- Developed by nutritionists, including macros and calorie counts
- Vegetarian options available
The 5:2™ Diet is not just a 'diet' - it’s a lifestyle proven to transform your health through intermittent fasting
5:2 diet plan
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The official home of the 5:2™ diet
When Dr Michael Mosley created the 5:2 diet following his own health struggles, he knew he was onto something. It pairs intermittent fasting, which is consistently proven to result in healthy weight loss, with a moderately low carb Mediterranean-style diet, the most healthy way of eating in the world.
The result is a lifestyle that is so sustainable it can be followed for life. Since it began, thousands of our members have used our Programme to guide them through the 5:2 diet and achieved results they could only dream of. Discover what you’re capable of today.
Join thousands who have already made the change
The 5:2™ diet - making weight loss easy
The 5:2 diet involves regular intermittent fasting for an effective, gradual way to lose weight and keep it off long term.
On two days per week, consume approximately 800 calories, otherwise there is no calorie restriction. Learn how on the only official 5:2 diet programme, developed by Dr Michael Mosley to support weight loss with a Mediterranean-style diet.
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7 day free trialHow the Programme can help
Comprehensive 5:2 diet meal plan to suit your goals
Round out your 5:2 lifestyle with 200 guided workouts
- Resistance, yoga, Pilates and cardio classes guided by fitness experts
- Low-impact beginner to advanced fitness
Hundreds of tasty intermittent fasting-friendly recipes
- Satisfying portions for fasting and non-fasting days
- Automated shopping lists for ultimate convenience
Real support from real people
- Exclusive direct Health Coach support
- Interactive community with others giving intermittent fasting a go
Exclusive app for members only
- Key weight loss tools you need, in the palm of your hand
- Access your 5:2 diet programme any time, anywhere
Keep on track with mindfulness and behaviour-change course
- Science-backed support to help keep on track with the 5:2 diet lifestyle
- 40+ guided mindfulness videos to support mind and body
What our members say
We've helped over 100,000 people just like you lose weight, keep it off and improve their health.
"The New 5:2 has been a revelation. I lost seven pounds in my first week and have continued to lose weight almost every week. My clothes fit better and people have noticed my weight loss," Hilary.
"My experience with The Fast 800 has been life-changing. It has empowered me to reclaim my health, energy, and happiness," Emma.
"I'm stronger, I’m fitter, I’m more flexible, I have more energy, which considering I’m a peri-menopausal woman, that's huge," Lara.
"I loved the whole approach - choosing the menus, having a shopping list, the various activities and all the different articles and support groups - a whole package," Annabel.
What does it cost?*
12 week programme
( – select your currency when you sign up)
This gives you access to the 12-week programme plus one extra month of membership to The Fast 800. After that, your ongoing monthly membership is . You can cancel this monthly membership at any time. *This price structure is only available via the website.
Free 7 day trial
Start your personalised programme now with your first 7 days absolutely free
Sign up today and your free trial begins immediately. Week 1 of your programme will start on:
Monday 16th December
Join today!Frequently asked questions
Browse through our most commonly asked questions
How does the 5:2 diet work?
The 5:2 diet involves two days of fasting (consuming 800 calories), and five days of no calorie restrictions. On non-fasting days, we simply advise following the principles of a low-carb, Mediterranean-style diet to promote healthy weight loss. It’s a sustainable and enjoyable way to approach weight loss, with the right guidance.
Who can follow a 5:2 diet?
The 5:2 diet and intermittent fasting is suitable for those who want a steady, sustainable weight loss experience. It works for both weight loss and weight management. Ideal for those who struggle with insulin sensitivity or high blood pressure, but check with your usual healthcare professional before beginning any drastic lifestyle change.
What foods should you eat on a 5:2 diet?
Focus on the quality of the calories you consume as much as the quantity. Eating a Mediterranean-style diet of quality proteins, healthy fats and whole foods will boost your metabolic health and keep you energised and satiated all day.
Is the 5:2 diet only for those looking to lose weight?
No, there are many benefits of a 5:2 diet aside from just weight loss, including improved autophagy, blood sugar management, insulin resistance, reduced risk of cancer, and even mood improvements. It can be followed for life to keep reaping the benefits.
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