings.
What if you stop
Your body returns to its usual appetite and you are likely to put weight back on if you have not established sustainable diet and exercise habits.
It’s important to...
Build habits that will keep weight off and support metabolic health. Prioritise high protein, high fibre meals and muscle-retaining achievable exercise.
Building healthy habits for the long-term
A long-term healthy lifestyle is achievable with the right support.
Nutrition during low appetite
Resistance exercise
Easy food choices
Long-term weight loss
High protein & fibre
Trusted support
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 1st June
Recommended by doctors
The Fast 800 was developed by Dr Michael Mosley and a team of doctors and weight loss experts. Our team of doctors and health professionals recommend our programme to:
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Ensure you get enough protein and fibre
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Avoid malnutrition with a nutritionist-designed meal plan and easy recipes
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Maintain your critical muscle mass with workouts designed by a personal trainer
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Keep the weight off long-term
Pawel lost 63kg
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Used The Fast 800 alongside medically assisted weight loss
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Pre-diabetes into remission
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Stopped snoring
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Blood pressure improved
What does it cost?
Transform your health in 12 weeks for only
per month for 3 months
12-week Guided Programme
- Start with a FREE 7 day trial, cancel any time
- Personalised meal plan, workouts and more
- Health coach support and member community
- Cancel any time during your first 7 days
Continue with flexible support for
per month
Monthly Graduate Membership
- Use what you have learnt in the 12-week programme
- Your first month of graduate support is FREE
- Access all your favourite recipes, workouts, Community and more
- No lock-in contract for the Monthly Graduate Membership
What's included
Personalised meal plans
Guided home workouts
- Tailored to your fitness level
- Suitable for low energy
1000+ simple and tasty recipes
- Automated shopping lists
- Options to feed the family
Real support when you need it
- Member-only Health Coaches
- Interact with members on the same journey as you
App to keep you on track
- Get your plan in the palm of your hand
- Easy and convenient
Help to make habits stick
- Science-based tools to help you long-term
- 50+ guided meditations
Trust The Fast 800 with your long-term weight loss
Sign up today and your 7-day free trial begins immediately. Week 1 of your programme will start on: Monday 1st June
As seen in
Frequently Asked Questions
Browse through our most commonly asked questions
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.
The Michael Mosley diet 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
- 900+ 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
Will The Fast 800 help with food noise?
You may have heard of food noise from Dr Jack Mosley’s latest book. The Fast 800 programme can help minimise food noise – the constant, unwanted thoughts about food – by supporting you to eat well and build healthy habits.
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.
Does the diet work without weight loss injections?
Absolutely! Many of our programme members lose weight naturally with The Fast 800Programme alone. See our success stories.
Is this 'Dr Mosley's Ozempic Diet'?
The Fast 800 is an established programme to help members lose weight and keep it off following a low calorie diet that prioritises protein, fibre and healthy fats. It’s designed to help you stay nourished while losing weight and was created by Dr Michael Mosley and a team of doctors and nutritionists. While the programme does not supply weight loss injections, it can be used as a companion to medically assisted weight loss.