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Start your guided weight loss programme for better health.

7 day free trial

Based on science, designed for life

Weight loss for better health

Working with Dr Michael Mosley, we use the latest scientific research to create a game-changing approach to weight loss and healthy living.

Through a 12-week supported programme, an ongoing monthly subscription, an engaging community and a range of products to support your journey, The Fast 800 is here to help you maintain a life-long healthy lifestyle.

How we help

The Fast 800 is the umbrella term for a healthy lifestyle based on scientific evidence, encompassing diet, movement and mindfulness.

Our programmes, products and resources are based on years of experience with fasting, the 5:2, high intensity interval training (HIIT) and the Mediterranean diet.

The goal of The Fast 800 and our online programme is to empower you with the tools and knowledge to live a healthy lifestyle long-term. As a result, there are three flexible dietary approaches that can be followed and are designed to suit your goals and circumstances; you can switch easily between each approach as your needs change.

The Very Fast 800

A short-term rapid weight-loss phase used as a kick-start to improve metabolic health until a healthy weight is achieved, or for up to 12 weeks.

The New 5:2

Regular intermittent fasting for an effective, gradual way to lose weight and keep it off long term.

Way of Life

A long-term maintenance approach using Mediterranean-style recipes, ideal for weight management and improving metabolic health.

Our Story

We are a group of doctors and health professionals who grew frustrated with the increasing gap between what has long been widely accepted as “healthy eating” and the latest evidence on what actually works.

Based on some of the most promising and studied areas of research, we developed The Fast 800 online programme, shakes and multivitamins, to help people lose weight, stay healthy and live longer.

What makes us different?

Based on Science

Our actionable plan is based on the latest healthy living and weight loss studies, conducted by the most reputable institutions.

Easy and tasty

The Fast 800 recipes are based on a fresh Mediterranean-style diet full of protein, fibre and healthy fats. The meal plans we provide are suitable for vegetarians and non-vegetarians.

Rapid, sustainable weight loss

Research shows fasting outperforms a ‘standard diet’ when it comes to rapid and sustainable weight loss.

Tailored to you

As your goals and circumstances change, there is likely to be an approach suitable for you, whether you’re looking to lose a lot of weight for better health, or want to eat in a way that will support healthy ageing and promote longevity.

What our community says about us

"I lost 26kg in 24 weeks!"

Before trying The Fast 800, I had no structure to my meals. Thanks to The Fast 800, following The Very Fast 800 and then The New 5:2 on the online programme, I’ve lost 26kg and my mind is so much clearer.

- Tracy

“I loved the exercise videos, it was like having my own personal trainer!”

- Clarissa, Worcestershire

Lost 12lbs

“One word-Brilliant! I lost 28lb in 9-10 weeks and 7 inches off my waist. Also dropped 2 clothes sizes. Love this programme! 👍 I can’t praise The Fast 800 enough!!!”

Anne, Country Durham

Lost 13kgs

Start your 7-day free trial today!

Access your meal plan, shopping list, recipes, exercise plan and Health Coaches any time, anywhere. This newly upgraded Online Programme is interactive, easy-to-use and mobile-friendly.

The Fast 800 Online programme